./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix038_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:25:15,640 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:25:15,721 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:25:15,728 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:25:15,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:25:15,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:25:15,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:25:15,759 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:25:15,760 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:25:15,764 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:25:15,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:25:15,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:25:15,766 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:25:15,767 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:25:15,767 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:25:15,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:25:15,768 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:25:15,768 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:25:15,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:25:15,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:25:15,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:25:15,769 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:25:15,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:25:15,770 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:25:15,770 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:25:15,770 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:25:15,771 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:25:15,771 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:25:15,772 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:25:15,772 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:25:15,773 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:25:15,773 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:25:15,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:25:15,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:25:15,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:25:15,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:25:15,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:25:15,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:25:15,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:25:15,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:25:15,775 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:25:15,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:25:15,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:25:15,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:25:16,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:25:16,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:25:16,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:25:16,083 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:25:16,083 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:25:16,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:25:17,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:25:17,514 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:25:17,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:25:17,534 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6668f55b6/15716b861b61419c933543bf7c48fde5/FLAGc3730b33b [2024-06-28 03:25:17,546 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6668f55b6/15716b861b61419c933543bf7c48fde5 [2024-06-28 03:25:17,548 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:25:17,548 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:25:17,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-28 03:25:17,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:25:17,739 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:25:17,740 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:25:17,740 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:25:17,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:25:17,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:25:17" (1/2) ... [2024-06-28 03:25:17,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3616fb84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:25:17, skipping insertion in model container [2024-06-28 03:25:17,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:25:17" (1/2) ... [2024-06-28 03:25:17,749 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@541a1355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:25:17, skipping insertion in model container [2024-06-28 03:25:17,749 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:25:17" (2/2) ... [2024-06-28 03:25:17,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3616fb84 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:17, skipping insertion in model container [2024-06-28 03:25:17,750 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:25:17" (2/2) ... [2024-06-28 03:25:17,751 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:25:17,848 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:25:17,850 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-28 03:25:17,850 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-28 03:25:17,850 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-28 03:25:17,850 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:25:17,851 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-28 03:25:17,902 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:25:18,225 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:25:18,234 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:25:18,387 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:25:18,425 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:25:18,425 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18 WrapperNode [2024-06-28 03:25:18,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:25:18,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:25:18,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:25:18,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:25:18,434 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 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,452 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 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,489 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-28 03:25:18,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:25:18,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:25:18,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:25:18,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:25:18,503 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,506 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,523 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]. [2024-06-28 03:25:18,523 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,524 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,535 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,537 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:25:18,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:25:18,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:25:18,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:25:18,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (1/1) ... [2024-06-28 03:25:18,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:25:18,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:25:18,652 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) [2024-06-28 03:25:18,660 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 [2024-06-28 03:25:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:25:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:25:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:25:18,695 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:25:18,695 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:25:18,695 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:25:18,695 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:25:18,696 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:25:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:25:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:25:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:25:18,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:25:18,698 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:25:18,872 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:25:18,875 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:25:19,236 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:25:19,237 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:25:19,436 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:25:19,436 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:25:19,437 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:25:19 BoogieIcfgContainer [2024-06-28 03:25:19,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:25:19,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:25:19,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:25:19,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:25:19,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:25:17" (1/4) ... [2024-06-28 03:25:19,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757fca97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:25:19, skipping insertion in model container [2024-06-28 03:25:19,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:25:17" (2/4) ... [2024-06-28 03:25:19,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757fca97 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:25:19, skipping insertion in model container [2024-06-28 03:25:19,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:25:18" (3/4) ... [2024-06-28 03:25:19,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757fca97 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:25:19, skipping insertion in model container [2024-06-28 03:25:19,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:25:19" (4/4) ... [2024-06-28 03:25:19,447 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:25:19,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:25:19,464 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:25:19,464 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:25:19,545 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:25:19,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:25:19,631 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:25:19,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:25:19,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:25:19,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:25:19,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:25:19,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:25:19,662 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;@5f4102e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:25:19,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:25:19,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:25:19,670 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 03:25:19,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:25:19,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:19,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:25:19,672 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)] === [2024-06-28 03:25:19,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash 377005303, now seen corresponding path program 1 times [2024-06-28 03:25:19,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:19,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090390602] [2024-06-28 03:25:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:20,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:20,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090390602] [2024-06-28 03:25:20,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090390602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:20,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:20,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:25:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411621174] [2024-06-28 03:25:20,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:20,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:25:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:25:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:25:20,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:25:20,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:20,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:20,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:25:20,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:21,401 INFO L124 PetriNetUnfolderBase]: 1570/2419 cut-off events. [2024-06-28 03:25:21,402 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-28 03:25:21,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4840 conditions, 2419 events. 1570/2419 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11765 event pairs, 1123 based on Foata normal form. 1/2344 useless extension candidates. Maximal degree in co-relation 4828. Up to 2334 conditions per place. [2024-06-28 03:25:21,425 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-28 03:25:21,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-28 03:25:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:25:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:25:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-28 03:25:21,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-28 03:25:21,441 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-28 03:25:21,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-28 03:25:21,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:25:21,448 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:25:21,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:25:21,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:25:21,455 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:25:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:21,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:21,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:21,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:25:21,456 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)] === [2024-06-28 03:25:21,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958000, now seen corresponding path program 1 times [2024-06-28 03:25:21,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:21,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103198356] [2024-06-28 03:25:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:22,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:22,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103198356] [2024-06-28 03:25:22,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103198356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:22,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:22,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:25:22,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861103278] [2024-06-28 03:25:22,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:22,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:25:22,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:25:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:25:22,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:25:22,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:22,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:22,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:25:22,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:22,685 INFO L124 PetriNetUnfolderBase]: 1564/2415 cut-off events. [2024-06-28 03:25:22,686 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2024-06-28 03:25:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5442 conditions, 2415 events. 1564/2415 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11736 event pairs, 981 based on Foata normal form. 3/2381 useless extension candidates. Maximal degree in co-relation 5430. Up to 2310 conditions per place. [2024-06-28 03:25:22,701 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-28 03:25:22,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-28 03:25:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:25:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:25:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-28 03:25:22,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 03:25:22,703 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-28 03:25:22,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-28 03:25:22,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:25:22,706 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:25:22,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:25:22,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:25:22,707 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:25:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:22,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:22,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:22,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:25:22,708 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)] === [2024-06-28 03:25:22,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash 29058686, now seen corresponding path program 1 times [2024-06-28 03:25:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:22,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688166164] [2024-06-28 03:25:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:22,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:23,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:23,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688166164] [2024-06-28 03:25:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688166164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:23,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:23,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:25:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101674705] [2024-06-28 03:25:23,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:23,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:25:23,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:25:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:25:23,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:25:23,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2024-06-28 03:25:23,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:23,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:25:23,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:23,925 INFO L124 PetriNetUnfolderBase]: 1618/2518 cut-off events. [2024-06-28 03:25:23,925 INFO L125 PetriNetUnfolderBase]: For 1322/1322 co-relation queries the response was YES. [2024-06-28 03:25:23,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 2518 events. 1618/2518 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12392 event pairs, 739 based on Foata normal form. 7/2510 useless extension candidates. Maximal degree in co-relation 6255. Up to 2279 conditions per place. [2024-06-28 03:25:23,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-28 03:25:23,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 404 flow [2024-06-28 03:25:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:25:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:25:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-28 03:25:23,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 03:25:23,952 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 130 transitions. [2024-06-28 03:25:23,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 404 flow [2024-06-28 03:25:23,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:25:23,958 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 239 flow [2024-06-28 03:25:23,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-28 03:25:23,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-28 03:25:23,959 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 239 flow [2024-06-28 03:25:23,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2024-06-28 03:25:23,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:23,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:23,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:25:23,960 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)] === [2024-06-28 03:25:23,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:23,961 INFO L85 PathProgramCache]: Analyzing trace with hash 817703349, now seen corresponding path program 1 times [2024-06-28 03:25:23,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:23,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190030825] [2024-06-28 03:25:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:23,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:25,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:25,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190030825] [2024-06-28 03:25:25,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190030825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:25,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:25,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:25:25,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577732396] [2024-06-28 03:25:25,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:25,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:25:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:25:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:25:25,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:25:25,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:25,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:25,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:25:25,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:25,770 INFO L124 PetriNetUnfolderBase]: 1640/2550 cut-off events. [2024-06-28 03:25:25,770 INFO L125 PetriNetUnfolderBase]: For 3233/3233 co-relation queries the response was YES. [2024-06-28 03:25:25,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7667 conditions, 2550 events. 1640/2550 cut-off events. For 3233/3233 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12658 event pairs, 595 based on Foata normal form. 7/2541 useless extension candidates. Maximal degree in co-relation 7650. Up to 2268 conditions per place. [2024-06-28 03:25:25,789 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 20 changer transitions 0/89 dead transitions. [2024-06-28 03:25:25,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 543 flow [2024-06-28 03:25:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:25:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:25:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-28 03:25:25,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 03:25:25,791 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 239 flow. Second operand 6 states and 154 transitions. [2024-06-28 03:25:25,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 543 flow [2024-06-28 03:25:25,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 535 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:25:25,796 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 312 flow [2024-06-28 03:25:25,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-28 03:25:25,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 03:25:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 312 flow [2024-06-28 03:25:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:25,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:25,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:25:25,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:25,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2139342659, now seen corresponding path program 1 times [2024-06-28 03:25:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:25,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781150878] [2024-06-28 03:25:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:27,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:27,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781150878] [2024-06-28 03:25:27,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781150878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:27,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:27,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:25:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229830529] [2024-06-28 03:25:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:27,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:25:27,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:25:27,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:25:27,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-28 03:25:27,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-28 03:25:27,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:27,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-28 03:25:27,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:27,854 INFO L124 PetriNetUnfolderBase]: 1743/2729 cut-off events. [2024-06-28 03:25:27,854 INFO L125 PetriNetUnfolderBase]: For 5462/5462 co-relation queries the response was YES. [2024-06-28 03:25:27,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9108 conditions, 2729 events. 1743/2729 cut-off events. For 5462/5462 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13830 event pairs, 446 based on Foata normal form. 30/2741 useless extension candidates. Maximal degree in co-relation 9088. Up to 2231 conditions per place. [2024-06-28 03:25:27,871 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 72 selfloop transitions, 22 changer transitions 0/100 dead transitions. [2024-06-28 03:25:27,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 100 transitions, 666 flow [2024-06-28 03:25:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:25:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:25:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 03:25:27,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-28 03:25:27,873 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 312 flow. Second operand 7 states and 177 transitions. [2024-06-28 03:25:27,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 100 transitions, 666 flow [2024-06-28 03:25:27,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 100 transitions, 617 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:27,880 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 330 flow [2024-06-28 03:25:27,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-28 03:25:27,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 03:25:27,882 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 330 flow [2024-06-28 03:25:27,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-28 03:25:27,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:27,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:27,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:25:27,887 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)] === [2024-06-28 03:25:27,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash -856778795, now seen corresponding path program 1 times [2024-06-28 03:25:27,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:27,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008871776] [2024-06-28 03:25:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:27,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:28,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008871776] [2024-06-28 03:25:28,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008871776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:28,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:28,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:25:28,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360033401] [2024-06-28 03:25:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:28,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:25:28,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:25:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:25:28,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:28,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:28,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:28,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:29,185 INFO L124 PetriNetUnfolderBase]: 1733/2728 cut-off events. [2024-06-28 03:25:29,185 INFO L125 PetriNetUnfolderBase]: For 6857/6857 co-relation queries the response was YES. [2024-06-28 03:25:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9522 conditions, 2728 events. 1733/2728 cut-off events. For 6857/6857 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13892 event pairs, 618 based on Foata normal form. 4/2723 useless extension candidates. Maximal degree in co-relation 9500. Up to 2586 conditions per place. [2024-06-28 03:25:29,213 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 54 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-28 03:25:29,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 510 flow [2024-06-28 03:25:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:25:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:25:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-28 03:25:29,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-28 03:25:29,215 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 330 flow. Second operand 5 states and 97 transitions. [2024-06-28 03:25:29,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 510 flow [2024-06-28 03:25:29,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 459 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:29,224 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 339 flow [2024-06-28 03:25:29,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-28 03:25:29,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 03:25:29,227 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 339 flow [2024-06-28 03:25:29,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:29,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:29,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:29,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:25:29,228 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)] === [2024-06-28 03:25:29,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -189988078, now seen corresponding path program 1 times [2024-06-28 03:25:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:29,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732629952] [2024-06-28 03:25:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:29,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:30,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732629952] [2024-06-28 03:25:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732629952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:30,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:30,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:25:30,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726157571] [2024-06-28 03:25:30,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:30,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:25:30,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:30,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:25:30,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:25:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:30,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:30,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:30,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:30,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:30,658 INFO L124 PetriNetUnfolderBase]: 1745/2739 cut-off events. [2024-06-28 03:25:30,658 INFO L125 PetriNetUnfolderBase]: For 8444/8444 co-relation queries the response was YES. [2024-06-28 03:25:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9878 conditions, 2739 events. 1745/2739 cut-off events. For 8444/8444 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13924 event pairs, 550 based on Foata normal form. 8/2733 useless extension candidates. Maximal degree in co-relation 9854. Up to 2484 conditions per place. [2024-06-28 03:25:30,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-28 03:25:30,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 599 flow [2024-06-28 03:25:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:25:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:25:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-28 03:25:30,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-28 03:25:30,680 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 339 flow. Second operand 6 states and 124 transitions. [2024-06-28 03:25:30,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 599 flow [2024-06-28 03:25:30,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 83 transitions, 569 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 03:25:30,689 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 381 flow [2024-06-28 03:25:30,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-28 03:25:30,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-28 03:25:30,692 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 381 flow [2024-06-28 03:25:30,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:30,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:30,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:30,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:25:30,693 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)] === [2024-06-28 03:25:30,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1270084288, now seen corresponding path program 2 times [2024-06-28 03:25:30,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:30,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749367614] [2024-06-28 03:25:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:30,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749367614] [2024-06-28 03:25:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749367614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:31,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:31,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:25:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264407206] [2024-06-28 03:25:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:25:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:25:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:25:31,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:31,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 381 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:31,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:31,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:31,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:32,121 INFO L124 PetriNetUnfolderBase]: 1703/2664 cut-off events. [2024-06-28 03:25:32,121 INFO L125 PetriNetUnfolderBase]: For 9720/9720 co-relation queries the response was YES. [2024-06-28 03:25:32,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9900 conditions, 2664 events. 1703/2664 cut-off events. For 9720/9720 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13374 event pairs, 594 based on Foata normal form. 4/2655 useless extension candidates. Maximal degree in co-relation 9875. Up to 2517 conditions per place. [2024-06-28 03:25:32,138 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-28 03:25:32,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 567 flow [2024-06-28 03:25:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:25:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:25:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-28 03:25:32,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:25:32,142 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 381 flow. Second operand 6 states and 114 transitions. [2024-06-28 03:25:32,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 567 flow [2024-06-28 03:25:32,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 77 transitions, 538 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:25:32,154 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 382 flow [2024-06-28 03:25:32,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-28 03:25:32,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-28 03:25:32,157 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 382 flow [2024-06-28 03:25:32,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:32,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:32,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:25:32,158 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)] === [2024-06-28 03:25:32,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash -219368060, now seen corresponding path program 1 times [2024-06-28 03:25:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765386275] [2024-06-28 03:25:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765386275] [2024-06-28 03:25:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765386275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:33,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:33,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:25:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99215295] [2024-06-28 03:25:33,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:33,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:25:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:25:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:25:33,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:33,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 382 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-28 03:25:33,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:33,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:33,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:34,199 INFO L124 PetriNetUnfolderBase]: 2071/3180 cut-off events. [2024-06-28 03:25:34,199 INFO L125 PetriNetUnfolderBase]: For 13246/13246 co-relation queries the response was YES. [2024-06-28 03:25:34,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11780 conditions, 3180 events. 2071/3180 cut-off events. For 13246/13246 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15477 event pairs, 746 based on Foata normal form. 4/3166 useless extension candidates. Maximal degree in co-relation 11754. Up to 3032 conditions per place. [2024-06-28 03:25:34,221 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-28 03:25:34,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 641 flow [2024-06-28 03:25:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:25:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:25:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:25:34,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:25:34,222 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 382 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:25:34,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 641 flow [2024-06-28 03:25:34,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 587 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:25:34,239 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 420 flow [2024-06-28 03:25:34,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-28 03:25:34,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-28 03:25:34,240 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 420 flow [2024-06-28 03:25:34,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-28 03:25:34,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:34,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:34,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:25:34,241 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:34,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1516905776, now seen corresponding path program 1 times [2024-06-28 03:25:34,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:34,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3812311] [2024-06-28 03:25:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:34,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:34,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3812311] [2024-06-28 03:25:34,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3812311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:34,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:34,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:25:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648162315] [2024-06-28 03:25:34,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:34,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:25:34,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:25:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:25:34,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:34,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 420 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2024-06-28 03:25:34,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:34,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:34,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:35,578 INFO L124 PetriNetUnfolderBase]: 2068/3176 cut-off events. [2024-06-28 03:25:35,579 INFO L125 PetriNetUnfolderBase]: For 15578/15578 co-relation queries the response was YES. [2024-06-28 03:25:35,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12297 conditions, 3176 events. 2068/3176 cut-off events. For 15578/15578 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15358 event pairs, 763 based on Foata normal form. 1/3176 useless extension candidates. Maximal degree in co-relation 12270. Up to 3070 conditions per place. [2024-06-28 03:25:35,600 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 65 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2024-06-28 03:25:35,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 610 flow [2024-06-28 03:25:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:25:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:25:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 03:25:35,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 03:25:35,602 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 420 flow. Second operand 5 states and 88 transitions. [2024-06-28 03:25:35,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 610 flow [2024-06-28 03:25:35,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 567 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:35,618 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 429 flow [2024-06-28 03:25:35,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-28 03:25:35,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-28 03:25:35,620 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 429 flow [2024-06-28 03:25:35,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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) [2024-06-28 03:25:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:35,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:25:35,621 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)] === [2024-06-28 03:25:35,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2101279345, now seen corresponding path program 1 times [2024-06-28 03:25:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751448552] [2024-06-28 03:25:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:36,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751448552] [2024-06-28 03:25:36,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751448552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:36,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:36,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:25:36,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837039525] [2024-06-28 03:25:36,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:36,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:25:36,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:25:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:25:36,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:36,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-28 03:25:36,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:36,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:36,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:37,517 INFO L124 PetriNetUnfolderBase]: 1957/3034 cut-off events. [2024-06-28 03:25:37,517 INFO L125 PetriNetUnfolderBase]: For 18021/18021 co-relation queries the response was YES. [2024-06-28 03:25:37,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12223 conditions, 3034 events. 1957/3034 cut-off events. For 18021/18021 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15396 event pairs, 614 based on Foata normal form. 4/3030 useless extension candidates. Maximal degree in co-relation 12195. Up to 2653 conditions per place. [2024-06-28 03:25:37,539 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 33 changer transitions 0/111 dead transitions. [2024-06-28 03:25:37,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 889 flow [2024-06-28 03:25:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:25:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:25:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 03:25:37,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-28 03:25:37,541 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 429 flow. Second operand 7 states and 148 transitions. [2024-06-28 03:25:37,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 889 flow [2024-06-28 03:25:37,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 859 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 03:25:37,567 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 581 flow [2024-06-28 03:25:37,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=581, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-28 03:25:37,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-28 03:25:37,567 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 581 flow [2024-06-28 03:25:37,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-28 03:25:37,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:37,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:25:37,568 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)] === [2024-06-28 03:25:37,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2101369555, now seen corresponding path program 2 times [2024-06-28 03:25:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:37,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112384894] [2024-06-28 03:25:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:38,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:38,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112384894] [2024-06-28 03:25:38,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112384894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:38,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:38,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:25:38,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464075116] [2024-06-28 03:25:38,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:38,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:25:38,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:38,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:25:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:25:38,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:38,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-28 03:25:38,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:38,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:38,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:39,394 INFO L124 PetriNetUnfolderBase]: 1963/3042 cut-off events. [2024-06-28 03:25:39,394 INFO L125 PetriNetUnfolderBase]: For 21880/21880 co-relation queries the response was YES. [2024-06-28 03:25:39,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13232 conditions, 3042 events. 1963/3042 cut-off events. For 21880/21880 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15357 event pairs, 623 based on Foata normal form. 4/3043 useless extension candidates. Maximal degree in co-relation 13202. Up to 2731 conditions per place. [2024-06-28 03:25:39,414 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 77 selfloop transitions, 30 changer transitions 0/113 dead transitions. [2024-06-28 03:25:39,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 113 transitions, 959 flow [2024-06-28 03:25:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:25:39,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-28 03:25:39,417 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 581 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:25:39,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 113 transitions, 959 flow [2024-06-28 03:25:39,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 917 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 03:25:39,441 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 647 flow [2024-06-28 03:25:39,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=647, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-28 03:25:39,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-28 03:25:39,442 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 647 flow [2024-06-28 03:25:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-28 03:25:39,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:39,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:39,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:25:39,443 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)] === [2024-06-28 03:25:39,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash 67604691, now seen corresponding path program 1 times [2024-06-28 03:25:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:39,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168988264] [2024-06-28 03:25:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:39,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:40,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:40,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168988264] [2024-06-28 03:25:40,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168988264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:40,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:40,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:25:40,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242920131] [2024-06-28 03:25:40,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:40,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:25:40,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:25:40,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:25:40,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:40,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 647 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-28 03:25:40,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:40,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:40,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:41,274 INFO L124 PetriNetUnfolderBase]: 2119/3248 cut-off events. [2024-06-28 03:25:41,274 INFO L125 PetriNetUnfolderBase]: For 25491/25491 co-relation queries the response was YES. [2024-06-28 03:25:41,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14497 conditions, 3248 events. 2119/3248 cut-off events. For 25491/25491 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15732 event pairs, 746 based on Foata normal form. 2/3249 useless extension candidates. Maximal degree in co-relation 14465. Up to 3094 conditions per place. [2024-06-28 03:25:41,298 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 19 changer transitions 0/107 dead transitions. [2024-06-28 03:25:41,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 974 flow [2024-06-28 03:25:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:25:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:25:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:25:41,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:25:41,300 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 647 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:25:41,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 974 flow [2024-06-28 03:25:41,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 890 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:41,328 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 694 flow [2024-06-28 03:25:41,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-06-28 03:25:41,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-28 03:25:41,330 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 694 flow [2024-06-28 03:25:41,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-28 03:25:41,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:41,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:25:41,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:41,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -220560126, now seen corresponding path program 1 times [2024-06-28 03:25:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:41,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579303219] [2024-06-28 03:25:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:42,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:42,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579303219] [2024-06-28 03:25:42,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579303219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:42,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:42,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:25:42,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151340729] [2024-06-28 03:25:42,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:42,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:25:42,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:42,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:25:42,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:25:42,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:25:42,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 694 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:42,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:42,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:25:42,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:42,816 INFO L124 PetriNetUnfolderBase]: 2368/3516 cut-off events. [2024-06-28 03:25:42,817 INFO L125 PetriNetUnfolderBase]: For 32761/32761 co-relation queries the response was YES. [2024-06-28 03:25:42,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16266 conditions, 3516 events. 2368/3516 cut-off events. For 32761/32761 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16452 event pairs, 853 based on Foata normal form. 1/3516 useless extension candidates. Maximal degree in co-relation 16233. Up to 3498 conditions per place. [2024-06-28 03:25:42,844 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 85 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2024-06-28 03:25:42,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 99 transitions, 936 flow [2024-06-28 03:25:42,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:25:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:25:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 03:25:42,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:25:42,846 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 694 flow. Second operand 6 states and 96 transitions. [2024-06-28 03:25:42,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 99 transitions, 936 flow [2024-06-28 03:25:42,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 888 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:42,883 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 708 flow [2024-06-28 03:25:42,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=708, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-28 03:25:42,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 03:25:42,884 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 708 flow [2024-06-28 03:25:42,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:42,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:42,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:42,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:25:42,886 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)] === [2024-06-28 03:25:42,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash 715091049, now seen corresponding path program 1 times [2024-06-28 03:25:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:42,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747846033] [2024-06-28 03:25:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:42,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:44,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747846033] [2024-06-28 03:25:44,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747846033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:44,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:44,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:25:44,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225107553] [2024-06-28 03:25:44,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:44,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:25:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:25:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:25:44,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:44,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 708 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:44,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:44,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:44,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:44,957 INFO L124 PetriNetUnfolderBase]: 2282/3542 cut-off events. [2024-06-28 03:25:44,957 INFO L125 PetriNetUnfolderBase]: For 41664/41664 co-relation queries the response was YES. [2024-06-28 03:25:44,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 3542 events. 2282/3542 cut-off events. For 41664/41664 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18477 event pairs, 420 based on Foata normal form. 16/3555 useless extension candidates. Maximal degree in co-relation 17155. Up to 2568 conditions per place. [2024-06-28 03:25:44,985 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 33 changer transitions 0/136 dead transitions. [2024-06-28 03:25:44,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 1196 flow [2024-06-28 03:25:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-28 03:25:44,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-28 03:25:44,987 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 708 flow. Second operand 8 states and 169 transitions. [2024-06-28 03:25:44,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 1196 flow [2024-06-28 03:25:45,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 136 transitions, 1156 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:45,031 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 778 flow [2024-06-28 03:25:45,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=778, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-28 03:25:45,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 03:25:45,032 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 778 flow [2024-06-28 03:25:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:45,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:45,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:45,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:25:45,033 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)] === [2024-06-28 03:25:45,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash 828655209, now seen corresponding path program 2 times [2024-06-28 03:25:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:45,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768521651] [2024-06-28 03:25:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:46,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768521651] [2024-06-28 03:25:46,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768521651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:46,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:46,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:25:46,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155428189] [2024-06-28 03:25:46,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:46,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:25:46,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:25:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:25:46,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:46,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 778 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:46,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:46,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:46,979 INFO L124 PetriNetUnfolderBase]: 2357/3668 cut-off events. [2024-06-28 03:25:46,979 INFO L125 PetriNetUnfolderBase]: For 48045/48045 co-relation queries the response was YES. [2024-06-28 03:25:46,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18309 conditions, 3668 events. 2357/3668 cut-off events. For 48045/48045 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19430 event pairs, 642 based on Foata normal form. 20/3685 useless extension candidates. Maximal degree in co-relation 18274. Up to 3096 conditions per place. [2024-06-28 03:25:47,005 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 41 changer transitions 0/134 dead transitions. [2024-06-28 03:25:47,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1282 flow [2024-06-28 03:25:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 03:25:47,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:25:47,007 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 778 flow. Second operand 8 states and 168 transitions. [2024-06-28 03:25:47,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1282 flow [2024-06-28 03:25:47,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 134 transitions, 1239 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:47,061 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 846 flow [2024-06-28 03:25:47,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=846, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-06-28 03:25:47,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-28 03:25:47,062 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 846 flow [2024-06-28 03:25:47,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:47,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:47,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:47,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:25:47,063 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)] === [2024-06-28 03:25:47,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1380739999, now seen corresponding path program 3 times [2024-06-28 03:25:47,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:47,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910827735] [2024-06-28 03:25:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910827735] [2024-06-28 03:25:48,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910827735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:48,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:48,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:25:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156881025] [2024-06-28 03:25:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:25:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:25:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:25:48,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 03:25:48,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:48,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:48,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 03:25:48,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:49,094 INFO L124 PetriNetUnfolderBase]: 2382/3715 cut-off events. [2024-06-28 03:25:49,094 INFO L125 PetriNetUnfolderBase]: For 53193/53193 co-relation queries the response was YES. [2024-06-28 03:25:49,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18890 conditions, 3715 events. 2382/3715 cut-off events. For 53193/53193 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19806 event pairs, 679 based on Foata normal form. 20/3732 useless extension candidates. Maximal degree in co-relation 18853. Up to 3226 conditions per place. [2024-06-28 03:25:49,115 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-28 03:25:49,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 1280 flow [2024-06-28 03:25:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 03:25:49,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 03:25:49,117 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 846 flow. Second operand 8 states and 163 transitions. [2024-06-28 03:25:49,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 1280 flow [2024-06-28 03:25:49,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1193 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 03:25:49,167 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 858 flow [2024-06-28 03:25:49,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2024-06-28 03:25:49,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-28 03:25:49,168 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 858 flow [2024-06-28 03:25:49,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:49,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:49,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:49,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:25:49,169 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)] === [2024-06-28 03:25:49,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:49,169 INFO L85 PathProgramCache]: Analyzing trace with hash 833423877, now seen corresponding path program 1 times [2024-06-28 03:25:49,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:49,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805987284] [2024-06-28 03:25:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:49,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:50,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:50,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805987284] [2024-06-28 03:25:50,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805987284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:50,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:50,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:50,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092528165] [2024-06-28 03:25:50,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:50,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:50,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:50,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:50,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:50,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 858 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:50,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:50,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:50,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:51,307 INFO L124 PetriNetUnfolderBase]: 2542/3923 cut-off events. [2024-06-28 03:25:51,307 INFO L125 PetriNetUnfolderBase]: For 57761/57763 co-relation queries the response was YES. [2024-06-28 03:25:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20060 conditions, 3923 events. 2542/3923 cut-off events. For 57761/57763 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20234 event pairs, 738 based on Foata normal form. 8/3930 useless extension candidates. Maximal degree in co-relation 20022. Up to 3558 conditions per place. [2024-06-28 03:25:51,331 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 96 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2024-06-28 03:25:51,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1265 flow [2024-06-28 03:25:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:25:51,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-28 03:25:51,333 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 858 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:25:51,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1265 flow [2024-06-28 03:25:51,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1184 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:25:51,387 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 934 flow [2024-06-28 03:25:51,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-28 03:25:51,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-28 03:25:51,388 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 934 flow [2024-06-28 03:25:51,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:51,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:51,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:51,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:25:51,389 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:51,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:51,389 INFO L85 PathProgramCache]: Analyzing trace with hash 595152581, now seen corresponding path program 1 times [2024-06-28 03:25:51,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:51,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937286944] [2024-06-28 03:25:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:51,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:52,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:52,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937286944] [2024-06-28 03:25:52,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937286944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:52,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:52,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:25:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832316948] [2024-06-28 03:25:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:52,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:25:52,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:25:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:25:52,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:52,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 934 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:25:52,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:52,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:52,936 INFO L124 PetriNetUnfolderBase]: 2595/3977 cut-off events. [2024-06-28 03:25:52,936 INFO L125 PetriNetUnfolderBase]: For 61027/61027 co-relation queries the response was YES. [2024-06-28 03:25:52,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20983 conditions, 3977 events. 2595/3977 cut-off events. For 61027/61027 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20216 event pairs, 837 based on Foata normal form. 1/3977 useless extension candidates. Maximal degree in co-relation 20943. Up to 3833 conditions per place. [2024-06-28 03:25:52,958 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 102 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2024-06-28 03:25:52,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 1306 flow [2024-06-28 03:25:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:25:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:25:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 03:25:52,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:25:52,959 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 934 flow. Second operand 6 states and 110 transitions. [2024-06-28 03:25:52,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 1306 flow [2024-06-28 03:25:53,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 123 transitions, 1220 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:53,015 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 952 flow [2024-06-28 03:25:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=952, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-28 03:25:53,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-28 03:25:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 952 flow [2024-06-28 03:25:53,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:25:53,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:53,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:25:53,017 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)] === [2024-06-28 03:25:53,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash -367843165, now seen corresponding path program 2 times [2024-06-28 03:25:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785242497] [2024-06-28 03:25:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:54,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:54,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785242497] [2024-06-28 03:25:54,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785242497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:54,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:54,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:54,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86362237] [2024-06-28 03:25:54,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:54,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:54,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:54,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 952 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:54,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:54,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:54,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:55,143 INFO L124 PetriNetUnfolderBase]: 2612/4004 cut-off events. [2024-06-28 03:25:55,143 INFO L125 PetriNetUnfolderBase]: For 68351/68351 co-relation queries the response was YES. [2024-06-28 03:25:55,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21520 conditions, 4004 events. 2612/4004 cut-off events. For 68351/68351 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20360 event pairs, 846 based on Foata normal form. 4/4007 useless extension candidates. Maximal degree in co-relation 21479. Up to 3831 conditions per place. [2024-06-28 03:25:55,163 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 16 changer transitions 0/134 dead transitions. [2024-06-28 03:25:55,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1312 flow [2024-06-28 03:25:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:25:55,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:25:55,165 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 952 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:25:55,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1312 flow [2024-06-28 03:25:55,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 134 transitions, 1280 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 03:25:55,218 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 1001 flow [2024-06-28 03:25:55,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1001, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2024-06-28 03:25:55,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-28 03:25:55,219 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 1001 flow [2024-06-28 03:25:55,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:55,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:55,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:55,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:25:55,219 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)] === [2024-06-28 03:25:55,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1343579525, now seen corresponding path program 3 times [2024-06-28 03:25:55,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:55,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912229823] [2024-06-28 03:25:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:55,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912229823] [2024-06-28 03:25:56,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912229823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:56,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:56,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:56,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979261460] [2024-06-28 03:25:56,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:56,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:56,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:56,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:56,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:56,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 1001 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:56,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:56,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:56,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:57,298 INFO L124 PetriNetUnfolderBase]: 2604/3992 cut-off events. [2024-06-28 03:25:57,298 INFO L125 PetriNetUnfolderBase]: For 74422/74422 co-relation queries the response was YES. [2024-06-28 03:25:57,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21903 conditions, 3992 events. 2604/3992 cut-off events. For 74422/74422 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20278 event pairs, 844 based on Foata normal form. 4/3995 useless extension candidates. Maximal degree in co-relation 21860. Up to 3792 conditions per place. [2024-06-28 03:25:57,327 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 21 changer transitions 0/140 dead transitions. [2024-06-28 03:25:57,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 140 transitions, 1408 flow [2024-06-28 03:25:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:25:57,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:25:57,328 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 1001 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:25:57,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 140 transitions, 1408 flow [2024-06-28 03:25:57,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 140 transitions, 1343 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 03:25:57,395 INFO L231 Difference]: Finished difference. Result has 105 places, 114 transitions, 1068 flow [2024-06-28 03:25:57,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1068, PETRI_PLACES=105, PETRI_TRANSITIONS=114} [2024-06-28 03:25:57,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-28 03:25:57,396 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 114 transitions, 1068 flow [2024-06-28 03:25:57,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:57,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:57,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:57,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:25:57,396 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)] === [2024-06-28 03:25:57,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1580051555, now seen corresponding path program 4 times [2024-06-28 03:25:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:57,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176412931] [2024-06-28 03:25:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:58,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:58,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176412931] [2024-06-28 03:25:58,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176412931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:58,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:58,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106102766] [2024-06-28 03:25:58,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:58,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:58,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:25:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 114 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:25:58,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:59,123 INFO L124 PetriNetUnfolderBase]: 2621/4019 cut-off events. [2024-06-28 03:25:59,124 INFO L125 PetriNetUnfolderBase]: For 82051/82051 co-relation queries the response was YES. [2024-06-28 03:25:59,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22668 conditions, 4019 events. 2621/4019 cut-off events. For 82051/82051 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20433 event pairs, 820 based on Foata normal form. 4/4022 useless extension candidates. Maximal degree in co-relation 22623. Up to 3832 conditions per place. [2024-06-28 03:25:59,151 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 119 selfloop transitions, 17 changer transitions 0/141 dead transitions. [2024-06-28 03:25:59,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 141 transitions, 1438 flow [2024-06-28 03:25:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:25:59,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:25:59,157 INFO L175 Difference]: Start difference. First operand has 105 places, 114 transitions, 1068 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:25:59,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 141 transitions, 1438 flow [2024-06-28 03:25:59,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 141 transitions, 1355 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:59,240 INFO L231 Difference]: Finished difference. Result has 108 places, 116 transitions, 1066 flow [2024-06-28 03:25:59,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=108, PETRI_TRANSITIONS=116} [2024-06-28 03:25:59,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-28 03:25:59,240 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 116 transitions, 1066 flow [2024-06-28 03:25:59,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:59,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:59,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:59,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:25:59,241 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)] === [2024-06-28 03:25:59,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1579754885, now seen corresponding path program 5 times [2024-06-28 03:25:59,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:59,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611297650] [2024-06-28 03:25:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:00,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:00,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611297650] [2024-06-28 03:26:00,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611297650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:00,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:00,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:00,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234404372] [2024-06-28 03:26:00,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:00,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:00,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:00,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:00,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:00,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 116 transitions, 1066 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:00,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:00,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:00,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:01,140 INFO L124 PetriNetUnfolderBase]: 2613/4007 cut-off events. [2024-06-28 03:26:01,140 INFO L125 PetriNetUnfolderBase]: For 88108/88108 co-relation queries the response was YES. [2024-06-28 03:26:01,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22829 conditions, 4007 events. 2613/4007 cut-off events. For 88108/88108 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20397 event pairs, 833 based on Foata normal form. 4/4010 useless extension candidates. Maximal degree in co-relation 22783. Up to 3798 conditions per place. [2024-06-28 03:26:01,166 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 23 changer transitions 0/143 dead transitions. [2024-06-28 03:26:01,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 143 transitions, 1446 flow [2024-06-28 03:26:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:26:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:26:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:26:01,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:26:01,168 INFO L175 Difference]: Start difference. First operand has 108 places, 116 transitions, 1066 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:26:01,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 143 transitions, 1446 flow [2024-06-28 03:26:01,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 143 transitions, 1383 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 03:26:01,260 INFO L231 Difference]: Finished difference. Result has 110 places, 118 transitions, 1103 flow [2024-06-28 03:26:01,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1103, PETRI_PLACES=110, PETRI_TRANSITIONS=118} [2024-06-28 03:26:01,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-28 03:26:01,261 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 118 transitions, 1103 flow [2024-06-28 03:26:01,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:01,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:01,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:01,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:26:01,262 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)] === [2024-06-28 03:26:01,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1579754637, now seen corresponding path program 1 times [2024-06-28 03:26:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39582313] [2024-06-28 03:26:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:01,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:02,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:02,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39582313] [2024-06-28 03:26:02,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39582313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:02,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:02,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:26:02,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691351519] [2024-06-28 03:26:02,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:02,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:26:02,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:26:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:26:02,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:02,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 118 transitions, 1103 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:02,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:02,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:02,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:03,054 INFO L124 PetriNetUnfolderBase]: 2608/4001 cut-off events. [2024-06-28 03:26:03,055 INFO L125 PetriNetUnfolderBase]: For 94185/94187 co-relation queries the response was YES. [2024-06-28 03:26:03,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23140 conditions, 4001 events. 2608/4001 cut-off events. For 94185/94187 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20404 event pairs, 765 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 23093. Up to 3645 conditions per place. [2024-06-28 03:26:03,081 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 38 changer transitions 0/142 dead transitions. [2024-06-28 03:26:03,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1447 flow [2024-06-28 03:26:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:26:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:26:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-28 03:26:03,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-28 03:26:03,082 INFO L175 Difference]: Start difference. First operand has 110 places, 118 transitions, 1103 flow. Second operand 6 states and 124 transitions. [2024-06-28 03:26:03,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1447 flow [2024-06-28 03:26:03,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 142 transitions, 1361 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 03:26:03,174 INFO L231 Difference]: Finished difference. Result has 110 places, 118 transitions, 1111 flow [2024-06-28 03:26:03,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1111, PETRI_PLACES=110, PETRI_TRANSITIONS=118} [2024-06-28 03:26:03,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-28 03:26:03,175 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 118 transitions, 1111 flow [2024-06-28 03:26:03,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:03,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:03,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:26:03,176 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:03,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2043708053, now seen corresponding path program 2 times [2024-06-28 03:26:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:03,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796846356] [2024-06-28 03:26:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:03,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:03,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:03,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796846356] [2024-06-28 03:26:03,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796846356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:03,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:03,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:26:03,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827048927] [2024-06-28 03:26:03,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:03,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:26:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:26:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:26:03,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:03,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 118 transitions, 1111 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:26:03,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:03,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:03,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:04,549 INFO L124 PetriNetUnfolderBase]: 2605/3996 cut-off events. [2024-06-28 03:26:04,549 INFO L125 PetriNetUnfolderBase]: For 100323/100323 co-relation queries the response was YES. [2024-06-28 03:26:04,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23421 conditions, 3996 events. 2605/3996 cut-off events. For 100323/100323 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20377 event pairs, 826 based on Foata normal form. 1/3996 useless extension candidates. Maximal degree in co-relation 23373. Up to 3871 conditions per place. [2024-06-28 03:26:04,574 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 111 selfloop transitions, 11 changer transitions 0/127 dead transitions. [2024-06-28 03:26:04,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 127 transitions, 1377 flow [2024-06-28 03:26:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:26:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:26:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:26:04,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:26:04,577 INFO L175 Difference]: Start difference. First operand has 110 places, 118 transitions, 1111 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:26:04,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 127 transitions, 1377 flow [2024-06-28 03:26:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 127 transitions, 1269 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:04,671 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 1031 flow [2024-06-28 03:26:04,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1031, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2024-06-28 03:26:04,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-28 03:26:04,672 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 1031 flow [2024-06-28 03:26:04,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:26:04,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:04,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:04,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:26:04,673 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:04,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:04,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1746849935, now seen corresponding path program 1 times [2024-06-28 03:26:04,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:04,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683361234] [2024-06-28 03:26:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:04,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:05,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:05,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683361234] [2024-06-28 03:26:05,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683361234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:05,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:05,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:26:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717573336] [2024-06-28 03:26:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:05,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:26:05,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:26:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:26:05,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:05,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 1031 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:26:05,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:05,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:05,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:06,023 INFO L124 PetriNetUnfolderBase]: 2610/4003 cut-off events. [2024-06-28 03:26:06,023 INFO L125 PetriNetUnfolderBase]: For 106626/106626 co-relation queries the response was YES. [2024-06-28 03:26:06,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23539 conditions, 4003 events. 2610/4003 cut-off events. For 106626/106626 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20337 event pairs, 836 based on Foata normal form. 1/4003 useless extension candidates. Maximal degree in co-relation 23490. Up to 3865 conditions per place. [2024-06-28 03:26:06,047 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 116 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2024-06-28 03:26:06,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 137 transitions, 1433 flow [2024-06-28 03:26:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:26:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:26:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:26:06,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 03:26:06,048 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 1031 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:26:06,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 137 transitions, 1433 flow [2024-06-28 03:26:06,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 1401 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:06,116 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 1099 flow [2024-06-28 03:26:06,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1099, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-28 03:26:06,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-28 03:26:06,117 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 1099 flow [2024-06-28 03:26:06,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:26:06,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:06,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:06,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:26:06,118 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:06,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2026721231, now seen corresponding path program 2 times [2024-06-28 03:26:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:06,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467840152] [2024-06-28 03:26:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:06,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:06,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467840152] [2024-06-28 03:26:06,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467840152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:06,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:06,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:26:06,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225186121] [2024-06-28 03:26:06,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:06,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:26:06,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:26:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:26:06,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:06,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 1099 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:26:06,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:06,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:06,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:07,412 INFO L124 PetriNetUnfolderBase]: 2607/4000 cut-off events. [2024-06-28 03:26:07,412 INFO L125 PetriNetUnfolderBase]: For 114641/114643 co-relation queries the response was YES. [2024-06-28 03:26:07,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24159 conditions, 4000 events. 2607/4000 cut-off events. For 114641/114643 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 20359 event pairs, 839 based on Foata normal form. 3/4002 useless extension candidates. Maximal degree in co-relation 24109. Up to 3862 conditions per place. [2024-06-28 03:26:07,440 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 112 selfloop transitions, 16 changer transitions 0/133 dead transitions. [2024-06-28 03:26:07,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 133 transitions, 1377 flow [2024-06-28 03:26:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:26:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:26:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 03:26:07,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-28 03:26:07,441 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 1099 flow. Second operand 6 states and 103 transitions. [2024-06-28 03:26:07,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 133 transitions, 1377 flow [2024-06-28 03:26:07,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 133 transitions, 1329 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-28 03:26:07,547 INFO L231 Difference]: Finished difference. Result has 116 places, 124 transitions, 1089 flow [2024-06-28 03:26:07,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1089, PETRI_PLACES=116, PETRI_TRANSITIONS=124} [2024-06-28 03:26:07,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-28 03:26:07,548 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 124 transitions, 1089 flow [2024-06-28 03:26:07,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-28 03:26:07,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:07,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:07,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:26:07,549 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:07,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1752571791, now seen corresponding path program 1 times [2024-06-28 03:26:07,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:07,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437103421] [2024-06-28 03:26:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:08,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:08,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437103421] [2024-06-28 03:26:08,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437103421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:08,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:08,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:08,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160715086] [2024-06-28 03:26:08,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:08,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:08,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:08,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:08,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 1089 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:08,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:08,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:08,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:09,052 INFO L124 PetriNetUnfolderBase]: 2730/4119 cut-off events. [2024-06-28 03:26:09,052 INFO L125 PetriNetUnfolderBase]: For 120342/120342 co-relation queries the response was YES. [2024-06-28 03:26:09,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24749 conditions, 4119 events. 2730/4119 cut-off events. For 120342/120342 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20334 event pairs, 876 based on Foata normal form. 3/4121 useless extension candidates. Maximal degree in co-relation 24697. Up to 4092 conditions per place. [2024-06-28 03:26:09,080 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 122 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2024-06-28 03:26:09,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 139 transitions, 1425 flow [2024-06-28 03:26:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 03:26:09,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 03:26:09,081 INFO L175 Difference]: Start difference. First operand has 116 places, 124 transitions, 1089 flow. Second operand 7 states and 110 transitions. [2024-06-28 03:26:09,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 139 transitions, 1425 flow [2024-06-28 03:26:09,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 139 transitions, 1379 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:26:09,159 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1119 flow [2024-06-28 03:26:09,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1119, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-28 03:26:09,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-28 03:26:09,160 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1119 flow [2024-06-28 03:26:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:09,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:09,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:09,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:26:09,161 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:09,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1859840723, now seen corresponding path program 1 times [2024-06-28 03:26:09,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:09,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793173879] [2024-06-28 03:26:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:09,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:09,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:09,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793173879] [2024-06-28 03:26:09,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793173879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:09,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:09,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:09,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164568700] [2024-06-28 03:26:09,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:09,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:09,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:10,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:10,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1119 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:10,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:10,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:10,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:10,521 INFO L124 PetriNetUnfolderBase]: 2616/4013 cut-off events. [2024-06-28 03:26:10,522 INFO L125 PetriNetUnfolderBase]: For 126804/126806 co-relation queries the response was YES. [2024-06-28 03:26:10,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24845 conditions, 4013 events. 2616/4013 cut-off events. For 126804/126806 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20353 event pairs, 826 based on Foata normal form. 4/4016 useless extension candidates. Maximal degree in co-relation 24793. Up to 3758 conditions per place. [2024-06-28 03:26:10,549 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 38 changer transitions 0/165 dead transitions. [2024-06-28 03:26:10,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1764 flow [2024-06-28 03:26:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 03:26:10,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-28 03:26:10,550 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1119 flow. Second operand 7 states and 136 transitions. [2024-06-28 03:26:10,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1764 flow [2024-06-28 03:26:10,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 165 transitions, 1710 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:10,633 INFO L231 Difference]: Finished difference. Result has 121 places, 141 transitions, 1350 flow [2024-06-28 03:26:10,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1350, PETRI_PLACES=121, PETRI_TRANSITIONS=141} [2024-06-28 03:26:10,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-28 03:26:10,634 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 141 transitions, 1350 flow [2024-06-28 03:26:10,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:10,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:10,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:10,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:26:10,635 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)] === [2024-06-28 03:26:10,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash 66337593, now seen corresponding path program 1 times [2024-06-28 03:26:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:10,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444587152] [2024-06-28 03:26:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:11,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:11,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444587152] [2024-06-28 03:26:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444587152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:11,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:11,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:11,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201994794] [2024-06-28 03:26:11,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:11,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:11,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:11,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:11,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:11,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:11,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 141 transitions, 1350 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:11,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:11,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:11,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:12,768 INFO L124 PetriNetUnfolderBase]: 2672/4099 cut-off events. [2024-06-28 03:26:12,768 INFO L125 PetriNetUnfolderBase]: For 138251/138253 co-relation queries the response was YES. [2024-06-28 03:26:12,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26357 conditions, 4099 events. 2672/4099 cut-off events. For 138251/138253 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 20842 event pairs, 773 based on Foata normal form. 4/4102 useless extension candidates. Maximal degree in co-relation 26302. Up to 3652 conditions per place. [2024-06-28 03:26:12,798 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 40 changer transitions 0/179 dead transitions. [2024-06-28 03:26:12,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 179 transitions, 1884 flow [2024-06-28 03:26:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:26:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:26:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:26:12,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:26:12,799 INFO L175 Difference]: Start difference. First operand has 121 places, 141 transitions, 1350 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:26:12,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 179 transitions, 1884 flow [2024-06-28 03:26:12,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 179 transitions, 1810 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-28 03:26:12,900 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1507 flow [2024-06-28 03:26:12,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1507, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-28 03:26:12,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-28 03:26:12,901 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1507 flow [2024-06-28 03:26:12,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:12,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:12,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:12,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:26:12,901 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:12,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1859542193, now seen corresponding path program 2 times [2024-06-28 03:26:12,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:12,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197460881] [2024-06-28 03:26:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:12,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:13,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:13,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197460881] [2024-06-28 03:26:13,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197460881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:13,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:13,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:13,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626412997] [2024-06-28 03:26:13,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:13,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:13,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:13,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:13,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1507 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:13,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:13,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:13,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:14,434 INFO L124 PetriNetUnfolderBase]: 2700/4138 cut-off events. [2024-06-28 03:26:14,434 INFO L125 PetriNetUnfolderBase]: For 147394/147396 co-relation queries the response was YES. [2024-06-28 03:26:14,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27275 conditions, 4138 events. 2700/4138 cut-off events. For 147394/147396 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21089 event pairs, 838 based on Foata normal form. 4/4141 useless extension candidates. Maximal degree in co-relation 27216. Up to 3872 conditions per place. [2024-06-28 03:26:14,467 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 42 changer transitions 0/175 dead transitions. [2024-06-28 03:26:14,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 175 transitions, 2111 flow [2024-06-28 03:26:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 03:26:14,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 03:26:14,468 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1507 flow. Second operand 7 states and 130 transitions. [2024-06-28 03:26:14,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 175 transitions, 2111 flow [2024-06-28 03:26:14,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 175 transitions, 2053 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 03:26:14,604 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1659 flow [2024-06-28 03:26:14,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1659, PETRI_PLACES=135, PETRI_TRANSITIONS=157} [2024-06-28 03:26:14,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-28 03:26:14,604 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1659 flow [2024-06-28 03:26:14,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:14,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:14,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:14,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:26:14,605 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:14,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1859541821, now seen corresponding path program 1 times [2024-06-28 03:26:14,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:14,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449949179] [2024-06-28 03:26:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:14,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449949179] [2024-06-28 03:26:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449949179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:15,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:15,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313672867] [2024-06-28 03:26:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:15,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:15,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:15,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 157 transitions, 1659 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:15,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:15,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:15,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:16,018 INFO L124 PetriNetUnfolderBase]: 2837/4276 cut-off events. [2024-06-28 03:26:16,018 INFO L125 PetriNetUnfolderBase]: For 154928/154928 co-relation queries the response was YES. [2024-06-28 03:26:16,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28343 conditions, 4276 events. 2837/4276 cut-off events. For 154928/154928 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21220 event pairs, 878 based on Foata normal form. 1/4276 useless extension candidates. Maximal degree in co-relation 28281. Up to 4228 conditions per place. [2024-06-28 03:26:16,054 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 154 selfloop transitions, 23 changer transitions 0/180 dead transitions. [2024-06-28 03:26:16,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 180 transitions, 2213 flow [2024-06-28 03:26:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:26:16,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:26:16,056 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1659 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:26:16,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 180 transitions, 2213 flow [2024-06-28 03:26:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 180 transitions, 2134 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:16,233 INFO L231 Difference]: Finished difference. Result has 139 places, 163 transitions, 1734 flow [2024-06-28 03:26:16,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1734, PETRI_PLACES=139, PETRI_TRANSITIONS=163} [2024-06-28 03:26:16,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-28 03:26:16,234 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 163 transitions, 1734 flow [2024-06-28 03:26:16,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:16,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:16,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:16,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:26:16,234 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)] === [2024-06-28 03:26:16,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:16,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1738265465, now seen corresponding path program 2 times [2024-06-28 03:26:16,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:16,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442359525] [2024-06-28 03:26:16,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:16,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:17,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442359525] [2024-06-28 03:26:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442359525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:17,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:17,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159122622] [2024-06-28 03:26:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:17,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:17,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 163 transitions, 1734 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:17,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:17,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:17,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:18,027 INFO L124 PetriNetUnfolderBase]: 2751/4211 cut-off events. [2024-06-28 03:26:18,027 INFO L125 PetriNetUnfolderBase]: For 169427/169429 co-relation queries the response was YES. [2024-06-28 03:26:18,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28584 conditions, 4211 events. 2751/4211 cut-off events. For 169427/169429 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21519 event pairs, 763 based on Foata normal form. 8/4218 useless extension candidates. Maximal degree in co-relation 28521. Up to 3611 conditions per place. [2024-06-28 03:26:18,066 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 135 selfloop transitions, 54 changer transitions 0/196 dead transitions. [2024-06-28 03:26:18,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 196 transitions, 2404 flow [2024-06-28 03:26:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 03:26:18,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-28 03:26:18,068 INFO L175 Difference]: Start difference. First operand has 139 places, 163 transitions, 1734 flow. Second operand 7 states and 137 transitions. [2024-06-28 03:26:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 196 transitions, 2404 flow [2024-06-28 03:26:18,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 196 transitions, 2348 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:18,245 INFO L231 Difference]: Finished difference. Result has 144 places, 169 transitions, 1944 flow [2024-06-28 03:26:18,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1944, PETRI_PLACES=144, PETRI_TRANSITIONS=169} [2024-06-28 03:26:18,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-28 03:26:18,245 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 169 transitions, 1944 flow [2024-06-28 03:26:18,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:18,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:18,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:18,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:26:18,246 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)] === [2024-06-28 03:26:18,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 543636466, now seen corresponding path program 1 times [2024-06-28 03:26:18,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:18,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655074598] [2024-06-28 03:26:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:18,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:19,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:19,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655074598] [2024-06-28 03:26:19,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655074598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:19,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:19,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:26:19,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106133879] [2024-06-28 03:26:19,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:19,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:26:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:26:19,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:26:19,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:19,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 169 transitions, 1944 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-28 03:26:19,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:19,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:19,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:19,972 INFO L124 PetriNetUnfolderBase]: 2746/4204 cut-off events. [2024-06-28 03:26:19,972 INFO L125 PetriNetUnfolderBase]: For 177649/177651 co-relation queries the response was YES. [2024-06-28 03:26:19,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29424 conditions, 4204 events. 2746/4204 cut-off events. For 177649/177651 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21440 event pairs, 779 based on Foata normal form. 2/4205 useless extension candidates. Maximal degree in co-relation 29358. Up to 3762 conditions per place. [2024-06-28 03:26:20,007 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 50 changer transitions 0/201 dead transitions. [2024-06-28 03:26:20,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 201 transitions, 2424 flow [2024-06-28 03:26:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 03:26:20,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-28 03:26:20,008 INFO L175 Difference]: Start difference. First operand has 144 places, 169 transitions, 1944 flow. Second operand 7 states and 146 transitions. [2024-06-28 03:26:20,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 201 transitions, 2424 flow [2024-06-28 03:26:20,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 201 transitions, 2296 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:20,257 INFO L231 Difference]: Finished difference. Result has 148 places, 169 transitions, 1931 flow [2024-06-28 03:26:20,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1931, PETRI_PLACES=148, PETRI_TRANSITIONS=169} [2024-06-28 03:26:20,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-28 03:26:20,257 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 169 transitions, 1931 flow [2024-06-28 03:26:20,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-28 03:26:20,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:20,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:20,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:26:20,258 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)] === [2024-06-28 03:26:20,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:20,258 INFO L85 PathProgramCache]: Analyzing trace with hash 552840893, now seen corresponding path program 3 times [2024-06-28 03:26:20,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:20,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161784206] [2024-06-28 03:26:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:20,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:21,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:21,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161784206] [2024-06-28 03:26:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161784206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:21,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:21,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:21,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754470072] [2024-06-28 03:26:21,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:21,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:21,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:21,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:21,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:21,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:21,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 1931 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:21,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:21,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:21,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:21,875 INFO L124 PetriNetUnfolderBase]: 2738/4192 cut-off events. [2024-06-28 03:26:21,875 INFO L125 PetriNetUnfolderBase]: For 174573/174575 co-relation queries the response was YES. [2024-06-28 03:26:21,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29113 conditions, 4192 events. 2738/4192 cut-off events. For 174573/174575 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21357 event pairs, 817 based on Foata normal form. 4/4195 useless extension candidates. Maximal degree in co-relation 29045. Up to 3979 conditions per place. [2024-06-28 03:26:21,911 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 169 selfloop transitions, 17 changer transitions 0/193 dead transitions. [2024-06-28 03:26:21,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 193 transitions, 2395 flow [2024-06-28 03:26:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 03:26:21,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 03:26:21,913 INFO L175 Difference]: Start difference. First operand has 148 places, 169 transitions, 1931 flow. Second operand 7 states and 127 transitions. [2024-06-28 03:26:21,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 193 transitions, 2395 flow [2024-06-28 03:26:22,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 193 transitions, 2284 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:26:22,220 INFO L231 Difference]: Finished difference. Result has 149 places, 171 transitions, 1903 flow [2024-06-28 03:26:22,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1903, PETRI_PLACES=149, PETRI_TRANSITIONS=171} [2024-06-28 03:26:22,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-28 03:26:22,221 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 171 transitions, 1903 flow [2024-06-28 03:26:22,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:22,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:22,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:22,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:26:22,221 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)] === [2024-06-28 03:26:22,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash 543636683, now seen corresponding path program 4 times [2024-06-28 03:26:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:22,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047767032] [2024-06-28 03:26:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:23,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047767032] [2024-06-28 03:26:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047767032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:23,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:23,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:23,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356974704] [2024-06-28 03:26:23,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:23,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:23,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:23,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:23,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:23,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 171 transitions, 1903 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:23,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:23,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:23,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:24,042 INFO L124 PetriNetUnfolderBase]: 2730/4180 cut-off events. [2024-06-28 03:26:24,042 INFO L125 PetriNetUnfolderBase]: For 182473/182475 co-relation queries the response was YES. [2024-06-28 03:26:24,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29133 conditions, 4180 events. 2730/4180 cut-off events. For 182473/182475 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21267 event pairs, 781 based on Foata normal form. 4/4183 useless extension candidates. Maximal degree in co-relation 29064. Up to 3755 conditions per place. [2024-06-28 03:26:24,074 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 144 selfloop transitions, 48 changer transitions 0/199 dead transitions. [2024-06-28 03:26:24,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 199 transitions, 2361 flow [2024-06-28 03:26:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 03:26:24,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 03:26:24,075 INFO L175 Difference]: Start difference. First operand has 149 places, 171 transitions, 1903 flow. Second operand 7 states and 140 transitions. [2024-06-28 03:26:24,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 199 transitions, 2361 flow [2024-06-28 03:26:24,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 199 transitions, 2282 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:24,312 INFO L231 Difference]: Finished difference. Result has 151 places, 171 transitions, 1932 flow [2024-06-28 03:26:24,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=151, PETRI_TRANSITIONS=171} [2024-06-28 03:26:24,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-28 03:26:24,313 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 171 transitions, 1932 flow [2024-06-28 03:26:24,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:24,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:24,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:24,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:26:24,313 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:24,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:24,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1504863071, now seen corresponding path program 2 times [2024-06-28 03:26:24,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:24,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300398381] [2024-06-28 03:26:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:24,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300398381] [2024-06-28 03:26:24,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300398381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:24,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:24,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:24,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077300573] [2024-06-28 03:26:24,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:24,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:24,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:25,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:25,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 171 transitions, 1932 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:25,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:25,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:25,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:25,729 INFO L124 PetriNetUnfolderBase]: 2855/4306 cut-off events. [2024-06-28 03:26:25,729 INFO L125 PetriNetUnfolderBase]: For 189481/189481 co-relation queries the response was YES. [2024-06-28 03:26:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30129 conditions, 4306 events. 2855/4306 cut-off events. For 189481/189481 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21428 event pairs, 871 based on Foata normal form. 1/4306 useless extension candidates. Maximal degree in co-relation 30059. Up to 4285 conditions per place. [2024-06-28 03:26:25,763 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 167 selfloop transitions, 14 changer transitions 0/184 dead transitions. [2024-06-28 03:26:25,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 184 transitions, 2372 flow [2024-06-28 03:26:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 03:26:25,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-28 03:26:25,764 INFO L175 Difference]: Start difference. First operand has 151 places, 171 transitions, 1932 flow. Second operand 7 states and 108 transitions. [2024-06-28 03:26:25,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 184 transitions, 2372 flow [2024-06-28 03:26:25,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 184 transitions, 2257 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:26:25,957 INFO L231 Difference]: Finished difference. Result has 152 places, 174 transitions, 1911 flow [2024-06-28 03:26:25,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1911, PETRI_PLACES=152, PETRI_TRANSITIONS=174} [2024-06-28 03:26:25,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-28 03:26:25,958 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 174 transitions, 1911 flow [2024-06-28 03:26:25,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:25,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:25,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:26:25,959 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:25,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1280038519, now seen corresponding path program 3 times [2024-06-28 03:26:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:25,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976639576] [2024-06-28 03:26:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:26,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:26,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976639576] [2024-06-28 03:26:26,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976639576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:26,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:26,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:26,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562867394] [2024-06-28 03:26:26,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:26,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:26,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:26,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 174 transitions, 1911 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:26,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:26,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:27,426 INFO L124 PetriNetUnfolderBase]: 2731/4182 cut-off events. [2024-06-28 03:26:27,426 INFO L125 PetriNetUnfolderBase]: For 198758/198760 co-relation queries the response was YES. [2024-06-28 03:26:27,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29469 conditions, 4182 events. 2731/4182 cut-off events. For 198758/198760 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21298 event pairs, 834 based on Foata normal form. 4/4185 useless extension candidates. Maximal degree in co-relation 29398. Up to 4018 conditions per place. [2024-06-28 03:26:27,461 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 25 changer transitions 0/185 dead transitions. [2024-06-28 03:26:27,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 185 transitions, 2363 flow [2024-06-28 03:26:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:26:27,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 03:26:27,462 INFO L175 Difference]: Start difference. First operand has 152 places, 174 transitions, 1911 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:26:27,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 185 transitions, 2363 flow [2024-06-28 03:26:27,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 185 transitions, 2279 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:27,701 INFO L231 Difference]: Finished difference. Result has 154 places, 174 transitions, 1885 flow [2024-06-28 03:26:27,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1885, PETRI_PLACES=154, PETRI_TRANSITIONS=174} [2024-06-28 03:26:27,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:26:27,702 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 174 transitions, 1885 flow [2024-06-28 03:26:27,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:27,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:27,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:27,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:26:27,702 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:27,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:27,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1069560871, now seen corresponding path program 3 times [2024-06-28 03:26:27,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:27,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400703619] [2024-06-28 03:26:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:27,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:28,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:28,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400703619] [2024-06-28 03:26:28,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400703619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:28,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:28,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:28,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691077638] [2024-06-28 03:26:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:28,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:28,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:28,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:28,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 174 transitions, 1885 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:28,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:28,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:28,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:29,246 INFO L124 PetriNetUnfolderBase]: 2848/4297 cut-off events. [2024-06-28 03:26:29,247 INFO L125 PetriNetUnfolderBase]: For 205985/205985 co-relation queries the response was YES. [2024-06-28 03:26:29,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30193 conditions, 4297 events. 2848/4297 cut-off events. For 205985/205985 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21398 event pairs, 874 based on Foata normal form. 1/4297 useless extension candidates. Maximal degree in co-relation 30121. Up to 4270 conditions per place. [2024-06-28 03:26:29,290 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 162 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-28 03:26:29,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 184 transitions, 2271 flow [2024-06-28 03:26:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 03:26:29,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-28 03:26:29,291 INFO L175 Difference]: Start difference. First operand has 154 places, 174 transitions, 1885 flow. Second operand 7 states and 110 transitions. [2024-06-28 03:26:29,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 184 transitions, 2271 flow [2024-06-28 03:26:29,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 184 transitions, 2150 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:29,535 INFO L231 Difference]: Finished difference. Result has 154 places, 174 transitions, 1808 flow [2024-06-28 03:26:29,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1808, PETRI_PLACES=154, PETRI_TRANSITIONS=174} [2024-06-28 03:26:29,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:26:29,536 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 174 transitions, 1808 flow [2024-06-28 03:26:29,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:29,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:29,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:29,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:26:29,537 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:29,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1682345945, now seen corresponding path program 1 times [2024-06-28 03:26:29,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103848955] [2024-06-28 03:26:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:29,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:30,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103848955] [2024-06-28 03:26:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103848955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:30,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:30,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:30,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098808856] [2024-06-28 03:26:30,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:30,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:30,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 174 transitions, 1808 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:30,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:30,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:30,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:31,126 INFO L124 PetriNetUnfolderBase]: 2738/4191 cut-off events. [2024-06-28 03:26:31,126 INFO L125 PetriNetUnfolderBase]: For 217289/217289 co-relation queries the response was YES. [2024-06-28 03:26:31,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29778 conditions, 4191 events. 2738/4191 cut-off events. For 217289/217289 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21318 event pairs, 829 based on Foata normal form. 2/4192 useless extension candidates. Maximal degree in co-relation 29708. Up to 4034 conditions per place. [2024-06-28 03:26:31,159 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 16 changer transitions 0/194 dead transitions. [2024-06-28 03:26:31,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 194 transitions, 2262 flow [2024-06-28 03:26:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 03:26:31,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 03:26:31,160 INFO L175 Difference]: Start difference. First operand has 154 places, 174 transitions, 1808 flow. Second operand 7 states and 122 transitions. [2024-06-28 03:26:31,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 194 transitions, 2262 flow [2024-06-28 03:26:31,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 194 transitions, 2164 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:31,330 INFO L231 Difference]: Finished difference. Result has 154 places, 177 transitions, 1793 flow [2024-06-28 03:26:31,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1793, PETRI_PLACES=154, PETRI_TRANSITIONS=177} [2024-06-28 03:26:31,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-28 03:26:31,331 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 177 transitions, 1793 flow [2024-06-28 03:26:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:31,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:31,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:26:31,332 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:31,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1511523545, now seen corresponding path program 2 times [2024-06-28 03:26:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:31,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692449330] [2024-06-28 03:26:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692449330] [2024-06-28 03:26:31,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692449330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:31,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:31,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:31,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534400949] [2024-06-28 03:26:31,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:31,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:31,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:31,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:31,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:32,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:32,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 177 transitions, 1793 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:32,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:32,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:32,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:32,920 INFO L124 PetriNetUnfolderBase]: 2748/4205 cut-off events. [2024-06-28 03:26:32,920 INFO L125 PetriNetUnfolderBase]: For 227195/227195 co-relation queries the response was YES. [2024-06-28 03:26:32,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30251 conditions, 4205 events. 2748/4205 cut-off events. For 227195/227195 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21403 event pairs, 830 based on Foata normal form. 2/4206 useless extension candidates. Maximal degree in co-relation 30181. Up to 4024 conditions per place. [2024-06-28 03:26:32,950 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 164 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-28 03:26:32,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 200 transitions, 2389 flow [2024-06-28 03:26:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:26:32,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 03:26:32,952 INFO L175 Difference]: Start difference. First operand has 154 places, 177 transitions, 1793 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:26:32,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 200 transitions, 2389 flow [2024-06-28 03:26:33,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 200 transitions, 2332 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:33,201 INFO L231 Difference]: Finished difference. Result has 156 places, 183 transitions, 1892 flow [2024-06-28 03:26:33,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1892, PETRI_PLACES=156, PETRI_TRANSITIONS=183} [2024-06-28 03:26:33,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-28 03:26:33,202 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 183 transitions, 1892 flow [2024-06-28 03:26:33,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:33,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:33,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:33,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:26:33,203 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:33,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1682225789, now seen corresponding path program 1 times [2024-06-28 03:26:33,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966760353] [2024-06-28 03:26:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:33,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:33,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966760353] [2024-06-28 03:26:33,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966760353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:33,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:33,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005058053] [2024-06-28 03:26:33,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:33,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:33,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:33,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 183 transitions, 1892 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:33,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:33,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:33,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:34,732 INFO L124 PetriNetUnfolderBase]: 2873/4332 cut-off events. [2024-06-28 03:26:34,733 INFO L125 PetriNetUnfolderBase]: For 237610/237610 co-relation queries the response was YES. [2024-06-28 03:26:34,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31456 conditions, 4332 events. 2873/4332 cut-off events. For 237610/237610 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21554 event pairs, 874 based on Foata normal form. 1/4332 useless extension candidates. Maximal degree in co-relation 31385. Up to 4290 conditions per place. [2024-06-28 03:26:34,770 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 177 selfloop transitions, 23 changer transitions 0/203 dead transitions. [2024-06-28 03:26:34,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 203 transitions, 2478 flow [2024-06-28 03:26:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:26:34,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:26:34,771 INFO L175 Difference]: Start difference. First operand has 156 places, 183 transitions, 1892 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:26:34,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 203 transitions, 2478 flow [2024-06-28 03:26:34,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 203 transitions, 2423 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:34,962 INFO L231 Difference]: Finished difference. Result has 160 places, 189 transitions, 1967 flow [2024-06-28 03:26:34,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1967, PETRI_PLACES=160, PETRI_TRANSITIONS=189} [2024-06-28 03:26:34,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-28 03:26:34,963 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 189 transitions, 1967 flow [2024-06-28 03:26:34,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:34,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:34,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:34,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:26:34,964 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:34,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1596389503, now seen corresponding path program 2 times [2024-06-28 03:26:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:34,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078693570] [2024-06-28 03:26:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:35,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078693570] [2024-06-28 03:26:35,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078693570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:35,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:35,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986642666] [2024-06-28 03:26:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:35,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:35,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:35,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 189 transitions, 1967 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:35,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:35,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:35,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:36,530 INFO L124 PetriNetUnfolderBase]: 2878/4340 cut-off events. [2024-06-28 03:26:36,530 INFO L125 PetriNetUnfolderBase]: For 249538/249540 co-relation queries the response was YES. [2024-06-28 03:26:36,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32127 conditions, 4340 events. 2878/4340 cut-off events. For 249538/249540 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21608 event pairs, 876 based on Foata normal form. 3/4342 useless extension candidates. Maximal degree in co-relation 32054. Up to 4296 conditions per place. [2024-06-28 03:26:36,571 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 27 changer transitions 0/203 dead transitions. [2024-06-28 03:26:36,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 203 transitions, 2517 flow [2024-06-28 03:26:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 03:26:36,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:26:36,572 INFO L175 Difference]: Start difference. First operand has 160 places, 189 transitions, 1967 flow. Second operand 7 states and 112 transitions. [2024-06-28 03:26:36,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 203 transitions, 2517 flow [2024-06-28 03:26:36,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 203 transitions, 2465 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:36,855 INFO L231 Difference]: Finished difference. Result has 164 places, 192 transitions, 2017 flow [2024-06-28 03:26:36,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2017, PETRI_PLACES=164, PETRI_TRANSITIONS=192} [2024-06-28 03:26:36,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-28 03:26:36,856 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 192 transitions, 2017 flow [2024-06-28 03:26:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:36,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:36,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:36,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:26:36,857 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:36,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash -240892903, now seen corresponding path program 3 times [2024-06-28 03:26:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444578426] [2024-06-28 03:26:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444578426] [2024-06-28 03:26:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444578426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:37,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408313165] [2024-06-28 03:26:37,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:37,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:37,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:37,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:37,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 192 transitions, 2017 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:37,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:37,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:37,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:38,436 INFO L124 PetriNetUnfolderBase]: 2764/4224 cut-off events. [2024-06-28 03:26:38,436 INFO L125 PetriNetUnfolderBase]: For 260767/260769 co-relation queries the response was YES. [2024-06-28 03:26:38,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31782 conditions, 4224 events. 2764/4224 cut-off events. For 260767/260769 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 21430 event pairs, 845 based on Foata normal form. 2/4225 useless extension candidates. Maximal degree in co-relation 31707. Up to 4041 conditions per place. [2024-06-28 03:26:38,473 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 165 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2024-06-28 03:26:38,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 204 transitions, 2435 flow [2024-06-28 03:26:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 03:26:38,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 03:26:38,475 INFO L175 Difference]: Start difference. First operand has 164 places, 192 transitions, 2017 flow. Second operand 7 states and 121 transitions. [2024-06-28 03:26:38,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 204 transitions, 2435 flow [2024-06-28 03:26:38,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 204 transitions, 2341 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 03:26:38,805 INFO L231 Difference]: Finished difference. Result has 167 places, 192 transitions, 1985 flow [2024-06-28 03:26:38,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1985, PETRI_PLACES=167, PETRI_TRANSITIONS=192} [2024-06-28 03:26:38,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-28 03:26:38,806 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 192 transitions, 1985 flow [2024-06-28 03:26:38,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:38,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:38,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:26:38,806 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:38,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1069745383, now seen corresponding path program 3 times [2024-06-28 03:26:38,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:38,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547202586] [2024-06-28 03:26:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:39,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:39,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547202586] [2024-06-28 03:26:39,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547202586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:39,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:39,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:39,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617837302] [2024-06-28 03:26:39,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:39,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:39,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:39,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:39,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:39,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:39,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 192 transitions, 1985 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:39,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:39,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:40,335 INFO L124 PetriNetUnfolderBase]: 2869/4328 cut-off events. [2024-06-28 03:26:40,335 INFO L125 PetriNetUnfolderBase]: For 268217/268219 co-relation queries the response was YES. [2024-06-28 03:26:40,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32434 conditions, 4328 events. 2869/4328 cut-off events. For 268217/268219 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 21552 event pairs, 875 based on Foata normal form. 3/4330 useless extension candidates. Maximal degree in co-relation 32358. Up to 4285 conditions per place. [2024-06-28 03:26:40,375 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 26 changer transitions 0/202 dead transitions. [2024-06-28 03:26:40,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 202 transitions, 2407 flow [2024-06-28 03:26:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:26:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:26:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 03:26:40,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:26:40,377 INFO L175 Difference]: Start difference. First operand has 167 places, 192 transitions, 1985 flow. Second operand 7 states and 112 transitions. [2024-06-28 03:26:40,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 202 transitions, 2407 flow [2024-06-28 03:26:40,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 202 transitions, 2311 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 03:26:40,729 INFO L231 Difference]: Finished difference. Result has 168 places, 192 transitions, 1947 flow [2024-06-28 03:26:40,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1947, PETRI_PLACES=168, PETRI_TRANSITIONS=192} [2024-06-28 03:26:40,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-28 03:26:40,729 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 192 transitions, 1947 flow [2024-06-28 03:26:40,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-28 03:26:40,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:40,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:40,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:26:40,730 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:40,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1820755602, now seen corresponding path program 1 times [2024-06-28 03:26:40,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:40,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315238353] [2024-06-28 03:26:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:41,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315238353] [2024-06-28 03:26:41,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315238353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:41,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:41,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:26:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119319158] [2024-06-28 03:26:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:26:41,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:26:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:26:41,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:41,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 192 transitions, 1947 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:41,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:41,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:41,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:42,451 INFO L124 PetriNetUnfolderBase]: 2779/4245 cut-off events. [2024-06-28 03:26:42,451 INFO L125 PetriNetUnfolderBase]: For 282613/282615 co-relation queries the response was YES. [2024-06-28 03:26:42,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32327 conditions, 4245 events. 2779/4245 cut-off events. For 282613/282615 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21594 event pairs, 827 based on Foata normal form. 4/4248 useless extension candidates. Maximal degree in co-relation 32250. Up to 3928 conditions per place. [2024-06-28 03:26:42,488 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 57 changer transitions 0/233 dead transitions. [2024-06-28 03:26:42,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 233 transitions, 2771 flow [2024-06-28 03:26:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:26:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:26:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:26:42,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-28 03:26:42,490 INFO L175 Difference]: Start difference. First operand has 168 places, 192 transitions, 1947 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:26:42,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 233 transitions, 2771 flow [2024-06-28 03:26:42,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 233 transitions, 2697 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:42,838 INFO L231 Difference]: Finished difference. Result has 170 places, 202 transitions, 2143 flow [2024-06-28 03:26:42,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2143, PETRI_PLACES=170, PETRI_TRANSITIONS=202} [2024-06-28 03:26:42,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 03:26:42,839 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 202 transitions, 2143 flow [2024-06-28 03:26:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:42,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:42,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:42,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:26:42,839 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)] === [2024-06-28 03:26:42,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1132308208, now seen corresponding path program 1 times [2024-06-28 03:26:42,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:42,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379980703] [2024-06-28 03:26:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:42,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379980703] [2024-06-28 03:26:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379980703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:44,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:26:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91066398] [2024-06-28 03:26:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:44,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:26:44,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:26:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:26:44,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:44,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 202 transitions, 2143 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:44,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:44,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:44,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:45,135 INFO L124 PetriNetUnfolderBase]: 2820/4316 cut-off events. [2024-06-28 03:26:45,136 INFO L125 PetriNetUnfolderBase]: For 304250/304252 co-relation queries the response was YES. [2024-06-28 03:26:45,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33699 conditions, 4316 events. 2820/4316 cut-off events. For 304250/304252 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22064 event pairs, 767 based on Foata normal form. 12/4327 useless extension candidates. Maximal degree in co-relation 33620. Up to 3836 conditions per place. [2024-06-28 03:26:45,176 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 44 changer transitions 0/239 dead transitions. [2024-06-28 03:26:45,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 239 transitions, 2729 flow [2024-06-28 03:26:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:26:45,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:26:45,177 INFO L175 Difference]: Start difference. First operand has 170 places, 202 transitions, 2143 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:26:45,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 239 transitions, 2729 flow [2024-06-28 03:26:45,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 239 transitions, 2598 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 03:26:45,647 INFO L231 Difference]: Finished difference. Result has 175 places, 203 transitions, 2140 flow [2024-06-28 03:26:45,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2140, PETRI_PLACES=175, PETRI_TRANSITIONS=203} [2024-06-28 03:26:45,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-28 03:26:45,648 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 203 transitions, 2140 flow [2024-06-28 03:26:45,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:45,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:45,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:45,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:26:45,649 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:45,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1820486491, now seen corresponding path program 1 times [2024-06-28 03:26:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:45,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93514959] [2024-06-28 03:26:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:45,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:46,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93514959] [2024-06-28 03:26:46,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93514959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:46,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:46,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:26:46,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819584832] [2024-06-28 03:26:46,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:46,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:26:46,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:26:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:26:46,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:26:46,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 203 transitions, 2140 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) [2024-06-28 03:26:46,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:46,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:26:46,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:47,285 INFO L124 PetriNetUnfolderBase]: 2946/4449 cut-off events. [2024-06-28 03:26:47,285 INFO L125 PetriNetUnfolderBase]: For 310553/310555 co-relation queries the response was YES. [2024-06-28 03:26:47,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34771 conditions, 4449 events. 2946/4449 cut-off events. For 310553/310555 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22378 event pairs, 878 based on Foata normal form. 4/4452 useless extension candidates. Maximal degree in co-relation 34690. Up to 4210 conditions per place. [2024-06-28 03:26:47,325 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 67 changer transitions 0/240 dead transitions. [2024-06-28 03:26:47,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 240 transitions, 3032 flow [2024-06-28 03:26:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:26:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:26:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:26:47,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 03:26:47,326 INFO L175 Difference]: Start difference. First operand has 175 places, 203 transitions, 2140 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:26:47,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 240 transitions, 3032 flow [2024-06-28 03:26:47,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 240 transitions, 2922 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:47,728 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2392 flow [2024-06-28 03:26:47,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2392, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2024-06-28 03:26:47,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-28 03:26:47,729 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2392 flow [2024-06-28 03:26:47,729 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) [2024-06-28 03:26:47,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:47,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:47,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:26:47,729 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:47,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash 701748038, now seen corresponding path program 2 times [2024-06-28 03:26:47,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879003070] [2024-06-28 03:26:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:47,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:48,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:48,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879003070] [2024-06-28 03:26:48,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879003070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:48,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:48,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:26:48,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225841601] [2024-06-28 03:26:48,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:48,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:26:48,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:26:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:26:48,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:48,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2392 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:48,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:48,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:48,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:49,668 INFO L124 PetriNetUnfolderBase]: 2960/4528 cut-off events. [2024-06-28 03:26:49,668 INFO L125 PetriNetUnfolderBase]: For 331280/331282 co-relation queries the response was YES. [2024-06-28 03:26:49,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36415 conditions, 4528 events. 2960/4528 cut-off events. For 331280/331282 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23346 event pairs, 1393 based on Foata normal form. 4/4531 useless extension candidates. Maximal degree in co-relation 36332. Up to 4237 conditions per place. [2024-06-28 03:26:49,710 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 53 changer transitions 0/266 dead transitions. [2024-06-28 03:26:49,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 266 transitions, 3450 flow [2024-06-28 03:26:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 03:26:49,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 03:26:49,712 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2392 flow. Second operand 9 states and 155 transitions. [2024-06-28 03:26:49,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 266 transitions, 3450 flow [2024-06-28 03:26:50,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 266 transitions, 3345 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:50,440 INFO L231 Difference]: Finished difference. Result has 187 places, 243 transitions, 2876 flow [2024-06-28 03:26:50,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2876, PETRI_PLACES=187, PETRI_TRANSITIONS=243} [2024-06-28 03:26:50,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 03:26:50,441 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 243 transitions, 2876 flow [2024-06-28 03:26:50,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:50,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:50,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:50,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:26:50,441 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:50,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1009164764, now seen corresponding path program 3 times [2024-06-28 03:26:50,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:50,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606911004] [2024-06-28 03:26:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:50,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:51,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:51,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606911004] [2024-06-28 03:26:51,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606911004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:51,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212860717] [2024-06-28 03:26:51,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:51,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:51,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:51,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:51,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 243 transitions, 2876 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:51,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:51,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:51,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:52,551 INFO L124 PetriNetUnfolderBase]: 3033/4624 cut-off events. [2024-06-28 03:26:52,551 INFO L125 PetriNetUnfolderBase]: For 343862/343870 co-relation queries the response was YES. [2024-06-28 03:26:52,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37798 conditions, 4624 events. 3033/4624 cut-off events. For 343862/343870 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 23798 event pairs, 847 based on Foata normal form. 10/4633 useless extension candidates. Maximal degree in co-relation 37709. Up to 4219 conditions per place. [2024-06-28 03:26:52,602 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 94 changer transitions 0/295 dead transitions. [2024-06-28 03:26:52,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 295 transitions, 3966 flow [2024-06-28 03:26:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:26:52,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 03:26:52,603 INFO L175 Difference]: Start difference. First operand has 187 places, 243 transitions, 2876 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:26:52,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 295 transitions, 3966 flow [2024-06-28 03:26:53,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 295 transitions, 3875 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 03:26:53,080 INFO L231 Difference]: Finished difference. Result has 196 places, 269 transitions, 3420 flow [2024-06-28 03:26:53,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3420, PETRI_PLACES=196, PETRI_TRANSITIONS=269} [2024-06-28 03:26:53,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-28 03:26:53,081 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 269 transitions, 3420 flow [2024-06-28 03:26:53,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:53,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:53,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:26:53,081 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:53,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash 904095210, now seen corresponding path program 4 times [2024-06-28 03:26:53,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:53,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807938214] [2024-06-28 03:26:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:54,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807938214] [2024-06-28 03:26:54,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807938214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:54,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:54,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:54,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597988758] [2024-06-28 03:26:54,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:54,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:54,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:54,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:54,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:54,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:54,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 269 transitions, 3420 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:54,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:54,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:54,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:55,325 INFO L124 PetriNetUnfolderBase]: 3155/4810 cut-off events. [2024-06-28 03:26:55,325 INFO L125 PetriNetUnfolderBase]: For 364433/364439 co-relation queries the response was YES. [2024-06-28 03:26:55,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40258 conditions, 4810 events. 3155/4810 cut-off events. For 364433/364439 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25049 event pairs, 1068 based on Foata normal form. 8/4817 useless extension candidates. Maximal degree in co-relation 40165. Up to 4316 conditions per place. [2024-06-28 03:26:55,373 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 215 selfloop transitions, 115 changer transitions 0/344 dead transitions. [2024-06-28 03:26:55,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 344 transitions, 5194 flow [2024-06-28 03:26:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:26:55,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:26:55,374 INFO L175 Difference]: Start difference. First operand has 196 places, 269 transitions, 3420 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:26:55,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 344 transitions, 5194 flow [2024-06-28 03:26:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 344 transitions, 5049 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 03:26:56,159 INFO L231 Difference]: Finished difference. Result has 206 places, 315 transitions, 4487 flow [2024-06-28 03:26:56,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4487, PETRI_PLACES=206, PETRI_TRANSITIONS=315} [2024-06-28 03:26:56,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-28 03:26:56,159 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 315 transitions, 4487 flow [2024-06-28 03:26:56,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:56,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:56,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:56,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:26:56,160 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:56,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:56,160 INFO L85 PathProgramCache]: Analyzing trace with hash 353701610, now seen corresponding path program 1 times [2024-06-28 03:26:56,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:56,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580585698] [2024-06-28 03:26:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:56,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:56,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580585698] [2024-06-28 03:26:56,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580585698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:56,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:56,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:26:56,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594919961] [2024-06-28 03:26:56,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:56,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:26:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:26:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:26:56,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:56,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 315 transitions, 4487 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-28 03:26:56,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:56,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:56,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:58,268 INFO L124 PetriNetUnfolderBase]: 3209/4888 cut-off events. [2024-06-28 03:26:58,268 INFO L125 PetriNetUnfolderBase]: For 385551/385564 co-relation queries the response was YES. [2024-06-28 03:26:58,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42087 conditions, 4888 events. 3209/4888 cut-off events. For 385551/385564 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25412 event pairs, 1074 based on Foata normal form. 14/4901 useless extension candidates. Maximal degree in co-relation 41989. Up to 4377 conditions per place. [2024-06-28 03:26:58,311 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 115 changer transitions 0/362 dead transitions. [2024-06-28 03:26:58,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 362 transitions, 5967 flow [2024-06-28 03:26:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:26:58,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:26:58,312 INFO L175 Difference]: Start difference. First operand has 206 places, 315 transitions, 4487 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:26:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 362 transitions, 5967 flow [2024-06-28 03:26:59,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 362 transitions, 5806 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:26:59,254 INFO L231 Difference]: Finished difference. Result has 214 places, 333 transitions, 5023 flow [2024-06-28 03:26:59,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4336, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5023, PETRI_PLACES=214, PETRI_TRANSITIONS=333} [2024-06-28 03:26:59,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-28 03:26:59,255 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 333 transitions, 5023 flow [2024-06-28 03:26:59,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-28 03:26:59,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:59,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:59,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:26:59,256 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:59,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 907639688, now seen corresponding path program 2 times [2024-06-28 03:26:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:59,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946939960] [2024-06-28 03:26:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:59,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:59,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:59,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946939960] [2024-06-28 03:26:59,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946939960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:59,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:59,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:26:59,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151538858] [2024-06-28 03:26:59,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:59,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:26:59,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:26:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:26:59,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:26:59,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 333 transitions, 5023 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:26:59,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:59,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:26:59,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:01,081 INFO L124 PetriNetUnfolderBase]: 3229/4916 cut-off events. [2024-06-28 03:27:01,082 INFO L125 PetriNetUnfolderBase]: For 404886/404899 co-relation queries the response was YES. [2024-06-28 03:27:01,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43140 conditions, 4916 events. 3229/4916 cut-off events. For 404886/404899 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25575 event pairs, 1084 based on Foata normal form. 16/4931 useless extension candidates. Maximal degree in co-relation 43038. Up to 4397 conditions per place. [2024-06-28 03:27:01,131 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 231 selfloop transitions, 123 changer transitions 0/368 dead transitions. [2024-06-28 03:27:01,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 368 transitions, 6368 flow [2024-06-28 03:27:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:27:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:27:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:27:01,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:27:01,132 INFO L175 Difference]: Start difference. First operand has 214 places, 333 transitions, 5023 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:27:01,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 368 transitions, 6368 flow [2024-06-28 03:27:02,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 368 transitions, 6039 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:02,031 INFO L231 Difference]: Finished difference. Result has 218 places, 342 transitions, 5204 flow [2024-06-28 03:27:02,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4724, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5204, PETRI_PLACES=218, PETRI_TRANSITIONS=342} [2024-06-28 03:27:02,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-28 03:27:02,032 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 342 transitions, 5204 flow [2024-06-28 03:27:02,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:02,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:02,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:02,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:27:02,033 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)] === [2024-06-28 03:27:02,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash 740843292, now seen corresponding path program 2 times [2024-06-28 03:27:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:02,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134567667] [2024-06-28 03:27:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:02,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134567667] [2024-06-28 03:27:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134567667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:03,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:03,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:27:03,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929484189] [2024-06-28 03:27:03,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:03,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:27:03,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:27:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:27:03,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:03,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 342 transitions, 5204 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:03,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:03,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:03,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:04,544 INFO L124 PetriNetUnfolderBase]: 3527/5392 cut-off events. [2024-06-28 03:27:04,544 INFO L125 PetriNetUnfolderBase]: For 425815/425828 co-relation queries the response was YES. [2024-06-28 03:27:04,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46140 conditions, 5392 events. 3527/5392 cut-off events. For 425815/425828 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28827 event pairs, 1025 based on Foata normal form. 22/5413 useless extension candidates. Maximal degree in co-relation 46036. Up to 4517 conditions per place. [2024-06-28 03:27:04,605 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 308 selfloop transitions, 106 changer transitions 0/428 dead transitions. [2024-06-28 03:27:04,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 428 transitions, 6755 flow [2024-06-28 03:27:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:27:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:27:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 03:27:04,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-28 03:27:04,606 INFO L175 Difference]: Start difference. First operand has 218 places, 342 transitions, 5204 flow. Second operand 10 states and 191 transitions. [2024-06-28 03:27:04,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 428 transitions, 6755 flow [2024-06-28 03:27:05,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 428 transitions, 6509 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 03:27:05,503 INFO L231 Difference]: Finished difference. Result has 225 places, 382 transitions, 5765 flow [2024-06-28 03:27:05,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5765, PETRI_PLACES=225, PETRI_TRANSITIONS=382} [2024-06-28 03:27:05,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-28 03:27:05,504 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 382 transitions, 5765 flow [2024-06-28 03:27:05,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:05,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:05,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:05,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:27:05,505 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:05,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash 913353608, now seen corresponding path program 3 times [2024-06-28 03:27:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:05,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707980730] [2024-06-28 03:27:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:06,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707980730] [2024-06-28 03:27:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707980730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:06,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:06,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:27:06,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092999089] [2024-06-28 03:27:06,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:27:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:27:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:27:06,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:06,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 382 transitions, 5765 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:06,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:06,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:06,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:07,369 INFO L124 PetriNetUnfolderBase]: 3513/5365 cut-off events. [2024-06-28 03:27:07,370 INFO L125 PetriNetUnfolderBase]: For 416911/416924 co-relation queries the response was YES. [2024-06-28 03:27:07,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46258 conditions, 5365 events. 3513/5365 cut-off events. For 416911/416924 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28555 event pairs, 1129 based on Foata normal form. 16/5380 useless extension candidates. Maximal degree in co-relation 46151. Up to 4836 conditions per place. [2024-06-28 03:27:07,429 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 119 changer transitions 0/402 dead transitions. [2024-06-28 03:27:07,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 402 transitions, 6817 flow [2024-06-28 03:27:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:27:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:27:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:27:07,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:27:07,430 INFO L175 Difference]: Start difference. First operand has 225 places, 382 transitions, 5765 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:27:07,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 402 transitions, 6817 flow [2024-06-28 03:27:08,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 402 transitions, 6656 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 03:27:08,467 INFO L231 Difference]: Finished difference. Result has 230 places, 382 transitions, 5860 flow [2024-06-28 03:27:08,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5604, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5860, PETRI_PLACES=230, PETRI_TRANSITIONS=382} [2024-06-28 03:27:08,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-28 03:27:08,468 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 382 transitions, 5860 flow [2024-06-28 03:27:08,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:08,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:08,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:08,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:27:08,468 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:08,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 913349640, now seen corresponding path program 5 times [2024-06-28 03:27:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:08,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430563429] [2024-06-28 03:27:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:09,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430563429] [2024-06-28 03:27:09,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430563429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:09,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:09,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:09,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940442520] [2024-06-28 03:27:09,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:09,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:09,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:09,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:09,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 382 transitions, 5860 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:09,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:09,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:09,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:10,980 INFO L124 PetriNetUnfolderBase]: 3525/5382 cut-off events. [2024-06-28 03:27:10,981 INFO L125 PetriNetUnfolderBase]: For 428250/428263 co-relation queries the response was YES. [2024-06-28 03:27:11,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46516 conditions, 5382 events. 3525/5382 cut-off events. For 428250/428263 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28644 event pairs, 1129 based on Foata normal form. 14/5395 useless extension candidates. Maximal degree in co-relation 46408. Up to 4842 conditions per place. [2024-06-28 03:27:11,032 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 270 selfloop transitions, 123 changer transitions 0/407 dead transitions. [2024-06-28 03:27:11,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 407 transitions, 6996 flow [2024-06-28 03:27:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:27:11,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:27:11,034 INFO L175 Difference]: Start difference. First operand has 230 places, 382 transitions, 5860 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:27:11,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 407 transitions, 6996 flow [2024-06-28 03:27:11,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 407 transitions, 6860 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 03:27:11,916 INFO L231 Difference]: Finished difference. Result has 235 places, 386 transitions, 6054 flow [2024-06-28 03:27:11,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6054, PETRI_PLACES=235, PETRI_TRANSITIONS=386} [2024-06-28 03:27:11,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 03:27:11,917 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 386 transitions, 6054 flow [2024-06-28 03:27:11,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:11,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:11,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:11,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:27:11,918 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:11,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1412051321, now seen corresponding path program 2 times [2024-06-28 03:27:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:11,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728413751] [2024-06-28 03:27:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:11,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:12,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:12,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728413751] [2024-06-28 03:27:12,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728413751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:12,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:12,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:12,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8431042] [2024-06-28 03:27:12,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:12,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:12,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:12,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:12,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:12,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:12,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 386 transitions, 6054 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) [2024-06-28 03:27:12,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:12,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:12,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:14,052 INFO L124 PetriNetUnfolderBase]: 3680/5560 cut-off events. [2024-06-28 03:27:14,053 INFO L125 PetriNetUnfolderBase]: For 447659/447672 co-relation queries the response was YES. [2024-06-28 03:27:14,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48030 conditions, 5560 events. 3680/5560 cut-off events. For 447659/447672 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29204 event pairs, 1201 based on Foata normal form. 14/5573 useless extension candidates. Maximal degree in co-relation 47921. Up to 4984 conditions per place. [2024-06-28 03:27:14,119 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 288 selfloop transitions, 136 changer transitions 0/427 dead transitions. [2024-06-28 03:27:14,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 427 transitions, 7508 flow [2024-06-28 03:27:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:27:14,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 03:27:14,121 INFO L175 Difference]: Start difference. First operand has 235 places, 386 transitions, 6054 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:27:14,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 427 transitions, 7508 flow [2024-06-28 03:27:14,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 427 transitions, 7322 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 03:27:15,003 INFO L231 Difference]: Finished difference. Result has 241 places, 403 transitions, 6405 flow [2024-06-28 03:27:15,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6405, PETRI_PLACES=241, PETRI_TRANSITIONS=403} [2024-06-28 03:27:15,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-28 03:27:15,004 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 403 transitions, 6405 flow [2024-06-28 03:27:15,004 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) [2024-06-28 03:27:15,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:15,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:15,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:27:15,005 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:15,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:15,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1412062481, now seen corresponding path program 3 times [2024-06-28 03:27:15,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:15,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030779688] [2024-06-28 03:27:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:15,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:15,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:15,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030779688] [2024-06-28 03:27:15,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030779688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:15,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:15,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:15,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008948242] [2024-06-28 03:27:15,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:15,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:15,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:15,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:15,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:15,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 403 transitions, 6405 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) [2024-06-28 03:27:15,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:15,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:15,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:17,102 INFO L124 PetriNetUnfolderBase]: 3676/5555 cut-off events. [2024-06-28 03:27:17,103 INFO L125 PetriNetUnfolderBase]: For 461106/461119 co-relation queries the response was YES. [2024-06-28 03:27:17,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48322 conditions, 5555 events. 3676/5555 cut-off events. For 461106/461119 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29209 event pairs, 1201 based on Foata normal form. 14/5568 useless extension candidates. Maximal degree in co-relation 48211. Up to 4982 conditions per place. [2024-06-28 03:27:17,160 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 286 selfloop transitions, 138 changer transitions 0/427 dead transitions. [2024-06-28 03:27:17,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 427 transitions, 7666 flow [2024-06-28 03:27:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:27:17,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:27:17,161 INFO L175 Difference]: Start difference. First operand has 241 places, 403 transitions, 6405 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:27:17,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 427 transitions, 7666 flow [2024-06-28 03:27:18,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 427 transitions, 7414 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:18,224 INFO L231 Difference]: Finished difference. Result has 245 places, 403 transitions, 6437 flow [2024-06-28 03:27:18,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6437, PETRI_PLACES=245, PETRI_TRANSITIONS=403} [2024-06-28 03:27:18,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-28 03:27:18,225 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 403 transitions, 6437 flow [2024-06-28 03:27:18,225 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) [2024-06-28 03:27:18,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:18,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:18,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:27:18,225 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:18,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2048529738, now seen corresponding path program 1 times [2024-06-28 03:27:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:18,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826801614] [2024-06-28 03:27:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:18,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:18,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826801614] [2024-06-28 03:27:18,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826801614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:18,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:18,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857753545] [2024-06-28 03:27:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:18,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:18,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:18,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 403 transitions, 6437 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) [2024-06-28 03:27:18,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:18,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:18,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:20,317 INFO L124 PetriNetUnfolderBase]: 3691/5572 cut-off events. [2024-06-28 03:27:20,317 INFO L125 PetriNetUnfolderBase]: For 477422/477426 co-relation queries the response was YES. [2024-06-28 03:27:20,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48795 conditions, 5572 events. 3691/5572 cut-off events. For 477422/477426 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29324 event pairs, 1338 based on Foata normal form. 7/5578 useless extension candidates. Maximal degree in co-relation 48683. Up to 5446 conditions per place. [2024-06-28 03:27:20,372 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 388 selfloop transitions, 45 changer transitions 0/436 dead transitions. [2024-06-28 03:27:20,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 436 transitions, 7630 flow [2024-06-28 03:27:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 03:27:20,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 03:27:20,374 INFO L175 Difference]: Start difference. First operand has 245 places, 403 transitions, 6437 flow. Second operand 9 states and 151 transitions. [2024-06-28 03:27:20,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 436 transitions, 7630 flow [2024-06-28 03:27:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 436 transitions, 7344 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:27:21,497 INFO L231 Difference]: Finished difference. Result has 249 places, 414 transitions, 6440 flow [2024-06-28 03:27:21,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6440, PETRI_PLACES=249, PETRI_TRANSITIONS=414} [2024-06-28 03:27:21,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 03:27:21,498 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 414 transitions, 6440 flow [2024-06-28 03:27:21,498 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) [2024-06-28 03:27:21,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:21,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:21,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:27:21,499 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:21,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:21,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1816942354, now seen corresponding path program 4 times [2024-06-28 03:27:21,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:21,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105738874] [2024-06-28 03:27:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:22,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105738874] [2024-06-28 03:27:22,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105738874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:22,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:22,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:27:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532758824] [2024-06-28 03:27:22,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:22,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:27:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:27:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:27:22,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:22,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 414 transitions, 6440 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:22,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:22,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:22,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:23,440 INFO L124 PetriNetUnfolderBase]: 3622/5516 cut-off events. [2024-06-28 03:27:23,440 INFO L125 PetriNetUnfolderBase]: For 498757/498770 co-relation queries the response was YES. [2024-06-28 03:27:23,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49311 conditions, 5516 events. 3622/5516 cut-off events. For 498757/498770 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29435 event pairs, 1142 based on Foata normal form. 16/5531 useless extension candidates. Maximal degree in co-relation 49196. Up to 4951 conditions per place. [2024-06-28 03:27:23,500 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 143 changer transitions 0/446 dead transitions. [2024-06-28 03:27:23,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 446 transitions, 7895 flow [2024-06-28 03:27:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:27:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:27:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:27:23,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:27:23,501 INFO L175 Difference]: Start difference. First operand has 249 places, 414 transitions, 6440 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:27:23,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 446 transitions, 7895 flow [2024-06-28 03:27:24,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 446 transitions, 7827 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-28 03:27:24,650 INFO L231 Difference]: Finished difference. Result has 256 places, 427 transitions, 7039 flow [2024-06-28 03:27:24,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6372, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7039, PETRI_PLACES=256, PETRI_TRANSITIONS=427} [2024-06-28 03:27:24,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-28 03:27:24,651 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 427 transitions, 7039 flow [2024-06-28 03:27:24,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:24,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:24,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:27:24,651 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:24,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1811228434, now seen corresponding path program 5 times [2024-06-28 03:27:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256849664] [2024-06-28 03:27:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:25,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:25,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256849664] [2024-06-28 03:27:25,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256849664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:25,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:25,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:27:25,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575267628] [2024-06-28 03:27:25,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:25,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:27:25,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:27:25,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:27:25,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:25,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 427 transitions, 7039 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:25,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:25,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:25,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:26,662 INFO L124 PetriNetUnfolderBase]: 3616/5510 cut-off events. [2024-06-28 03:27:26,662 INFO L125 PetriNetUnfolderBase]: For 508133/508146 co-relation queries the response was YES. [2024-06-28 03:27:26,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49960 conditions, 5510 events. 3616/5510 cut-off events. For 508133/508146 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29396 event pairs, 1134 based on Foata normal form. 14/5523 useless extension candidates. Maximal degree in co-relation 49841. Up to 4946 conditions per place. [2024-06-28 03:27:26,729 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 132 changer transitions 0/443 dead transitions. [2024-06-28 03:27:26,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 443 transitions, 8175 flow [2024-06-28 03:27:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:27:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:27:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 03:27:26,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 03:27:26,731 INFO L175 Difference]: Start difference. First operand has 256 places, 427 transitions, 7039 flow. Second operand 7 states and 130 transitions. [2024-06-28 03:27:26,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 443 transitions, 8175 flow [2024-06-28 03:27:28,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 443 transitions, 7925 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:28,087 INFO L231 Difference]: Finished difference. Result has 258 places, 427 transitions, 7082 flow [2024-06-28 03:27:28,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7082, PETRI_PLACES=258, PETRI_TRANSITIONS=427} [2024-06-28 03:27:28,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-28 03:27:28,088 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 427 transitions, 7082 flow [2024-06-28 03:27:28,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:28,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:28,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:28,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:27:28,089 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)] === [2024-06-28 03:27:28,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash 430693412, now seen corresponding path program 3 times [2024-06-28 03:27:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:28,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760307308] [2024-06-28 03:27:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:28,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:29,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:29,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760307308] [2024-06-28 03:27:29,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760307308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:29,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:29,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710972596] [2024-06-28 03:27:29,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:29,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:29,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:29,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 427 transitions, 7082 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:29,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:29,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:29,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:31,045 INFO L124 PetriNetUnfolderBase]: 3657/5589 cut-off events. [2024-06-28 03:27:31,045 INFO L125 PetriNetUnfolderBase]: For 521314/521327 co-relation queries the response was YES. [2024-06-28 03:27:31,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50220 conditions, 5589 events. 3657/5589 cut-off events. For 521314/521327 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 30000 event pairs, 1037 based on Foata normal form. 22/5610 useless extension candidates. Maximal degree in co-relation 50102. Up to 4540 conditions per place. [2024-06-28 03:27:31,107 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 102 changer transitions 0/465 dead transitions. [2024-06-28 03:27:31,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 465 transitions, 8172 flow [2024-06-28 03:27:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:27:31,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:27:31,108 INFO L175 Difference]: Start difference. First operand has 258 places, 427 transitions, 7082 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:27:31,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 465 transitions, 8172 flow [2024-06-28 03:27:32,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 465 transitions, 7971 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:32,416 INFO L231 Difference]: Finished difference. Result has 262 places, 428 transitions, 7131 flow [2024-06-28 03:27:32,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6881, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7131, PETRI_PLACES=262, PETRI_TRANSITIONS=428} [2024-06-28 03:27:32,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-28 03:27:32,417 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 428 transitions, 7131 flow [2024-06-28 03:27:32,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:32,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:32,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:32,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:27:32,417 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:32,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:32,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1811232061, now seen corresponding path program 4 times [2024-06-28 03:27:32,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:32,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746685287] [2024-06-28 03:27:32,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:32,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:33,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:33,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746685287] [2024-06-28 03:27:33,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746685287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:33,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:33,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:33,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221972272] [2024-06-28 03:27:33,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:33,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:33,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:33,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:33,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 428 transitions, 7131 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) [2024-06-28 03:27:33,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:33,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:33,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:34,614 INFO L124 PetriNetUnfolderBase]: 3798/5739 cut-off events. [2024-06-28 03:27:34,614 INFO L125 PetriNetUnfolderBase]: For 517296/517309 co-relation queries the response was YES. [2024-06-28 03:27:34,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51498 conditions, 5739 events. 3798/5739 cut-off events. For 517296/517309 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30369 event pairs, 1198 based on Foata normal form. 14/5752 useless extension candidates. Maximal degree in co-relation 51380. Up to 5126 conditions per place. [2024-06-28 03:27:34,684 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 161 changer transitions 0/458 dead transitions. [2024-06-28 03:27:34,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 458 transitions, 8632 flow [2024-06-28 03:27:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:27:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:27:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:27:34,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:27:34,685 INFO L175 Difference]: Start difference. First operand has 262 places, 428 transitions, 7131 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:27:34,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 458 transitions, 8632 flow [2024-06-28 03:27:36,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 458 transitions, 8394 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 03:27:36,104 INFO L231 Difference]: Finished difference. Result has 264 places, 440 transitions, 7502 flow [2024-06-28 03:27:36,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6899, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7502, PETRI_PLACES=264, PETRI_TRANSITIONS=440} [2024-06-28 03:27:36,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-28 03:27:36,105 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 440 transitions, 7502 flow [2024-06-28 03:27:36,105 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) [2024-06-28 03:27:36,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:36,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:36,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:27:36,106 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:36,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1811232402, now seen corresponding path program 6 times [2024-06-28 03:27:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:36,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324298022] [2024-06-28 03:27:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:37,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:37,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324298022] [2024-06-28 03:27:37,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324298022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:37,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:37,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131586820] [2024-06-28 03:27:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:37,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:37,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:37,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:37,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 440 transitions, 7502 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:37,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:37,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:37,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:38,302 INFO L124 PetriNetUnfolderBase]: 3713/5659 cut-off events. [2024-06-28 03:27:38,303 INFO L125 PetriNetUnfolderBase]: For 518013/518026 co-relation queries the response was YES. [2024-06-28 03:27:38,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51233 conditions, 5659 events. 3713/5659 cut-off events. For 518013/518026 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30363 event pairs, 1141 based on Foata normal form. 14/5672 useless extension candidates. Maximal degree in co-relation 51113. Up to 5060 conditions per place. [2024-06-28 03:27:38,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 297 selfloop transitions, 142 changer transitions 0/461 dead transitions. [2024-06-28 03:27:38,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 461 transitions, 8746 flow [2024-06-28 03:27:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:27:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:27:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:27:38,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:27:38,374 INFO L175 Difference]: Start difference. First operand has 264 places, 440 transitions, 7502 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:27:38,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 461 transitions, 8746 flow [2024-06-28 03:27:39,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 461 transitions, 8552 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 03:27:39,921 INFO L231 Difference]: Finished difference. Result has 268 places, 444 transitions, 7693 flow [2024-06-28 03:27:39,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7693, PETRI_PLACES=268, PETRI_TRANSITIONS=444} [2024-06-28 03:27:39,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-28 03:27:39,922 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 444 transitions, 7693 flow [2024-06-28 03:27:39,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:39,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:39,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:39,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:27:39,923 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:39,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:39,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1811220901, now seen corresponding path program 5 times [2024-06-28 03:27:39,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:39,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396438379] [2024-06-28 03:27:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:39,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:40,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:40,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396438379] [2024-06-28 03:27:40,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396438379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:40,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:40,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:40,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264407715] [2024-06-28 03:27:40,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:40,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:40,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:40,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:40,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 444 transitions, 7693 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) [2024-06-28 03:27:40,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:40,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:40,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:41,992 INFO L124 PetriNetUnfolderBase]: 3806/5751 cut-off events. [2024-06-28 03:27:41,992 INFO L125 PetriNetUnfolderBase]: For 514414/514427 co-relation queries the response was YES. [2024-06-28 03:27:42,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51594 conditions, 5751 events. 3806/5751 cut-off events. For 514414/514427 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30437 event pairs, 1203 based on Foata normal form. 14/5764 useless extension candidates. Maximal degree in co-relation 51474. Up to 5141 conditions per place. [2024-06-28 03:27:42,066 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 297 selfloop transitions, 162 changer transitions 0/462 dead transitions. [2024-06-28 03:27:42,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 462 transitions, 9019 flow [2024-06-28 03:27:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:27:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:27:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:27:42,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:27:42,068 INFO L175 Difference]: Start difference. First operand has 268 places, 444 transitions, 7693 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:27:42,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 462 transitions, 9019 flow [2024-06-28 03:27:43,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 462 transitions, 8713 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:43,432 INFO L231 Difference]: Finished difference. Result has 271 places, 444 transitions, 7731 flow [2024-06-28 03:27:43,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7393, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7731, PETRI_PLACES=271, PETRI_TRANSITIONS=444} [2024-06-28 03:27:43,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-28 03:27:43,433 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 444 transitions, 7731 flow [2024-06-28 03:27:43,433 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) [2024-06-28 03:27:43,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:43,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:43,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:27:43,433 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:43,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1811220498, now seen corresponding path program 2 times [2024-06-28 03:27:43,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:43,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207340218] [2024-06-28 03:27:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:43,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:44,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207340218] [2024-06-28 03:27:44,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207340218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:44,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:44,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:27:44,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334103458] [2024-06-28 03:27:44,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:44,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:27:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:27:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:27:44,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:27:44,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 444 transitions, 7731 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) [2024-06-28 03:27:44,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:44,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:27:44,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:45,790 INFO L124 PetriNetUnfolderBase]: 3837/5790 cut-off events. [2024-06-28 03:27:45,790 INFO L125 PetriNetUnfolderBase]: For 524268/524272 co-relation queries the response was YES. [2024-06-28 03:27:45,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52141 conditions, 5790 events. 3837/5790 cut-off events. For 524268/524272 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30720 event pairs, 1357 based on Foata normal form. 7/5796 useless extension candidates. Maximal degree in co-relation 52020. Up to 5647 conditions per place. [2024-06-28 03:27:45,867 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 416 selfloop transitions, 53 changer transitions 0/472 dead transitions. [2024-06-28 03:27:45,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 472 transitions, 9038 flow [2024-06-28 03:27:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:27:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:27:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:27:45,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:27:45,868 INFO L175 Difference]: Start difference. First operand has 271 places, 444 transitions, 7731 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:27:45,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 472 transitions, 9038 flow [2024-06-28 03:27:47,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 472 transitions, 8707 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 03:27:47,125 INFO L231 Difference]: Finished difference. Result has 272 places, 452 transitions, 7708 flow [2024-06-28 03:27:47,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7402, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7708, PETRI_PLACES=272, PETRI_TRANSITIONS=452} [2024-06-28 03:27:47,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-28 03:27:47,126 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 452 transitions, 7708 flow [2024-06-28 03:27:47,126 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) [2024-06-28 03:27:47,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:47,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:47,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:27:47,126 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:47,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:47,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1607910440, now seen corresponding path program 6 times [2024-06-28 03:27:47,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:47,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308872793] [2024-06-28 03:27:47,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:47,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:47,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:47,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308872793] [2024-06-28 03:27:47,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308872793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:47,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:47,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:27:47,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762951163] [2024-06-28 03:27:47,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:47,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:27:47,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:27:47,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:27:47,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:47,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 452 transitions, 7708 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:47,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:47,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:47,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:49,091 INFO L124 PetriNetUnfolderBase]: 3722/5676 cut-off events. [2024-06-28 03:27:49,092 INFO L125 PetriNetUnfolderBase]: For 523500/523500 co-relation queries the response was YES. [2024-06-28 03:27:49,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51245 conditions, 5676 events. 3722/5676 cut-off events. For 523500/523500 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30559 event pairs, 1484 based on Foata normal form. 2/5677 useless extension candidates. Maximal degree in co-relation 51124. Up to 5420 conditions per place. [2024-06-28 03:27:49,159 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 415 selfloop transitions, 31 changer transitions 0/468 dead transitions. [2024-06-28 03:27:49,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 468 transitions, 8787 flow [2024-06-28 03:27:49,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:27:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:27:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 03:27:49,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 03:27:49,160 INFO L175 Difference]: Start difference. First operand has 272 places, 452 transitions, 7708 flow. Second operand 7 states and 124 transitions. [2024-06-28 03:27:49,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 468 transitions, 8787 flow [2024-06-28 03:27:50,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 468 transitions, 8621 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-28 03:27:50,545 INFO L231 Difference]: Finished difference. Result has 275 places, 452 transitions, 7614 flow [2024-06-28 03:27:50,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7542, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7614, PETRI_PLACES=275, PETRI_TRANSITIONS=452} [2024-06-28 03:27:50,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-28 03:27:50,546 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 452 transitions, 7614 flow [2024-06-28 03:27:50,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:50,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:50,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:50,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:27:50,546 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:50,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:50,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1596482600, now seen corresponding path program 7 times [2024-06-28 03:27:50,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:50,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562664228] [2024-06-28 03:27:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:50,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:51,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562664228] [2024-06-28 03:27:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562664228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:51,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:51,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:27:51,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183852480] [2024-06-28 03:27:51,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:51,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:27:51,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:27:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:27:51,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:51,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 452 transitions, 7614 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:51,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:51,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:51,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:52,495 INFO L124 PetriNetUnfolderBase]: 3726/5681 cut-off events. [2024-06-28 03:27:52,495 INFO L125 PetriNetUnfolderBase]: For 534453/534453 co-relation queries the response was YES. [2024-06-28 03:27:52,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51289 conditions, 5681 events. 3726/5681 cut-off events. For 534453/534453 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30573 event pairs, 1486 based on Foata normal form. 1/5681 useless extension candidates. Maximal degree in co-relation 51166. Up to 5446 conditions per place. [2024-06-28 03:27:52,569 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 425 selfloop transitions, 20 changer transitions 0/467 dead transitions. [2024-06-28 03:27:52,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 467 transitions, 8628 flow [2024-06-28 03:27:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:27:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:27:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:27:52,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:27:52,570 INFO L175 Difference]: Start difference. First operand has 275 places, 452 transitions, 7614 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:27:52,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 467 transitions, 8628 flow [2024-06-28 03:27:53,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 467 transitions, 8196 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-28 03:27:53,671 INFO L231 Difference]: Finished difference. Result has 273 places, 455 transitions, 7312 flow [2024-06-28 03:27:53,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7195, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7312, PETRI_PLACES=273, PETRI_TRANSITIONS=455} [2024-06-28 03:27:53,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 03:27:53,672 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 455 transitions, 7312 flow [2024-06-28 03:27:53,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:53,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:53,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:53,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:27:53,672 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:53,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2064611312, now seen corresponding path program 8 times [2024-06-28 03:27:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992242675] [2024-06-28 03:27:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:53,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992242675] [2024-06-28 03:27:54,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992242675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:54,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:54,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:27:54,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444640470] [2024-06-28 03:27:54,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:54,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:27:54,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:54,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:27:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:27:54,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:54,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 455 transitions, 7312 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:54,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:54,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:54,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:55,629 INFO L124 PetriNetUnfolderBase]: 3720/5675 cut-off events. [2024-06-28 03:27:55,629 INFO L125 PetriNetUnfolderBase]: For 542187/542189 co-relation queries the response was YES. [2024-06-28 03:27:55,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50987 conditions, 5675 events. 3720/5675 cut-off events. For 542187/542189 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30608 event pairs, 1484 based on Foata normal form. 4/5678 useless extension candidates. Maximal degree in co-relation 50864. Up to 5414 conditions per place. [2024-06-28 03:27:55,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 30 changer transitions 0/465 dead transitions. [2024-06-28 03:27:55,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 465 transitions, 8350 flow [2024-06-28 03:27:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:27:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:27:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:27:55,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-28 03:27:55,703 INFO L175 Difference]: Start difference. First operand has 273 places, 455 transitions, 7312 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:27:55,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 465 transitions, 8350 flow [2024-06-28 03:27:57,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 465 transitions, 8280 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:57,022 INFO L231 Difference]: Finished difference. Result has 275 places, 455 transitions, 7310 flow [2024-06-28 03:27:57,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7242, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7310, PETRI_PLACES=275, PETRI_TRANSITIONS=455} [2024-06-28 03:27:57,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-28 03:27:57,023 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 455 transitions, 7310 flow [2024-06-28 03:27:57,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:57,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:57,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:57,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:27:57,023 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:57,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash 586705134, now seen corresponding path program 9 times [2024-06-28 03:27:57,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:57,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285375301] [2024-06-28 03:27:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:57,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:57,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:57,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285375301] [2024-06-28 03:27:57,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285375301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:57,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:57,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:27:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368900684] [2024-06-28 03:27:57,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:27:57,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:27:57,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:27:57,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:27:57,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 455 transitions, 7310 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:27:57,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:57,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:27:57,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:59,010 INFO L124 PetriNetUnfolderBase]: 3716/5669 cut-off events. [2024-06-28 03:27:59,010 INFO L125 PetriNetUnfolderBase]: For 553901/553903 co-relation queries the response was YES. [2024-06-28 03:27:59,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51125 conditions, 5669 events. 3716/5669 cut-off events. For 553901/553903 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30518 event pairs, 1484 based on Foata normal form. 3/5671 useless extension candidates. Maximal degree in co-relation 51001. Up to 5432 conditions per place. [2024-06-28 03:27:59,070 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 20 changer transitions 0/464 dead transitions. [2024-06-28 03:27:59,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 464 transitions, 8224 flow [2024-06-28 03:27:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:27:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:27:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:27:59,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:27:59,071 INFO L175 Difference]: Start difference. First operand has 275 places, 455 transitions, 7310 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:27:59,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 464 transitions, 8224 flow [2024-06-28 03:28:00,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 464 transitions, 8104 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:28:00,327 INFO L231 Difference]: Finished difference. Result has 277 places, 455 transitions, 7236 flow [2024-06-28 03:28:00,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7190, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7236, PETRI_PLACES=277, PETRI_TRANSITIONS=455} [2024-06-28 03:28:00,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-28 03:28:00,328 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 455 transitions, 7236 flow [2024-06-28 03:28:00,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-28 03:28:00,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:00,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:00,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:28:00,329 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)] === [2024-06-28 03:28:00,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -41800288, now seen corresponding path program 4 times [2024-06-28 03:28:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248850712] [2024-06-28 03:28:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:01,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:01,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248850712] [2024-06-28 03:28:01,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248850712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:01,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:01,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056445791] [2024-06-28 03:28:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:01,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:01,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:01,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:01,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 455 transitions, 7236 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:01,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:01,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:01,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:02,687 INFO L124 PetriNetUnfolderBase]: 3757/5739 cut-off events. [2024-06-28 03:28:02,687 INFO L125 PetriNetUnfolderBase]: For 581272/581274 co-relation queries the response was YES. [2024-06-28 03:28:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51646 conditions, 5739 events. 3757/5739 cut-off events. For 581272/581274 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 31042 event pairs, 1469 based on Foata normal form. 12/5750 useless extension candidates. Maximal degree in co-relation 51521. Up to 5364 conditions per place. [2024-06-28 03:28:02,765 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 443 selfloop transitions, 19 changer transitions 0/484 dead transitions. [2024-06-28 03:28:02,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 484 transitions, 8302 flow [2024-06-28 03:28:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:28:02,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:28:02,767 INFO L175 Difference]: Start difference. First operand has 277 places, 455 transitions, 7236 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:28:02,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 484 transitions, 8302 flow [2024-06-28 03:28:04,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 484 transitions, 8230 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 03:28:04,259 INFO L231 Difference]: Finished difference. Result has 278 places, 456 transitions, 7238 flow [2024-06-28 03:28:04,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7164, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7238, PETRI_PLACES=278, PETRI_TRANSITIONS=456} [2024-06-28 03:28:04,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-28 03:28:04,260 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 456 transitions, 7238 flow [2024-06-28 03:28:04,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:04,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:04,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:28:04,261 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:04,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:04,261 INFO L85 PathProgramCache]: Analyzing trace with hash 168073492, now seen corresponding path program 5 times [2024-06-28 03:28:04,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:04,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271529482] [2024-06-28 03:28:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:04,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:05,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271529482] [2024-06-28 03:28:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271529482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:05,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:05,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:28:05,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727963987] [2024-06-28 03:28:05,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:05,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:28:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:28:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:28:05,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:05,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 456 transitions, 7238 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:05,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:05,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:05,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:06,905 INFO L124 PetriNetUnfolderBase]: 3778/5782 cut-off events. [2024-06-28 03:28:06,905 INFO L125 PetriNetUnfolderBase]: For 597523/597536 co-relation queries the response was YES. [2024-06-28 03:28:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51637 conditions, 5782 events. 3778/5782 cut-off events. For 597523/597536 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31334 event pairs, 1050 based on Foata normal form. 34/5815 useless extension candidates. Maximal degree in co-relation 51511. Up to 4416 conditions per place. [2024-06-28 03:28:06,981 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 351 selfloop transitions, 114 changer transitions 0/487 dead transitions. [2024-06-28 03:28:06,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 487 transitions, 8320 flow [2024-06-28 03:28:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:28:06,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:28:06,982 INFO L175 Difference]: Start difference. First operand has 278 places, 456 transitions, 7238 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:28:06,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 487 transitions, 8320 flow [2024-06-28 03:28:08,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 487 transitions, 8256 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 03:28:08,334 INFO L231 Difference]: Finished difference. Result has 280 places, 457 transitions, 7445 flow [2024-06-28 03:28:08,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7174, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7445, PETRI_PLACES=280, PETRI_TRANSITIONS=457} [2024-06-28 03:28:08,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 03:28:08,335 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 457 transitions, 7445 flow [2024-06-28 03:28:08,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:08,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:08,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:08,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:28:08,335 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)] === [2024-06-28 03:28:08,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash -327137494, now seen corresponding path program 1 times [2024-06-28 03:28:08,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:08,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049439887] [2024-06-28 03:28:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049439887] [2024-06-28 03:28:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049439887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:09,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:09,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:09,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952232756] [2024-06-28 03:28:09,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:09,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:09,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:09,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:09,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 457 transitions, 7445 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:09,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:09,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:09,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:10,785 INFO L124 PetriNetUnfolderBase]: 3852/5893 cut-off events. [2024-06-28 03:28:10,785 INFO L125 PetriNetUnfolderBase]: For 600808/600820 co-relation queries the response was YES. [2024-06-28 03:28:10,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52750 conditions, 5893 events. 3852/5893 cut-off events. For 600808/600820 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31914 event pairs, 898 based on Foata normal form. 26/5918 useless extension candidates. Maximal degree in co-relation 52623. Up to 4761 conditions per place. [2024-06-28 03:28:10,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 362 selfloop transitions, 115 changer transitions 0/499 dead transitions. [2024-06-28 03:28:10,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 499 transitions, 8643 flow [2024-06-28 03:28:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 03:28:10,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-28 03:28:10,860 INFO L175 Difference]: Start difference. First operand has 280 places, 457 transitions, 7445 flow. Second operand 8 states and 167 transitions. [2024-06-28 03:28:10,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 499 transitions, 8643 flow [2024-06-28 03:28:12,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 499 transitions, 8376 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 03:28:12,045 INFO L231 Difference]: Finished difference. Result has 282 places, 459 transitions, 7468 flow [2024-06-28 03:28:12,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7178, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7468, PETRI_PLACES=282, PETRI_TRANSITIONS=459} [2024-06-28 03:28:12,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 03:28:12,046 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 459 transitions, 7468 flow [2024-06-28 03:28:12,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:12,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:12,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:12,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:28:12,046 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)] === [2024-06-28 03:28:12,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash -327130798, now seen corresponding path program 6 times [2024-06-28 03:28:12,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:12,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086316835] [2024-06-28 03:28:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:13,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:13,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086316835] [2024-06-28 03:28:13,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086316835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:13,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:13,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:13,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360949123] [2024-06-28 03:28:13,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:13,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:13,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:13,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:13,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 459 transitions, 7468 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:13,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:13,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:13,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:14,570 INFO L124 PetriNetUnfolderBase]: 3832/5875 cut-off events. [2024-06-28 03:28:14,570 INFO L125 PetriNetUnfolderBase]: For 581272/581278 co-relation queries the response was YES. [2024-06-28 03:28:14,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51886 conditions, 5875 events. 3832/5875 cut-off events. For 581272/581278 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32132 event pairs, 1086 based on Foata normal form. 16/5890 useless extension candidates. Maximal degree in co-relation 51758. Up to 4891 conditions per place. [2024-06-28 03:28:14,634 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 112 changer transitions 0/491 dead transitions. [2024-06-28 03:28:14,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 491 transitions, 8485 flow [2024-06-28 03:28:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:28:14,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 03:28:14,635 INFO L175 Difference]: Start difference. First operand has 282 places, 459 transitions, 7468 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:28:14,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 491 transitions, 8485 flow [2024-06-28 03:28:15,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 491 transitions, 8229 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 03:28:15,888 INFO L231 Difference]: Finished difference. Result has 283 places, 458 transitions, 7383 flow [2024-06-28 03:28:15,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7152, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7383, PETRI_PLACES=283, PETRI_TRANSITIONS=458} [2024-06-28 03:28:15,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-28 03:28:15,888 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 458 transitions, 7383 flow [2024-06-28 03:28:15,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:15,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:15,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:15,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:28:15,889 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:15,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1190017782, now seen corresponding path program 3 times [2024-06-28 03:28:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:15,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39221398] [2024-06-28 03:28:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:16,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:16,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39221398] [2024-06-28 03:28:16,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39221398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:16,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:16,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:16,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077593155] [2024-06-28 03:28:16,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:16,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:16,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:16,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 458 transitions, 7383 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) [2024-06-28 03:28:16,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:16,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:16,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:17,959 INFO L124 PetriNetUnfolderBase]: 3944/5993 cut-off events. [2024-06-28 03:28:17,959 INFO L125 PetriNetUnfolderBase]: For 572400/572400 co-relation queries the response was YES. [2024-06-28 03:28:18,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52309 conditions, 5993 events. 3944/5993 cut-off events. For 572400/572400 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32423 event pairs, 1614 based on Foata normal form. 3/5995 useless extension candidates. Maximal degree in co-relation 52180. Up to 5917 conditions per place. [2024-06-28 03:28:18,036 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 20 changer transitions 0/475 dead transitions. [2024-06-28 03:28:18,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 475 transitions, 8492 flow [2024-06-28 03:28:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 03:28:18,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-28 03:28:18,037 INFO L175 Difference]: Start difference. First operand has 283 places, 458 transitions, 7383 flow. Second operand 8 states and 121 transitions. [2024-06-28 03:28:18,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 475 transitions, 8492 flow [2024-06-28 03:28:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 475 transitions, 8205 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 03:28:19,556 INFO L231 Difference]: Finished difference. Result has 284 places, 463 transitions, 7280 flow [2024-06-28 03:28:19,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7096, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7280, PETRI_PLACES=284, PETRI_TRANSITIONS=463} [2024-06-28 03:28:19,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 03:28:19,557 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 463 transitions, 7280 flow [2024-06-28 03:28:19,557 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) [2024-06-28 03:28:19,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:19,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:19,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:28:19,558 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:19,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:19,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1190463252, now seen corresponding path program 4 times [2024-06-28 03:28:19,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:19,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377575805] [2024-06-28 03:28:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:19,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:20,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:20,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377575805] [2024-06-28 03:28:20,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377575805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:20,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:20,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:20,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226952731] [2024-06-28 03:28:20,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:20,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:20,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:20,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:20,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 463 transitions, 7280 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) [2024-06-28 03:28:20,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:20,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:20,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:21,661 INFO L124 PetriNetUnfolderBase]: 3959/6014 cut-off events. [2024-06-28 03:28:21,661 INFO L125 PetriNetUnfolderBase]: For 584709/584709 co-relation queries the response was YES. [2024-06-28 03:28:21,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51960 conditions, 6014 events. 3959/6014 cut-off events. For 584709/584709 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 32473 event pairs, 1603 based on Foata normal form. 3/6016 useless extension candidates. Maximal degree in co-relation 51831. Up to 5926 conditions per place. [2024-06-28 03:28:21,736 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 27 changer transitions 0/482 dead transitions. [2024-06-28 03:28:21,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 482 transitions, 8420 flow [2024-06-28 03:28:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:28:21,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-28 03:28:21,737 INFO L175 Difference]: Start difference. First operand has 284 places, 463 transitions, 7280 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:28:21,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 482 transitions, 8420 flow [2024-06-28 03:28:23,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 482 transitions, 8288 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 03:28:23,178 INFO L231 Difference]: Finished difference. Result has 287 places, 468 transitions, 7356 flow [2024-06-28 03:28:23,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7148, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7356, PETRI_PLACES=287, PETRI_TRANSITIONS=468} [2024-06-28 03:28:23,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 03:28:23,179 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 468 transitions, 7356 flow [2024-06-28 03:28:23,179 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) [2024-06-28 03:28:23,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:23,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:28:23,179 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:23,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash 580999150, now seen corresponding path program 5 times [2024-06-28 03:28:23,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:23,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078677095] [2024-06-28 03:28:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:23,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:23,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:23,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078677095] [2024-06-28 03:28:23,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078677095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:23,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:23,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:23,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903332126] [2024-06-28 03:28:23,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:23,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:23,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:23,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:23,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:24,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:24,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 468 transitions, 7356 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) [2024-06-28 03:28:24,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:24,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:24,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:25,361 INFO L124 PetriNetUnfolderBase]: 3950/6002 cut-off events. [2024-06-28 03:28:25,361 INFO L125 PetriNetUnfolderBase]: For 593463/593463 co-relation queries the response was YES. [2024-06-28 03:28:25,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51798 conditions, 6002 events. 3950/6002 cut-off events. For 593463/593463 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 32483 event pairs, 1601 based on Foata normal form. 3/6004 useless extension candidates. Maximal degree in co-relation 51668. Up to 5899 conditions per place. [2024-06-28 03:28:25,430 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 443 selfloop transitions, 36 changer transitions 0/482 dead transitions. [2024-06-28 03:28:25,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 482 transitions, 8360 flow [2024-06-28 03:28:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:28:25,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-28 03:28:25,431 INFO L175 Difference]: Start difference. First operand has 287 places, 468 transitions, 7356 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:28:25,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 482 transitions, 8360 flow [2024-06-28 03:28:26,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 482 transitions, 8154 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-28 03:28:26,929 INFO L231 Difference]: Finished difference. Result has 289 places, 468 transitions, 7230 flow [2024-06-28 03:28:26,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7150, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7230, PETRI_PLACES=289, PETRI_TRANSITIONS=468} [2024-06-28 03:28:26,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 03:28:26,929 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 468 transitions, 7230 flow [2024-06-28 03:28:26,930 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) [2024-06-28 03:28:26,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:26,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:26,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:28:26,930 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:26,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1203350665, now seen corresponding path program 6 times [2024-06-28 03:28:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:26,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989484514] [2024-06-28 03:28:26,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:26,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:27,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989484514] [2024-06-28 03:28:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989484514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:27,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:27,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:27,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026988737] [2024-06-28 03:28:27,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:27,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:27,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:27,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:27,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:27,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:27,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 468 transitions, 7230 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) [2024-06-28 03:28:27,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:27,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:27,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:29,038 INFO L124 PetriNetUnfolderBase]: 3994/6064 cut-off events. [2024-06-28 03:28:29,038 INFO L125 PetriNetUnfolderBase]: For 614478/614480 co-relation queries the response was YES. [2024-06-28 03:28:29,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52524 conditions, 6064 events. 3994/6064 cut-off events. For 614478/614480 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32812 event pairs, 1605 based on Foata normal form. 4/6067 useless extension candidates. Maximal degree in co-relation 52393. Up to 5886 conditions per place. [2024-06-28 03:28:29,117 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 55 changer transitions 0/492 dead transitions. [2024-06-28 03:28:29,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 492 transitions, 8706 flow [2024-06-28 03:28:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:28:29,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:28:29,119 INFO L175 Difference]: Start difference. First operand has 289 places, 468 transitions, 7230 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:28:29,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 492 transitions, 8706 flow [2024-06-28 03:28:30,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 492 transitions, 8542 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 03:28:30,591 INFO L231 Difference]: Finished difference. Result has 291 places, 479 transitions, 7368 flow [2024-06-28 03:28:30,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7066, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7368, PETRI_PLACES=291, PETRI_TRANSITIONS=479} [2024-06-28 03:28:30,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-28 03:28:30,592 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 479 transitions, 7368 flow [2024-06-28 03:28:30,592 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) [2024-06-28 03:28:30,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:30,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:30,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:28:30,592 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:30,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1190463655, now seen corresponding path program 7 times [2024-06-28 03:28:30,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:30,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949495088] [2024-06-28 03:28:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:30,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:31,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:31,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949495088] [2024-06-28 03:28:31,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949495088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:31,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:31,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:31,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192043269] [2024-06-28 03:28:31,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:31,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:31,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:31,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 479 transitions, 7368 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) [2024-06-28 03:28:31,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:31,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:31,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:32,665 INFO L124 PetriNetUnfolderBase]: 3990/6059 cut-off events. [2024-06-28 03:28:32,665 INFO L125 PetriNetUnfolderBase]: For 626981/626983 co-relation queries the response was YES. [2024-06-28 03:28:32,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52639 conditions, 6059 events. 3990/6059 cut-off events. For 626981/626983 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32819 event pairs, 1603 based on Foata normal form. 4/6062 useless extension candidates. Maximal degree in co-relation 52506. Up to 5946 conditions per place. [2024-06-28 03:28:32,746 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 37 changer transitions 0/491 dead transitions. [2024-06-28 03:28:32,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 491 transitions, 8545 flow [2024-06-28 03:28:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:32,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-28 03:28:32,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:28:32,747 INFO L175 Difference]: Start difference. First operand has 291 places, 479 transitions, 7368 flow. Second operand 8 states and 126 transitions. [2024-06-28 03:28:32,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 491 transitions, 8545 flow [2024-06-28 03:28:34,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 491 transitions, 8413 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 03:28:34,244 INFO L231 Difference]: Finished difference. Result has 295 places, 480 transitions, 7351 flow [2024-06-28 03:28:34,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7236, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7351, PETRI_PLACES=295, PETRI_TRANSITIONS=480} [2024-06-28 03:28:34,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 03:28:34,245 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 480 transitions, 7351 flow [2024-06-28 03:28:34,245 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) [2024-06-28 03:28:34,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:34,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:34,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:28:34,245 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)] === [2024-06-28 03:28:34,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash 580987587, now seen corresponding path program 8 times [2024-06-28 03:28:34,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:34,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752294750] [2024-06-28 03:28:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:35,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752294750] [2024-06-28 03:28:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752294750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:35,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:35,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908308358] [2024-06-28 03:28:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:35,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:35,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 480 transitions, 7351 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) [2024-06-28 03:28:35,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:35,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:35,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:36,388 INFO L124 PetriNetUnfolderBase]: 3984/6051 cut-off events. [2024-06-28 03:28:36,388 INFO L125 PetriNetUnfolderBase]: For 638749/638751 co-relation queries the response was YES. [2024-06-28 03:28:36,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52562 conditions, 6051 events. 3984/6051 cut-off events. For 638749/638751 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32759 event pairs, 1603 based on Foata normal form. 4/6054 useless extension candidates. Maximal degree in co-relation 52428. Up to 5879 conditions per place. [2024-06-28 03:28:36,460 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 60 changer transitions 0/491 dead transitions. [2024-06-28 03:28:36,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 491 transitions, 8499 flow [2024-06-28 03:28:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:28:36,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-28 03:28:36,462 INFO L175 Difference]: Start difference. First operand has 295 places, 480 transitions, 7351 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:28:36,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 491 transitions, 8499 flow [2024-06-28 03:28:37,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 491 transitions, 8146 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-28 03:28:37,848 INFO L231 Difference]: Finished difference. Result has 294 places, 480 transitions, 7125 flow [2024-06-28 03:28:37,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6998, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7125, PETRI_PLACES=294, PETRI_TRANSITIONS=480} [2024-06-28 03:28:37,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-28 03:28:37,848 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 480 transitions, 7125 flow [2024-06-28 03:28:37,848 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) [2024-06-28 03:28:37,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:37,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:37,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:28:37,849 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:37,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash 580987246, now seen corresponding path program 7 times [2024-06-28 03:28:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:37,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838269030] [2024-06-28 03:28:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:38,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:38,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838269030] [2024-06-28 03:28:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838269030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:38,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328028280] [2024-06-28 03:28:38,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:38,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:38,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:38,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:38,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:28:38,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 480 transitions, 7125 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:38,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:38,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:28:38,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:40,054 INFO L124 PetriNetUnfolderBase]: 3879/5944 cut-off events. [2024-06-28 03:28:40,055 INFO L125 PetriNetUnfolderBase]: For 652371/652373 co-relation queries the response was YES. [2024-06-28 03:28:40,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51622 conditions, 5944 events. 3879/5944 cut-off events. For 652371/652373 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32648 event pairs, 1535 based on Foata normal form. 4/5947 useless extension candidates. Maximal degree in co-relation 51490. Up to 5666 conditions per place. [2024-06-28 03:28:40,128 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 36 changer transitions 0/491 dead transitions. [2024-06-28 03:28:40,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 491 transitions, 8102 flow [2024-06-28 03:28:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:40,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:28:40,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:28:40,129 INFO L175 Difference]: Start difference. First operand has 294 places, 480 transitions, 7125 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:28:40,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 491 transitions, 8102 flow [2024-06-28 03:28:41,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 491 transitions, 7804 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-28 03:28:41,514 INFO L231 Difference]: Finished difference. Result has 294 places, 481 transitions, 6921 flow [2024-06-28 03:28:41,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6921, PETRI_PLACES=294, PETRI_TRANSITIONS=481} [2024-06-28 03:28:41,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-28 03:28:41,514 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 481 transitions, 6921 flow [2024-06-28 03:28:41,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:28:41,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:41,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:41,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:28:41,515 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:41,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:41,515 INFO L85 PathProgramCache]: Analyzing trace with hash -887346133, now seen corresponding path program 1 times [2024-06-28 03:28:41,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:41,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778939113] [2024-06-28 03:28:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:41,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:42,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778939113] [2024-06-28 03:28:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778939113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:42,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:42,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672269590] [2024-06-28 03:28:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:42,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:42,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:42,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:42,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 481 transitions, 6921 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) [2024-06-28 03:28:42,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:42,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:42,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:43,712 INFO L124 PetriNetUnfolderBase]: 3988/6056 cut-off events. [2024-06-28 03:28:43,712 INFO L125 PetriNetUnfolderBase]: For 663876/663876 co-relation queries the response was YES. [2024-06-28 03:28:43,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52246 conditions, 6056 events. 3988/6056 cut-off events. For 663876/663876 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 32802 event pairs, 1600 based on Foata normal form. 2/6057 useless extension candidates. Maximal degree in co-relation 52114. Up to 5955 conditions per place. [2024-06-28 03:28:43,793 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 479 selfloop transitions, 20 changer transitions 0/502 dead transitions. [2024-06-28 03:28:43,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 502 transitions, 8039 flow [2024-06-28 03:28:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:28:43,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:28:43,794 INFO L175 Difference]: Start difference. First operand has 294 places, 481 transitions, 6921 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:28:43,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 502 transitions, 8039 flow [2024-06-28 03:28:45,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 502 transitions, 7928 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:28:45,218 INFO L231 Difference]: Finished difference. Result has 296 places, 484 transitions, 6910 flow [2024-06-28 03:28:45,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6810, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6910, PETRI_PLACES=296, PETRI_TRANSITIONS=484} [2024-06-28 03:28:45,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-28 03:28:45,219 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 484 transitions, 6910 flow [2024-06-28 03:28:45,219 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) [2024-06-28 03:28:45,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:45,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:28:45,219 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:45,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash -609396599, now seen corresponding path program 2 times [2024-06-28 03:28:45,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218052296] [2024-06-28 03:28:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:45,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218052296] [2024-06-28 03:28:45,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218052296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:45,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:45,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:45,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822457441] [2024-06-28 03:28:45,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:45,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:45,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:45,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:46,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:46,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 484 transitions, 6910 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) [2024-06-28 03:28:46,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:46,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:46,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:47,521 INFO L124 PetriNetUnfolderBase]: 4014/6092 cut-off events. [2024-06-28 03:28:47,521 INFO L125 PetriNetUnfolderBase]: For 686491/686491 co-relation queries the response was YES. [2024-06-28 03:28:47,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53193 conditions, 6092 events. 4014/6092 cut-off events. For 686491/686491 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 32960 event pairs, 1601 based on Foata normal form. 2/6093 useless extension candidates. Maximal degree in co-relation 53060. Up to 5926 conditions per place. [2024-06-28 03:28:47,605 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 463 selfloop transitions, 46 changer transitions 0/512 dead transitions. [2024-06-28 03:28:47,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 512 transitions, 8446 flow [2024-06-28 03:28:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 03:28:47,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:28:47,606 INFO L175 Difference]: Start difference. First operand has 296 places, 484 transitions, 6910 flow. Second operand 8 states and 136 transitions. [2024-06-28 03:28:47,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 512 transitions, 8446 flow [2024-06-28 03:28:49,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 512 transitions, 8370 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 03:28:49,291 INFO L231 Difference]: Finished difference. Result has 298 places, 493 transitions, 7100 flow [2024-06-28 03:28:49,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7100, PETRI_PLACES=298, PETRI_TRANSITIONS=493} [2024-06-28 03:28:49,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-28 03:28:49,292 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 493 transitions, 7100 flow [2024-06-28 03:28:49,292 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) [2024-06-28 03:28:49,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:49,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:28:49,293 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:49,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1596468712, now seen corresponding path program 1 times [2024-06-28 03:28:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:49,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042550688] [2024-06-28 03:28:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:50,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042550688] [2024-06-28 03:28:50,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042550688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:50,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:50,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:50,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436339449] [2024-06-28 03:28:50,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:50,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:50,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:50,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:50,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 493 transitions, 7100 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) [2024-06-28 03:28:50,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:50,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:50,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:51,789 INFO L124 PetriNetUnfolderBase]: 4029/6113 cut-off events. [2024-06-28 03:28:51,789 INFO L125 PetriNetUnfolderBase]: For 710065/710065 co-relation queries the response was YES. [2024-06-28 03:28:51,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53971 conditions, 6113 events. 4029/6113 cut-off events. For 710065/710065 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33075 event pairs, 1602 based on Foata normal form. 3/6115 useless extension candidates. Maximal degree in co-relation 53837. Up to 5985 conditions per place. [2024-06-28 03:28:51,860 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 480 selfloop transitions, 35 changer transitions 0/518 dead transitions. [2024-06-28 03:28:51,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 518 transitions, 8444 flow [2024-06-28 03:28:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:28:51,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:28:51,862 INFO L175 Difference]: Start difference. First operand has 298 places, 493 transitions, 7100 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:28:51,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 518 transitions, 8444 flow [2024-06-28 03:28:53,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 518 transitions, 8358 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 03:28:53,158 INFO L231 Difference]: Finished difference. Result has 303 places, 499 transitions, 7196 flow [2024-06-28 03:28:53,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7014, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7196, PETRI_PLACES=303, PETRI_TRANSITIONS=499} [2024-06-28 03:28:53,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-28 03:28:53,158 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 499 transitions, 7196 flow [2024-06-28 03:28:53,159 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) [2024-06-28 03:28:53,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:53,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:53,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:28:53,159 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:53,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash -609391019, now seen corresponding path program 3 times [2024-06-28 03:28:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:53,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027351701] [2024-06-28 03:28:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:53,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:53,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027351701] [2024-06-28 03:28:53,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027351701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:53,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:53,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:53,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040990192] [2024-06-28 03:28:53,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:53,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:53,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:53,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:53,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 499 transitions, 7196 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) [2024-06-28 03:28:53,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:53,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:53,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:55,491 INFO L124 PetriNetUnfolderBase]: 4023/6105 cut-off events. [2024-06-28 03:28:55,491 INFO L125 PetriNetUnfolderBase]: For 721261/721261 co-relation queries the response was YES. [2024-06-28 03:28:55,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54346 conditions, 6105 events. 4023/6105 cut-off events. For 721261/721261 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33083 event pairs, 1599 based on Foata normal form. 2/6106 useless extension candidates. Maximal degree in co-relation 54210. Up to 5942 conditions per place. [2024-06-28 03:28:55,576 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 47 changer transitions 0/517 dead transitions. [2024-06-28 03:28:55,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 517 transitions, 8438 flow [2024-06-28 03:28:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:28:55,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 03:28:55,577 INFO L175 Difference]: Start difference. First operand has 303 places, 499 transitions, 7196 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:28:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 517 transitions, 8438 flow [2024-06-28 03:28:57,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 517 transitions, 8339 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 03:28:57,393 INFO L231 Difference]: Finished difference. Result has 307 places, 499 transitions, 7197 flow [2024-06-28 03:28:57,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7097, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7197, PETRI_PLACES=307, PETRI_TRANSITIONS=499} [2024-06-28 03:28:57,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-28 03:28:57,394 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 499 transitions, 7197 flow [2024-06-28 03:28:57,394 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) [2024-06-28 03:28:57,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:57,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:28:57,394 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:57,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2051264944, now seen corresponding path program 2 times [2024-06-28 03:28:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330766612] [2024-06-28 03:28:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:58,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:58,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330766612] [2024-06-28 03:28:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330766612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:58,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:58,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:28:58,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880321009] [2024-06-28 03:28:58,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:58,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:28:58,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:28:58,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:28:58,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:28:58,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 499 transitions, 7197 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) [2024-06-28 03:28:58,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:58,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:28:58,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:59,636 INFO L124 PetriNetUnfolderBase]: 4038/6127 cut-off events. [2024-06-28 03:28:59,637 INFO L125 PetriNetUnfolderBase]: For 742069/742071 co-relation queries the response was YES. [2024-06-28 03:28:59,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54728 conditions, 6127 events. 4038/6127 cut-off events. For 742069/742071 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33155 event pairs, 1600 based on Foata normal form. 5/6131 useless extension candidates. Maximal degree in co-relation 54590. Up to 5991 conditions per place. [2024-06-28 03:28:59,716 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 41 changer transitions 0/517 dead transitions. [2024-06-28 03:28:59,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 517 transitions, 8477 flow [2024-06-28 03:28:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:28:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:28:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:28:59,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 03:28:59,717 INFO L175 Difference]: Start difference. First operand has 307 places, 499 transitions, 7197 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:28:59,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 517 transitions, 8477 flow [2024-06-28 03:29:01,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 517 transitions, 8395 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:01,495 INFO L231 Difference]: Finished difference. Result has 309 places, 502 transitions, 7256 flow [2024-06-28 03:29:01,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7115, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7256, PETRI_PLACES=309, PETRI_TRANSITIONS=502} [2024-06-28 03:29:01,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-28 03:29:01,496 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 502 transitions, 7256 flow [2024-06-28 03:29:01,496 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) [2024-06-28 03:29:01,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:01,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:01,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:29:01,496 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:01,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:01,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1190278957, now seen corresponding path program 4 times [2024-06-28 03:29:01,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:01,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105545160] [2024-06-28 03:29:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:01,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:02,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:02,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105545160] [2024-06-28 03:29:02,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105545160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:02,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:02,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:02,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224297317] [2024-06-28 03:29:02,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:02,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:02,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:02,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:02,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 502 transitions, 7256 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) [2024-06-28 03:29:02,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:02,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:02,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:03,831 INFO L124 PetriNetUnfolderBase]: 4048/6141 cut-off events. [2024-06-28 03:29:03,832 INFO L125 PetriNetUnfolderBase]: For 758577/758579 co-relation queries the response was YES. [2024-06-28 03:29:03,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55086 conditions, 6141 events. 4048/6141 cut-off events. For 758577/758579 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33244 event pairs, 1609 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 54947. Up to 5973 conditions per place. [2024-06-28 03:29:03,908 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 52 changer transitions 0/519 dead transitions. [2024-06-28 03:29:03,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 519 transitions, 8547 flow [2024-06-28 03:29:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:29:03,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 03:29:03,909 INFO L175 Difference]: Start difference. First operand has 309 places, 502 transitions, 7256 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:29:03,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 519 transitions, 8547 flow [2024-06-28 03:29:05,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 519 transitions, 8425 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:05,608 INFO L231 Difference]: Finished difference. Result has 312 places, 505 transitions, 7305 flow [2024-06-28 03:29:05,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7134, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7305, PETRI_PLACES=312, PETRI_TRANSITIONS=505} [2024-06-28 03:29:05,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 03:29:05,609 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 505 transitions, 7305 flow [2024-06-28 03:29:05,609 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) [2024-06-28 03:29:05,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:05,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:05,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:29:05,610 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:05,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash 594070672, now seen corresponding path program 3 times [2024-06-28 03:29:05,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:05,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675690807] [2024-06-28 03:29:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:05,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:06,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:06,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675690807] [2024-06-28 03:29:06,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675690807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:06,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:06,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734075247] [2024-06-28 03:29:06,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:06,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:06,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:06,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:06,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 505 transitions, 7305 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) [2024-06-28 03:29:06,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:06,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:06,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:07,951 INFO L124 PetriNetUnfolderBase]: 4063/6162 cut-off events. [2024-06-28 03:29:07,951 INFO L125 PetriNetUnfolderBase]: For 779192/779194 co-relation queries the response was YES. [2024-06-28 03:29:08,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55292 conditions, 6162 events. 4063/6162 cut-off events. For 779192/779194 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33325 event pairs, 1602 based on Foata normal form. 5/6166 useless extension candidates. Maximal degree in co-relation 55152. Up to 6019 conditions per place. [2024-06-28 03:29:08,032 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 480 selfloop transitions, 42 changer transitions 0/525 dead transitions. [2024-06-28 03:29:08,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 525 transitions, 8596 flow [2024-06-28 03:29:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:29:08,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:29:08,033 INFO L175 Difference]: Start difference. First operand has 312 places, 505 transitions, 7305 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:29:08,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 525 transitions, 8596 flow [2024-06-28 03:29:10,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 525 transitions, 8467 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:10,032 INFO L231 Difference]: Finished difference. Result has 315 places, 508 transitions, 7301 flow [2024-06-28 03:29:10,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7176, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7301, PETRI_PLACES=315, PETRI_TRANSITIONS=508} [2024-06-28 03:29:10,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-28 03:29:10,033 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 508 transitions, 7301 flow [2024-06-28 03:29:10,033 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) [2024-06-28 03:29:10,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:10,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:10,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:29:10,033 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:10,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:10,034 INFO L85 PathProgramCache]: Analyzing trace with hash 586713225, now seen corresponding path program 5 times [2024-06-28 03:29:10,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:10,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347296219] [2024-06-28 03:29:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:10,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:10,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:10,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347296219] [2024-06-28 03:29:10,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347296219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:10,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:10,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:10,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527980896] [2024-06-28 03:29:10,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:10,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:10,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:10,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:10,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:10,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 508 transitions, 7301 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) [2024-06-28 03:29:10,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:10,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:10,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:12,335 INFO L124 PetriNetUnfolderBase]: 4073/6176 cut-off events. [2024-06-28 03:29:12,335 INFO L125 PetriNetUnfolderBase]: For 794966/794968 co-relation queries the response was YES. [2024-06-28 03:29:12,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55557 conditions, 6176 events. 4073/6176 cut-off events. For 794966/794968 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33430 event pairs, 1613 based on Foata normal form. 2/6177 useless extension candidates. Maximal degree in co-relation 55416. Up to 6004 conditions per place. [2024-06-28 03:29:12,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 53 changer transitions 0/525 dead transitions. [2024-06-28 03:29:12,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 525 transitions, 8601 flow [2024-06-28 03:29:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:29:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:29:12,417 INFO L175 Difference]: Start difference. First operand has 315 places, 508 transitions, 7301 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:29:12,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 525 transitions, 8601 flow [2024-06-28 03:29:14,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 525 transitions, 8521 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:14,208 INFO L231 Difference]: Finished difference. Result has 318 places, 511 transitions, 7387 flow [2024-06-28 03:29:14,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7221, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7387, PETRI_PLACES=318, PETRI_TRANSITIONS=511} [2024-06-28 03:29:14,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-28 03:29:14,208 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 511 transitions, 7387 flow [2024-06-28 03:29:14,208 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) [2024-06-28 03:29:14,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:14,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:14,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:29:14,209 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:14,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash 586718805, now seen corresponding path program 6 times [2024-06-28 03:29:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:14,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790762620] [2024-06-28 03:29:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:14,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:14,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790762620] [2024-06-28 03:29:14,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790762620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:14,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:14,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:14,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470501199] [2024-06-28 03:29:14,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:14,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:14,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:14,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:14,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 511 transitions, 7387 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) [2024-06-28 03:29:14,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:14,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:14,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:16,475 INFO L124 PetriNetUnfolderBase]: 4067/6168 cut-off events. [2024-06-28 03:29:16,475 INFO L125 PetriNetUnfolderBase]: For 807625/807627 co-relation queries the response was YES. [2024-06-28 03:29:16,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55570 conditions, 6168 events. 4067/6168 cut-off events. For 807625/807627 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33368 event pairs, 1612 based on Foata normal form. 2/6169 useless extension candidates. Maximal degree in co-relation 55428. Up to 5999 conditions per place. [2024-06-28 03:29:16,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 52 changer transitions 0/525 dead transitions. [2024-06-28 03:29:16,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 525 transitions, 8479 flow [2024-06-28 03:29:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:29:16,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:29:16,561 INFO L175 Difference]: Start difference. First operand has 318 places, 511 transitions, 7387 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:29:16,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 525 transitions, 8479 flow [2024-06-28 03:29:18,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 525 transitions, 8269 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 03:29:18,947 INFO L231 Difference]: Finished difference. Result has 319 places, 511 transitions, 7287 flow [2024-06-28 03:29:18,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7287, PETRI_PLACES=319, PETRI_TRANSITIONS=511} [2024-06-28 03:29:18,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 03:29:18,948 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 511 transitions, 7287 flow [2024-06-28 03:29:18,948 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) [2024-06-28 03:29:18,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:18,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:18,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:29:18,948 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)] === [2024-06-28 03:29:18,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:18,948 INFO L85 PathProgramCache]: Analyzing trace with hash 586719022, now seen corresponding path program 4 times [2024-06-28 03:29:18,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099176034] [2024-06-28 03:29:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:18,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099176034] [2024-06-28 03:29:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099176034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:19,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:19,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814852900] [2024-06-28 03:29:19,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:19,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:19,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 511 transitions, 7287 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) [2024-06-28 03:29:19,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:19,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:19,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:21,308 INFO L124 PetriNetUnfolderBase]: 4058/6156 cut-off events. [2024-06-28 03:29:21,308 INFO L125 PetriNetUnfolderBase]: For 818462/818464 co-relation queries the response was YES. [2024-06-28 03:29:21,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55391 conditions, 6156 events. 4058/6156 cut-off events. For 818462/818464 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33397 event pairs, 1599 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 55248. Up to 6018 conditions per place. [2024-06-28 03:29:21,384 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 483 selfloop transitions, 41 changer transitions 0/527 dead transitions. [2024-06-28 03:29:21,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 527 transitions, 8391 flow [2024-06-28 03:29:21,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:29:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:29:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:29:21,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:29:21,386 INFO L175 Difference]: Start difference. First operand has 319 places, 511 transitions, 7287 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:29:21,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 527 transitions, 8391 flow [2024-06-28 03:29:23,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 527 transitions, 8231 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 03:29:23,363 INFO L231 Difference]: Finished difference. Result has 319 places, 511 transitions, 7215 flow [2024-06-28 03:29:23,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7215, PETRI_PLACES=319, PETRI_TRANSITIONS=511} [2024-06-28 03:29:23,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-28 03:29:23,364 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 511 transitions, 7215 flow [2024-06-28 03:29:23,364 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) [2024-06-28 03:29:23,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:23,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:23,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:29:23,364 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)] === [2024-06-28 03:29:23,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:23,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1574444750, now seen corresponding path program 1 times [2024-06-28 03:29:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:23,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204456578] [2024-06-28 03:29:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:23,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204456578] [2024-06-28 03:29:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204456578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:24,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:24,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:24,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846019782] [2024-06-28 03:29:24,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:24,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:24,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:24,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:24,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 511 transitions, 7215 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:24,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:24,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:24,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:25,659 INFO L124 PetriNetUnfolderBase]: 4020/6147 cut-off events. [2024-06-28 03:29:25,659 INFO L125 PetriNetUnfolderBase]: For 848153/848165 co-relation queries the response was YES. [2024-06-28 03:29:25,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55815 conditions, 6147 events. 4020/6147 cut-off events. For 848153/848165 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33711 event pairs, 811 based on Foata normal form. 16/6162 useless extension candidates. Maximal degree in co-relation 55671. Up to 5204 conditions per place. [2024-06-28 03:29:25,744 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 353 selfloop transitions, 178 changer transitions 0/562 dead transitions. [2024-06-28 03:29:25,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 562 transitions, 8976 flow [2024-06-28 03:29:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:29:25,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 03:29:25,746 INFO L175 Difference]: Start difference. First operand has 319 places, 511 transitions, 7215 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:29:25,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 562 transitions, 8976 flow [2024-06-28 03:29:27,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 562 transitions, 8837 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 03:29:27,937 INFO L231 Difference]: Finished difference. Result has 322 places, 527 transitions, 7818 flow [2024-06-28 03:29:27,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7818, PETRI_PLACES=322, PETRI_TRANSITIONS=527} [2024-06-28 03:29:27,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-28 03:29:27,938 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 527 transitions, 7818 flow [2024-06-28 03:29:27,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:27,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:27,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:27,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:29:27,938 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)] === [2024-06-28 03:29:27,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1176391406, now seen corresponding path program 2 times [2024-06-28 03:29:27,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:27,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399196106] [2024-06-28 03:29:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:27,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:28,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:28,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399196106] [2024-06-28 03:29:28,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399196106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:28,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:28,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:28,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948852962] [2024-06-28 03:29:28,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:28,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:28,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:28,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:28,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:28,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 527 transitions, 7818 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:28,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:28,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:28,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:30,326 INFO L124 PetriNetUnfolderBase]: 4140/6333 cut-off events. [2024-06-28 03:29:30,326 INFO L125 PetriNetUnfolderBase]: For 892274/892292 co-relation queries the response was YES. [2024-06-28 03:29:30,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59282 conditions, 6333 events. 4140/6333 cut-off events. For 892274/892292 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35237 event pairs, 1110 based on Foata normal form. 22/6354 useless extension candidates. Maximal degree in co-relation 59134. Up to 5421 conditions per place. [2024-06-28 03:29:30,415 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 190 changer transitions 0/582 dead transitions. [2024-06-28 03:29:30,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 582 transitions, 9741 flow [2024-06-28 03:29:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:29:30,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-28 03:29:30,416 INFO L175 Difference]: Start difference. First operand has 322 places, 527 transitions, 7818 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:29:30,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 582 transitions, 9741 flow [2024-06-28 03:29:32,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 582 transitions, 9345 flow, removed 132 selfloop flow, removed 3 redundant places. [2024-06-28 03:29:32,418 INFO L231 Difference]: Finished difference. Result has 330 places, 547 transitions, 8285 flow [2024-06-28 03:29:32,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8285, PETRI_PLACES=330, PETRI_TRANSITIONS=547} [2024-06-28 03:29:32,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-28 03:29:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 547 transitions, 8285 flow [2024-06-28 03:29:32,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:32,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:32,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:32,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:29:32,419 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)] === [2024-06-28 03:29:32,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1159517176, now seen corresponding path program 1 times [2024-06-28 03:29:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:32,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532789639] [2024-06-28 03:29:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532789639] [2024-06-28 03:29:33,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532789639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:33,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:33,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:33,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650909551] [2024-06-28 03:29:33,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:33,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:33,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:33,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:33,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 547 transitions, 8285 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:33,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:33,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:33,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:34,900 INFO L124 PetriNetUnfolderBase]: 4282/6498 cut-off events. [2024-06-28 03:29:34,900 INFO L125 PetriNetUnfolderBase]: For 907273/907290 co-relation queries the response was YES. [2024-06-28 03:29:34,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60828 conditions, 6498 events. 4282/6498 cut-off events. For 907273/907290 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35688 event pairs, 1312 based on Foata normal form. 18/6515 useless extension candidates. Maximal degree in co-relation 60676. Up to 5640 conditions per place. [2024-06-28 03:29:34,994 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 346 selfloop transitions, 247 changer transitions 0/596 dead transitions. [2024-06-28 03:29:34,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 596 transitions, 10197 flow [2024-06-28 03:29:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:29:34,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:29:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 03:29:34,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-28 03:29:34,995 INFO L175 Difference]: Start difference. First operand has 330 places, 547 transitions, 8285 flow. Second operand 10 states and 183 transitions. [2024-06-28 03:29:34,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 596 transitions, 10197 flow [2024-06-28 03:29:37,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 596 transitions, 10008 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:37,798 INFO L231 Difference]: Finished difference. Result has 339 places, 564 transitions, 8956 flow [2024-06-28 03:29:37,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8102, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8956, PETRI_PLACES=339, PETRI_TRANSITIONS=564} [2024-06-28 03:29:37,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-28 03:29:37,798 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 564 transitions, 8956 flow [2024-06-28 03:29:37,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:37,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:37,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:37,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:29:37,799 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)] === [2024-06-28 03:29:37,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:37,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1159508186, now seen corresponding path program 3 times [2024-06-28 03:29:37,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:37,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111731619] [2024-06-28 03:29:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:37,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:38,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:38,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111731619] [2024-06-28 03:29:38,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111731619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:38,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:38,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:38,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659986054] [2024-06-28 03:29:38,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:38,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:38,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:38,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:38,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 564 transitions, 8956 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:38,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:38,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:38,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:40,395 INFO L124 PetriNetUnfolderBase]: 4189/6399 cut-off events. [2024-06-28 03:29:40,396 INFO L125 PetriNetUnfolderBase]: For 930023/930049 co-relation queries the response was YES. [2024-06-28 03:29:40,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61766 conditions, 6399 events. 4189/6399 cut-off events. For 930023/930049 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35502 event pairs, 1115 based on Foata normal form. 30/6428 useless extension candidates. Maximal degree in co-relation 61610. Up to 5524 conditions per place. [2024-06-28 03:29:40,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 193 changer transitions 0/594 dead transitions. [2024-06-28 03:29:40,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 594 transitions, 10390 flow [2024-06-28 03:29:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:29:40,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 03:29:40,486 INFO L175 Difference]: Start difference. First operand has 339 places, 564 transitions, 8956 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:29:40,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 594 transitions, 10390 flow [2024-06-28 03:29:43,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 594 transitions, 9983 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-28 03:29:43,519 INFO L231 Difference]: Finished difference. Result has 345 places, 566 transitions, 8992 flow [2024-06-28 03:29:43,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8549, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8992, PETRI_PLACES=345, PETRI_TRANSITIONS=566} [2024-06-28 03:29:43,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 03:29:43,519 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 566 transitions, 8992 flow [2024-06-28 03:29:43,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:43,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:43,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:43,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:29:43,520 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)] === [2024-06-28 03:29:43,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1475533224, now seen corresponding path program 2 times [2024-06-28 03:29:43,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:43,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113898493] [2024-06-28 03:29:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:43,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:44,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113898493] [2024-06-28 03:29:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113898493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:44,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:44,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:44,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573692148] [2024-06-28 03:29:44,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:44,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:44,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:44,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:44,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 566 transitions, 8992 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:44,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:44,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:44,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:46,231 INFO L124 PetriNetUnfolderBase]: 4309/6537 cut-off events. [2024-06-28 03:29:46,231 INFO L125 PetriNetUnfolderBase]: For 939248/939265 co-relation queries the response was YES. [2024-06-28 03:29:46,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63066 conditions, 6537 events. 4309/6537 cut-off events. For 939248/939265 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 35974 event pairs, 1327 based on Foata normal form. 18/6554 useless extension candidates. Maximal degree in co-relation 62907. Up to 5838 conditions per place. [2024-06-28 03:29:46,314 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 376 selfloop transitions, 235 changer transitions 0/614 dead transitions. [2024-06-28 03:29:46,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 614 transitions, 10725 flow [2024-06-28 03:29:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:29:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:29:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-28 03:29:46,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:29:46,315 INFO L175 Difference]: Start difference. First operand has 345 places, 566 transitions, 8992 flow. Second operand 12 states and 204 transitions. [2024-06-28 03:29:46,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 614 transitions, 10725 flow [2024-06-28 03:29:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 614 transitions, 10338 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:29:48,759 INFO L231 Difference]: Finished difference. Result has 353 places, 583 transitions, 9366 flow [2024-06-28 03:29:48,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8614, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9366, PETRI_PLACES=353, PETRI_TRANSITIONS=583} [2024-06-28 03:29:48,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-28 03:29:48,760 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 583 transitions, 9366 flow [2024-06-28 03:29:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:48,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:48,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:48,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:29:48,761 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)] === [2024-06-28 03:29:48,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1314297484, now seen corresponding path program 1 times [2024-06-28 03:29:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629115816] [2024-06-28 03:29:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:48,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629115816] [2024-06-28 03:29:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629115816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:49,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:49,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228350606] [2024-06-28 03:29:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:49,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:29:49,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 583 transitions, 9366 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:49,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:49,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:29:49,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:51,678 INFO L124 PetriNetUnfolderBase]: 4363/6612 cut-off events. [2024-06-28 03:29:51,678 INFO L125 PetriNetUnfolderBase]: For 987906/987923 co-relation queries the response was YES. [2024-06-28 03:29:51,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64398 conditions, 6612 events. 4363/6612 cut-off events. For 987906/987923 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36429 event pairs, 1330 based on Foata normal form. 22/6633 useless extension candidates. Maximal degree in co-relation 64236. Up to 5823 conditions per place. [2024-06-28 03:29:51,762 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 421 selfloop transitions, 213 changer transitions 0/637 dead transitions. [2024-06-28 03:29:51,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 637 transitions, 11388 flow [2024-06-28 03:29:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:29:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:29:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 03:29:51,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 03:29:51,763 INFO L175 Difference]: Start difference. First operand has 353 places, 583 transitions, 9366 flow. Second operand 10 states and 182 transitions. [2024-06-28 03:29:51,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 637 transitions, 11388 flow [2024-06-28 03:29:54,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 637 transitions, 11103 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 03:29:54,186 INFO L231 Difference]: Finished difference. Result has 358 places, 608 transitions, 9996 flow [2024-06-28 03:29:54,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9081, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9996, PETRI_PLACES=358, PETRI_TRANSITIONS=608} [2024-06-28 03:29:54,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-28 03:29:54,187 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 608 transitions, 9996 flow [2024-06-28 03:29:54,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:54,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:54,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:54,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:29:54,188 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)] === [2024-06-28 03:29:54,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1931238606, now seen corresponding path program 1 times [2024-06-28 03:29:54,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:54,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144510908] [2024-06-28 03:29:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:54,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:54,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144510908] [2024-06-28 03:29:54,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144510908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:54,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:29:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650480063] [2024-06-28 03:29:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:29:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:29:54,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:29:55,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:29:55,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 608 transitions, 9996 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:29:55,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:55,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:29:55,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:56,846 INFO L124 PetriNetUnfolderBase]: 4367/6656 cut-off events. [2024-06-28 03:29:56,846 INFO L125 PetriNetUnfolderBase]: For 1010981/1011016 co-relation queries the response was YES. [2024-06-28 03:29:56,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66534 conditions, 6656 events. 4367/6656 cut-off events. For 1010981/1011016 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 37091 event pairs, 1115 based on Foata normal form. 34/6689 useless extension candidates. Maximal degree in co-relation 66369. Up to 5926 conditions per place. [2024-06-28 03:29:56,950 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 544 selfloop transitions, 92 changer transitions 0/672 dead transitions. [2024-06-28 03:29:56,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 672 transitions, 11900 flow [2024-06-28 03:29:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:29:56,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:29:56,951 INFO L175 Difference]: Start difference. First operand has 358 places, 608 transitions, 9996 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:29:56,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 672 transitions, 11900 flow [2024-06-28 03:30:00,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 672 transitions, 11753 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-28 03:30:00,262 INFO L231 Difference]: Finished difference. Result has 366 places, 639 transitions, 10632 flow [2024-06-28 03:30:00,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9851, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10632, PETRI_PLACES=366, PETRI_TRANSITIONS=639} [2024-06-28 03:30:00,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-28 03:30:00,263 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 639 transitions, 10632 flow [2024-06-28 03:30:00,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:00,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:00,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:00,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:30:00,263 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:00,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1927939856, now seen corresponding path program 2 times [2024-06-28 03:30:00,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:00,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452547432] [2024-06-28 03:30:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:00,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:00,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452547432] [2024-06-28 03:30:00,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452547432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:00,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:00,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:30:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141626694] [2024-06-28 03:30:00,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:00,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:30:00,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:30:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:30:01,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 639 transitions, 10632 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:01,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:01,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:01,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:03,147 INFO L124 PetriNetUnfolderBase]: 4447/6767 cut-off events. [2024-06-28 03:30:03,147 INFO L125 PetriNetUnfolderBase]: For 1069883/1069924 co-relation queries the response was YES. [2024-06-28 03:30:03,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69513 conditions, 6767 events. 4447/6767 cut-off events. For 1069883/1069924 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 37730 event pairs, 1145 based on Foata normal form. 40/6806 useless extension candidates. Maximal degree in co-relation 69342. Up to 5676 conditions per place. [2024-06-28 03:30:03,250 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 511 selfloop transitions, 150 changer transitions 0/697 dead transitions. [2024-06-28 03:30:03,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 697 transitions, 13051 flow [2024-06-28 03:30:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:30:03,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-28 03:30:03,251 INFO L175 Difference]: Start difference. First operand has 366 places, 639 transitions, 10632 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:30:03,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 697 transitions, 13051 flow [2024-06-28 03:30:06,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 697 transitions, 12835 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 03:30:06,334 INFO L231 Difference]: Finished difference. Result has 373 places, 660 transitions, 11170 flow [2024-06-28 03:30:06,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10416, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11170, PETRI_PLACES=373, PETRI_TRANSITIONS=660} [2024-06-28 03:30:06,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-28 03:30:06,335 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 660 transitions, 11170 flow [2024-06-28 03:30:06,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:06,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:06,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:06,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:30:06,336 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1927939670, now seen corresponding path program 1 times [2024-06-28 03:30:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:06,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857641327] [2024-06-28 03:30:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:07,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:07,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857641327] [2024-06-28 03:30:07,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857641327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:07,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:07,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:30:07,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709407275] [2024-06-28 03:30:07,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:07,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:30:07,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:30:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:30:07,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:30:07,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 660 transitions, 11170 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) [2024-06-28 03:30:07,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:07,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:30:07,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:09,060 INFO L124 PetriNetUnfolderBase]: 4563/6895 cut-off events. [2024-06-28 03:30:09,061 INFO L125 PetriNetUnfolderBase]: For 1098852/1098893 co-relation queries the response was YES. [2024-06-28 03:30:09,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72037 conditions, 6895 events. 4563/6895 cut-off events. For 1098852/1098893 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 38113 event pairs, 1249 based on Foata normal form. 40/6934 useless extension candidates. Maximal degree in co-relation 71863. Up to 6256 conditions per place. [2024-06-28 03:30:09,182 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 512 selfloop transitions, 178 changer transitions 0/693 dead transitions. [2024-06-28 03:30:09,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 693 transitions, 13347 flow [2024-06-28 03:30:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:30:09,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-28 03:30:09,183 INFO L175 Difference]: Start difference. First operand has 373 places, 660 transitions, 11170 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:30:09,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 693 transitions, 13347 flow [2024-06-28 03:30:12,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 693 transitions, 13218 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-28 03:30:12,350 INFO L231 Difference]: Finished difference. Result has 381 places, 669 transitions, 11661 flow [2024-06-28 03:30:12,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11041, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11661, PETRI_PLACES=381, PETRI_TRANSITIONS=669} [2024-06-28 03:30:12,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-28 03:30:12,350 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 669 transitions, 11661 flow [2024-06-28 03:30:12,350 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) [2024-06-28 03:30:12,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:12,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:12,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:30:12,351 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:12,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1350675622, now seen corresponding path program 2 times [2024-06-28 03:30:12,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:12,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542814336] [2024-06-28 03:30:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:12,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:13,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:13,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542814336] [2024-06-28 03:30:13,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542814336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:13,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:13,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:30:13,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89606787] [2024-06-28 03:30:13,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:13,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:30:13,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:13,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:30:13,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:30:13,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:30:13,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 669 transitions, 11661 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) [2024-06-28 03:30:13,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:13,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:30:13,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:15,213 INFO L124 PetriNetUnfolderBase]: 4573/6912 cut-off events. [2024-06-28 03:30:15,213 INFO L125 PetriNetUnfolderBase]: For 1123366/1123407 co-relation queries the response was YES. [2024-06-28 03:30:15,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72951 conditions, 6912 events. 4573/6912 cut-off events. For 1123366/1123407 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 38227 event pairs, 1239 based on Foata normal form. 40/6951 useless extension candidates. Maximal degree in co-relation 72773. Up to 6266 conditions per place. [2024-06-28 03:30:15,314 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 512 selfloop transitions, 179 changer transitions 0/694 dead transitions. [2024-06-28 03:30:15,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 694 transitions, 13575 flow [2024-06-28 03:30:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 03:30:15,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 03:30:15,316 INFO L175 Difference]: Start difference. First operand has 381 places, 669 transitions, 11661 flow. Second operand 9 states and 157 transitions. [2024-06-28 03:30:15,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 694 transitions, 13575 flow [2024-06-28 03:30:18,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 694 transitions, 13311 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:30:18,663 INFO L231 Difference]: Finished difference. Result has 385 places, 673 transitions, 11858 flow [2024-06-28 03:30:18,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11404, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11858, PETRI_PLACES=385, PETRI_TRANSITIONS=673} [2024-06-28 03:30:18,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-28 03:30:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 673 transitions, 11858 flow [2024-06-28 03:30:18,664 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) [2024-06-28 03:30:18,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:18,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:30:18,665 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash 824031502, now seen corresponding path program 3 times [2024-06-28 03:30:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101964878] [2024-06-28 03:30:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:19,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101964878] [2024-06-28 03:30:19,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101964878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:19,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:19,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:30:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712171579] [2024-06-28 03:30:19,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:30:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:30:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:30:19,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:30:19,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 673 transitions, 11858 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) [2024-06-28 03:30:19,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:19,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:30:19,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:21,363 INFO L124 PetriNetUnfolderBase]: 4567/6904 cut-off events. [2024-06-28 03:30:21,364 INFO L125 PetriNetUnfolderBase]: For 1139894/1139935 co-relation queries the response was YES. [2024-06-28 03:30:21,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73034 conditions, 6904 events. 4567/6904 cut-off events. For 1139894/1139935 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 38190 event pairs, 1225 based on Foata normal form. 40/6943 useless extension candidates. Maximal degree in co-relation 72855. Up to 6261 conditions per place. [2024-06-28 03:30:21,471 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 515 selfloop transitions, 176 changer transitions 0/694 dead transitions. [2024-06-28 03:30:21,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 694 transitions, 13686 flow [2024-06-28 03:30:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:30:21,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 03:30:21,472 INFO L175 Difference]: Start difference. First operand has 385 places, 673 transitions, 11858 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:30:21,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 694 transitions, 13686 flow [2024-06-28 03:30:25,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 694 transitions, 13345 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 03:30:25,175 INFO L231 Difference]: Finished difference. Result has 388 places, 673 transitions, 11877 flow [2024-06-28 03:30:25,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11517, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11877, PETRI_PLACES=388, PETRI_TRANSITIONS=673} [2024-06-28 03:30:25,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-28 03:30:25,175 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 673 transitions, 11877 flow [2024-06-28 03:30:25,176 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) [2024-06-28 03:30:25,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:25,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:25,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:30:25,176 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:25,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:25,176 INFO L85 PathProgramCache]: Analyzing trace with hash 824031316, now seen corresponding path program 3 times [2024-06-28 03:30:25,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:25,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312182715] [2024-06-28 03:30:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:25,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312182715] [2024-06-28 03:30:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312182715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:25,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:25,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:30:25,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201996899] [2024-06-28 03:30:25,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:25,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:30:25,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:25,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:30:25,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:30:25,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:25,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 673 transitions, 11877 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:25,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:25,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:25,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:27,921 INFO L124 PetriNetUnfolderBase]: 4465/6797 cut-off events. [2024-06-28 03:30:27,921 INFO L125 PetriNetUnfolderBase]: For 1158600/1158641 co-relation queries the response was YES. [2024-06-28 03:30:28,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72345 conditions, 6797 events. 4465/6797 cut-off events. For 1158600/1158641 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37965 event pairs, 1144 based on Foata normal form. 40/6836 useless extension candidates. Maximal degree in co-relation 72165. Up to 5698 conditions per place. [2024-06-28 03:30:28,039 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 516 selfloop transitions, 150 changer transitions 0/705 dead transitions. [2024-06-28 03:30:28,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 705 transitions, 13815 flow [2024-06-28 03:30:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:30:28,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-28 03:30:28,040 INFO L175 Difference]: Start difference. First operand has 388 places, 673 transitions, 11877 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:30:28,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 705 transitions, 13815 flow [2024-06-28 03:30:32,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 705 transitions, 13455 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 03:30:32,123 INFO L231 Difference]: Finished difference. Result has 390 places, 673 transitions, 11825 flow [2024-06-28 03:30:32,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11517, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11825, PETRI_PLACES=390, PETRI_TRANSITIONS=673} [2024-06-28 03:30:32,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-28 03:30:32,124 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 673 transitions, 11825 flow [2024-06-28 03:30:32,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:32,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:32,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:32,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:30:32,124 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)] === [2024-06-28 03:30:32,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash -251931284, now seen corresponding path program 4 times [2024-06-28 03:30:32,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:32,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342727886] [2024-06-28 03:30:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:32,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:33,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:33,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342727886] [2024-06-28 03:30:33,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342727886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:33,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:33,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:30:33,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941331692] [2024-06-28 03:30:33,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:33,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:30:33,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:30:33,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:30:33,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:33,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 673 transitions, 11825 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:33,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:33,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:33,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:35,594 INFO L124 PetriNetUnfolderBase]: 4714/7176 cut-off events. [2024-06-28 03:30:35,594 INFO L125 PetriNetUnfolderBase]: For 1199786/1199805 co-relation queries the response was YES. [2024-06-28 03:30:35,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75392 conditions, 7176 events. 4714/7176 cut-off events. For 1199786/1199805 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 40619 event pairs, 1185 based on Foata normal form. 22/7197 useless extension candidates. Maximal degree in co-relation 75211. Up to 6269 conditions per place. [2024-06-28 03:30:35,705 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 520 selfloop transitions, 195 changer transitions 0/754 dead transitions. [2024-06-28 03:30:35,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 754 transitions, 14206 flow [2024-06-28 03:30:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:30:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:30:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 03:30:35,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:30:35,707 INFO L175 Difference]: Start difference. First operand has 390 places, 673 transitions, 11825 flow. Second operand 10 states and 190 transitions. [2024-06-28 03:30:35,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 754 transitions, 14206 flow [2024-06-28 03:30:40,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 754 transitions, 13908 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:30:40,505 INFO L231 Difference]: Finished difference. Result has 395 places, 717 transitions, 12664 flow [2024-06-28 03:30:40,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11527, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12664, PETRI_PLACES=395, PETRI_TRANSITIONS=717} [2024-06-28 03:30:40,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-28 03:30:40,505 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 717 transitions, 12664 flow [2024-06-28 03:30:40,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:40,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:40,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:40,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:30:40,506 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:40,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2046150358, now seen corresponding path program 3 times [2024-06-28 03:30:40,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:40,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109805574] [2024-06-28 03:30:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:40,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:41,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:41,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109805574] [2024-06-28 03:30:41,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109805574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:41,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:41,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:30:41,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664719227] [2024-06-28 03:30:41,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:41,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:30:41,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:30:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:30:41,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:30:41,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 717 transitions, 12664 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:41,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:41,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:30:41,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:43,958 INFO L124 PetriNetUnfolderBase]: 4861/7349 cut-off events. [2024-06-28 03:30:43,959 INFO L125 PetriNetUnfolderBase]: For 1222722/1222741 co-relation queries the response was YES. [2024-06-28 03:30:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77431 conditions, 7349 events. 4861/7349 cut-off events. For 1222722/1222741 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 41261 event pairs, 1289 based on Foata normal form. 20/7368 useless extension candidates. Maximal degree in co-relation 77247. Up to 6553 conditions per place. [2024-06-28 03:30:44,079 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 525 selfloop transitions, 244 changer transitions 0/772 dead transitions. [2024-06-28 03:30:44,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 772 transitions, 15186 flow [2024-06-28 03:30:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:30:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:30:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-28 03:30:44,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-28 03:30:44,080 INFO L175 Difference]: Start difference. First operand has 395 places, 717 transitions, 12664 flow. Second operand 12 states and 209 transitions. [2024-06-28 03:30:44,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 772 transitions, 15186 flow [2024-06-28 03:30:49,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 772 transitions, 14991 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:30:49,505 INFO L231 Difference]: Finished difference. Result has 404 places, 740 transitions, 13349 flow [2024-06-28 03:30:49,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12469, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13349, PETRI_PLACES=404, PETRI_TRANSITIONS=740} [2024-06-28 03:30:49,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 03:30:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 740 transitions, 13349 flow [2024-06-28 03:30:49,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:49,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:49,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:30:49,507 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:49,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2046150668, now seen corresponding path program 5 times [2024-06-28 03:30:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973303042] [2024-06-28 03:30:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:50,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:50,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973303042] [2024-06-28 03:30:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973303042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:50,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:50,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:30:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366936696] [2024-06-28 03:30:50,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:50,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:30:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:50,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:30:50,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:30:50,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:30:50,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 740 transitions, 13349 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:50,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:50,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:30:50,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:53,032 INFO L124 PetriNetUnfolderBase]: 4785/7281 cut-off events. [2024-06-28 03:30:53,032 INFO L125 PetriNetUnfolderBase]: For 1261065/1261084 co-relation queries the response was YES. [2024-06-28 03:30:53,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78247 conditions, 7281 events. 4785/7281 cut-off events. For 1261065/1261084 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 41320 event pairs, 1225 based on Foata normal form. 22/7302 useless extension candidates. Maximal degree in co-relation 78059. Up to 6487 conditions per place. [2024-06-28 03:30:53,145 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 544 selfloop transitions, 184 changer transitions 0/772 dead transitions. [2024-06-28 03:30:53,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 772 transitions, 14968 flow [2024-06-28 03:30:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:30:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:30:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-28 03:30:53,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:30:53,147 INFO L175 Difference]: Start difference. First operand has 404 places, 740 transitions, 13349 flow. Second operand 11 states and 198 transitions. [2024-06-28 03:30:53,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 772 transitions, 14968 flow [2024-06-28 03:30:58,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 772 transitions, 14783 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:30:58,135 INFO L231 Difference]: Finished difference. Result has 410 places, 743 transitions, 13602 flow [2024-06-28 03:30:58,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13164, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13602, PETRI_PLACES=410, PETRI_TRANSITIONS=743} [2024-06-28 03:30:58,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-28 03:30:58,136 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 743 transitions, 13602 flow [2024-06-28 03:30:58,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:58,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:58,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:58,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:30:58,136 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:58,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2037807886, now seen corresponding path program 2 times [2024-06-28 03:30:58,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:58,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449108726] [2024-06-28 03:30:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:58,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:58,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449108726] [2024-06-28 03:30:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449108726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:58,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:58,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:58,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207296054] [2024-06-28 03:30:58,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:58,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:58,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:58,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:58,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:58,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:30:58,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 743 transitions, 13602 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:30:58,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:58,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:30:58,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:01,413 INFO L124 PetriNetUnfolderBase]: 5033/7585 cut-off events. [2024-06-28 03:31:01,413 INFO L125 PetriNetUnfolderBase]: For 1353088/1353107 co-relation queries the response was YES. [2024-06-28 03:31:01,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82307 conditions, 7585 events. 5033/7585 cut-off events. For 1353088/1353107 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42670 event pairs, 1331 based on Foata normal form. 24/7608 useless extension candidates. Maximal degree in co-relation 82117. Up to 6631 conditions per place. [2024-06-28 03:31:01,528 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 583 selfloop transitions, 215 changer transitions 0/801 dead transitions. [2024-06-28 03:31:01,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 801 transitions, 16369 flow [2024-06-28 03:31:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:31:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:31:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 03:31:01,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-28 03:31:01,529 INFO L175 Difference]: Start difference. First operand has 410 places, 743 transitions, 13602 flow. Second operand 10 states and 187 transitions. [2024-06-28 03:31:01,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 801 transitions, 16369 flow [2024-06-28 03:31:07,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 801 transitions, 15965 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 03:31:07,512 INFO L231 Difference]: Finished difference. Result has 413 places, 770 transitions, 14303 flow [2024-06-28 03:31:07,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13198, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14303, PETRI_PLACES=413, PETRI_TRANSITIONS=770} [2024-06-28 03:31:07,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-28 03:31:07,512 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 770 transitions, 14303 flow [2024-06-28 03:31:07,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:07,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:07,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:07,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:31:07,513 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:31:07,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash -393692352, now seen corresponding path program 4 times [2024-06-28 03:31:07,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:07,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438630475] [2024-06-28 03:31:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:07,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:08,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438630475] [2024-06-28 03:31:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438630475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:08,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:08,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:31:08,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367322443] [2024-06-28 03:31:08,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:08,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:31:08,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:31:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:31:08,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:31:08,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 770 transitions, 14303 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:08,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:08,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:31:08,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:10,915 INFO L124 PetriNetUnfolderBase]: 5045/7604 cut-off events. [2024-06-28 03:31:10,915 INFO L125 PetriNetUnfolderBase]: For 1366871/1366916 co-relation queries the response was YES. [2024-06-28 03:31:11,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83937 conditions, 7604 events. 5045/7604 cut-off events. For 1366871/1366916 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42773 event pairs, 1289 based on Foata normal form. 44/7647 useless extension candidates. Maximal degree in co-relation 83744. Up to 6944 conditions per place. [2024-06-28 03:31:11,062 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 607 selfloop transitions, 186 changer transitions 0/796 dead transitions. [2024-06-28 03:31:11,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 796 transitions, 16435 flow [2024-06-28 03:31:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:31:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:31:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 03:31:11,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:31:11,063 INFO L175 Difference]: Start difference. First operand has 413 places, 770 transitions, 14303 flow. Second operand 10 states and 170 transitions. [2024-06-28 03:31:11,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 796 transitions, 16435 flow [2024-06-28 03:31:17,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 796 transitions, 16229 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-28 03:31:17,095 INFO L231 Difference]: Finished difference. Result has 419 places, 774 transitions, 14558 flow [2024-06-28 03:31:17,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14097, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14558, PETRI_PLACES=419, PETRI_TRANSITIONS=774} [2024-06-28 03:31:17,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-28 03:31:17,095 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 774 transitions, 14558 flow [2024-06-28 03:31:17,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:17,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:17,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:31:17,096 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)] === [2024-06-28 03:31:17,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -920455822, now seen corresponding path program 6 times [2024-06-28 03:31:17,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:17,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207341360] [2024-06-28 03:31:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:18,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:18,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207341360] [2024-06-28 03:31:18,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207341360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:18,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:18,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:31:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037384604] [2024-06-28 03:31:18,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:18,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:31:18,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:31:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:31:18,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:31:18,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 774 transitions, 14558 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:18,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:18,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:31:18,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:20,585 INFO L124 PetriNetUnfolderBase]: 4937/7492 cut-off events. [2024-06-28 03:31:20,585 INFO L125 PetriNetUnfolderBase]: For 1388941/1388986 co-relation queries the response was YES. [2024-06-28 03:31:20,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83530 conditions, 7492 events. 4937/7492 cut-off events. For 1388941/1388986 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42555 event pairs, 1235 based on Foata normal form. 46/7537 useless extension candidates. Maximal degree in co-relation 83335. Up to 6797 conditions per place. [2024-06-28 03:31:20,713 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 612 selfloop transitions, 139 changer transitions 0/796 dead transitions. [2024-06-28 03:31:20,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 796 transitions, 16154 flow [2024-06-28 03:31:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:31:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:31:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 03:31:20,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:31:20,714 INFO L175 Difference]: Start difference. First operand has 419 places, 774 transitions, 14558 flow. Second operand 10 states and 174 transitions. [2024-06-28 03:31:20,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 796 transitions, 16154 flow [2024-06-28 03:31:25,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 796 transitions, 15765 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 03:31:25,778 INFO L231 Difference]: Finished difference. Result has 423 places, 775 transitions, 14467 flow [2024-06-28 03:31:25,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14169, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14467, PETRI_PLACES=423, PETRI_TRANSITIONS=775} [2024-06-28 03:31:25,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-28 03:31:25,779 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 775 transitions, 14467 flow [2024-06-28 03:31:25,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:25,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:25,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:31:25,779 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)] === [2024-06-28 03:31:25,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash -920455512, now seen corresponding path program 5 times [2024-06-28 03:31:25,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:25,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661200346] [2024-06-28 03:31:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:25,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:26,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:26,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661200346] [2024-06-28 03:31:26,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661200346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:26,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:26,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:31:26,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722328028] [2024-06-28 03:31:26,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:26,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:31:26,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:26,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:31:26,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:31:27,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:31:27,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 775 transitions, 14467 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:27,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:27,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:31:27,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:29,316 INFO L124 PetriNetUnfolderBase]: 5029/7582 cut-off events. [2024-06-28 03:31:29,317 INFO L125 PetriNetUnfolderBase]: For 1391204/1391249 co-relation queries the response was YES. [2024-06-28 03:31:29,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83759 conditions, 7582 events. 5029/7582 cut-off events. For 1391204/1391249 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42621 event pairs, 1275 based on Foata normal form. 44/7625 useless extension candidates. Maximal degree in co-relation 83563. Up to 6902 conditions per place. [2024-06-28 03:31:29,452 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 603 selfloop transitions, 192 changer transitions 0/798 dead transitions. [2024-06-28 03:31:29,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 798 transitions, 16539 flow [2024-06-28 03:31:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:31:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:31:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-28 03:31:29,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-28 03:31:29,453 INFO L175 Difference]: Start difference. First operand has 423 places, 775 transitions, 14467 flow. Second operand 11 states and 185 transitions. [2024-06-28 03:31:29,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 798 transitions, 16539 flow [2024-06-28 03:31:35,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 798 transitions, 16299 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 03:31:35,067 INFO L231 Difference]: Finished difference. Result has 428 places, 775 transitions, 14619 flow [2024-06-28 03:31:35,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14227, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14619, PETRI_PLACES=428, PETRI_TRANSITIONS=775} [2024-06-28 03:31:35,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-28 03:31:35,067 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 775 transitions, 14619 flow [2024-06-28 03:31:35,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:35,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:35,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:35,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:31:35,068 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:31:35,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash 824265056, now seen corresponding path program 3 times [2024-06-28 03:31:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:35,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416660705] [2024-06-28 03:31:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:35,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416660705] [2024-06-28 03:31:35,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416660705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:35,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:35,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034002811] [2024-06-28 03:31:35,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:35,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:35,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:35,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:35,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:31:35,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 775 transitions, 14619 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:35,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:35,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:31:35,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:38,304 INFO L124 PetriNetUnfolderBase]: 5113/7699 cut-off events. [2024-06-28 03:31:38,304 INFO L125 PetriNetUnfolderBase]: For 1468666/1468711 co-relation queries the response was YES. [2024-06-28 03:31:38,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85776 conditions, 7699 events. 5113/7699 cut-off events. For 1468666/1468711 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43293 event pairs, 1275 based on Foata normal form. 48/7746 useless extension candidates. Maximal degree in co-relation 85579. Up to 6688 conditions per place. [2024-06-28 03:31:38,444 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 598 selfloop transitions, 216 changer transitions 0/817 dead transitions. [2024-06-28 03:31:38,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 817 transitions, 17255 flow [2024-06-28 03:31:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:31:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:31:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 03:31:38,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-28 03:31:38,445 INFO L175 Difference]: Start difference. First operand has 428 places, 775 transitions, 14619 flow. Second operand 10 states and 181 transitions. [2024-06-28 03:31:38,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 817 transitions, 17255 flow [2024-06-28 03:31:44,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 817 transitions, 16829 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 03:31:44,729 INFO L231 Difference]: Finished difference. Result has 429 places, 789 transitions, 14937 flow [2024-06-28 03:31:44,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14193, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14937, PETRI_PLACES=429, PETRI_TRANSITIONS=789} [2024-06-28 03:31:44,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-28 03:31:44,729 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 789 transitions, 14937 flow [2024-06-28 03:31:44,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:44,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:44,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:31:44,730 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)] === [2024-06-28 03:31:44,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:44,730 INFO L85 PathProgramCache]: Analyzing trace with hash 824277146, now seen corresponding path program 4 times [2024-06-28 03:31:44,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:44,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607967958] [2024-06-28 03:31:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:44,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:45,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607967958] [2024-06-28 03:31:45,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607967958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:45,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:45,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:45,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547793754] [2024-06-28 03:31:45,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:45,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:45,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:31:45,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 789 transitions, 14937 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:45,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:45,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:31:45,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:47,908 INFO L124 PetriNetUnfolderBase]: 5101/7684 cut-off events. [2024-06-28 03:31:47,908 INFO L125 PetriNetUnfolderBase]: For 1466001/1466046 co-relation queries the response was YES. [2024-06-28 03:31:48,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85501 conditions, 7684 events. 5101/7684 cut-off events. For 1466001/1466046 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43241 event pairs, 1273 based on Foata normal form. 48/7731 useless extension candidates. Maximal degree in co-relation 85303. Up to 6684 conditions per place. [2024-06-28 03:31:48,041 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 595 selfloop transitions, 217 changer transitions 0/815 dead transitions. [2024-06-28 03:31:48,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 815 transitions, 17267 flow [2024-06-28 03:31:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:31:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:31:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 03:31:48,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-28 03:31:48,042 INFO L175 Difference]: Start difference. First operand has 429 places, 789 transitions, 14937 flow. Second operand 10 states and 178 transitions. [2024-06-28 03:31:48,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 815 transitions, 17267 flow [2024-06-28 03:31:53,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 815 transitions, 16666 flow, removed 133 selfloop flow, removed 6 redundant places. [2024-06-28 03:31:53,458 INFO L231 Difference]: Finished difference. Result has 433 places, 789 transitions, 14783 flow [2024-06-28 03:31:53,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14336, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14783, PETRI_PLACES=433, PETRI_TRANSITIONS=789} [2024-06-28 03:31:53,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-28 03:31:53,459 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 789 transitions, 14783 flow [2024-06-28 03:31:53,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:53,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:31:53,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:31:53,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 03:31:53,459 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)] === [2024-06-28 03:31:53,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:31:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash 823919096, now seen corresponding path program 5 times [2024-06-28 03:31:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:31:53,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999529197] [2024-06-28 03:31:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:31:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:31:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:31:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:31:54,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:31:54,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999529197] [2024-06-28 03:31:54,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999529197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:31:54,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:31:54,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:31:54,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7656447] [2024-06-28 03:31:54,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:31:54,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:31:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:31:54,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:31:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:31:54,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:31:54,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 789 transitions, 14783 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:31:54,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:31:54,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:31:54,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:31:56,780 INFO L124 PetriNetUnfolderBase]: 5083/7660 cut-off events. [2024-06-28 03:31:56,781 INFO L125 PetriNetUnfolderBase]: For 1458674/1458719 co-relation queries the response was YES. [2024-06-28 03:31:56,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84411 conditions, 7660 events. 5083/7660 cut-off events. For 1458674/1458719 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43099 event pairs, 1285 based on Foata normal form. 48/7707 useless extension candidates. Maximal degree in co-relation 84212. Up to 6673 conditions per place. [2024-06-28 03:31:56,930 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 597 selfloop transitions, 216 changer transitions 0/816 dead transitions. [2024-06-28 03:31:56,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 816 transitions, 16925 flow [2024-06-28 03:31:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:31:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:31:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 03:31:56,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-28 03:31:56,931 INFO L175 Difference]: Start difference. First operand has 433 places, 789 transitions, 14783 flow. Second operand 10 states and 181 transitions. [2024-06-28 03:31:56,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 816 transitions, 16925 flow [2024-06-28 03:32:01,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 816 transitions, 16458 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-28 03:32:01,977 INFO L231 Difference]: Finished difference. Result has 435 places, 789 transitions, 14758 flow [2024-06-28 03:32:01,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14316, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14758, PETRI_PLACES=435, PETRI_TRANSITIONS=789} [2024-06-28 03:32:01,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-28 03:32:01,978 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 789 transitions, 14758 flow [2024-06-28 03:32:01,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:01,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:01,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:01,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 03:32:01,979 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)] === [2024-06-28 03:32:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2045627078, now seen corresponding path program 4 times [2024-06-28 03:32:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553813642] [2024-06-28 03:32:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:01,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:02,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553813642] [2024-06-28 03:32:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553813642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:02,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:02,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:32:02,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378222168] [2024-06-28 03:32:02,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:02,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:32:02,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:02,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:32:02,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:32:02,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:02,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 789 transitions, 14758 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:02,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:02,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:02,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:05,139 INFO L124 PetriNetUnfolderBase]: 5023/7615 cut-off events. [2024-06-28 03:32:05,139 INFO L125 PetriNetUnfolderBase]: For 1503652/1503697 co-relation queries the response was YES. [2024-06-28 03:32:05,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84584 conditions, 7615 events. 5023/7615 cut-off events. For 1503652/1503697 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 43359 event pairs, 1170 based on Foata normal form. 48/7662 useless extension candidates. Maximal degree in co-relation 84384. Up to 6709 conditions per place. [2024-06-28 03:32:05,281 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 655 selfloop transitions, 127 changer transitions 0/827 dead transitions. [2024-06-28 03:32:05,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 827 transitions, 16721 flow [2024-06-28 03:32:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:32:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:32:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:32:05,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:32:05,282 INFO L175 Difference]: Start difference. First operand has 435 places, 789 transitions, 14758 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:32:05,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 827 transitions, 16721 flow [2024-06-28 03:32:10,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 827 transitions, 16289 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 03:32:10,035 INFO L231 Difference]: Finished difference. Result has 435 places, 798 transitions, 14810 flow [2024-06-28 03:32:10,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14328, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14810, PETRI_PLACES=435, PETRI_TRANSITIONS=798} [2024-06-28 03:32:10,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-28 03:32:10,036 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 798 transitions, 14810 flow [2024-06-28 03:32:10,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:10,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:10,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:10,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 03:32:10,037 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)] === [2024-06-28 03:32:10,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2045747234, now seen corresponding path program 4 times [2024-06-28 03:32:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727054004] [2024-06-28 03:32:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:10,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727054004] [2024-06-28 03:32:10,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727054004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:10,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:10,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:32:10,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64210134] [2024-06-28 03:32:10,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:10,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:32:10,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:10,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:32:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:32:10,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:32:10,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 798 transitions, 14810 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) [2024-06-28 03:32:10,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:10,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:32:10,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:13,151 INFO L124 PetriNetUnfolderBase]: 5159/7768 cut-off events. [2024-06-28 03:32:13,151 INFO L125 PetriNetUnfolderBase]: For 1519390/1519435 co-relation queries the response was YES. [2024-06-28 03:32:13,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86310 conditions, 7768 events. 5159/7768 cut-off events. For 1519390/1519435 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 43782 event pairs, 1323 based on Foata normal form. 46/7813 useless extension candidates. Maximal degree in co-relation 86109. Up to 7092 conditions per place. [2024-06-28 03:32:13,282 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 608 selfloop transitions, 223 changer transitions 0/834 dead transitions. [2024-06-28 03:32:13,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 834 transitions, 17345 flow [2024-06-28 03:32:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:32:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:32:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:32:13,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 03:32:13,284 INFO L175 Difference]: Start difference. First operand has 435 places, 798 transitions, 14810 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:32:13,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 834 transitions, 17345 flow [2024-06-28 03:32:18,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 834 transitions, 16966 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-28 03:32:18,842 INFO L231 Difference]: Finished difference. Result has 438 places, 814 transitions, 15340 flow [2024-06-28 03:32:18,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14431, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15340, PETRI_PLACES=438, PETRI_TRANSITIONS=814} [2024-06-28 03:32:18,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-28 03:32:18,843 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 814 transitions, 15340 flow [2024-06-28 03:32:18,843 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) [2024-06-28 03:32:18,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:18,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:18,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 03:32:18,844 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)] === [2024-06-28 03:32:18,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2039358286, now seen corresponding path program 5 times [2024-06-28 03:32:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:18,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869132336] [2024-06-28 03:32:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:18,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869132336] [2024-06-28 03:32:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869132336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:19,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:32:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004685601] [2024-06-28 03:32:19,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:32:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:32:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:32:19,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:19,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 814 transitions, 15340 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:19,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:19,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:19,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:22,119 INFO L124 PetriNetUnfolderBase]: 5145/7785 cut-off events. [2024-06-28 03:32:22,120 INFO L125 PetriNetUnfolderBase]: For 1609892/1609937 co-relation queries the response was YES. [2024-06-28 03:32:22,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88003 conditions, 7785 events. 5145/7785 cut-off events. For 1609892/1609937 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 44379 event pairs, 1202 based on Foata normal form. 48/7832 useless extension candidates. Maximal degree in co-relation 87800. Up to 6448 conditions per place. [2024-06-28 03:32:22,261 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 607 selfloop transitions, 208 changer transitions 0/865 dead transitions. [2024-06-28 03:32:22,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 865 transitions, 18083 flow [2024-06-28 03:32:22,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:32:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:32:22,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:32:22,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:32:22,262 INFO L175 Difference]: Start difference. First operand has 438 places, 814 transitions, 15340 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:32:22,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 865 transitions, 18083 flow [2024-06-28 03:32:27,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 865 transitions, 17822 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 03:32:27,558 INFO L231 Difference]: Finished difference. Result has 442 places, 832 transitions, 16034 flow [2024-06-28 03:32:27,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15083, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16034, PETRI_PLACES=442, PETRI_TRANSITIONS=832} [2024-06-28 03:32:27,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-28 03:32:27,559 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 832 transitions, 16034 flow [2024-06-28 03:32:27,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:27,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:27,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:27,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 03:32:27,560 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:32:27,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash 566363924, now seen corresponding path program 6 times [2024-06-28 03:32:27,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:27,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569106475] [2024-06-28 03:32:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:27,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:28,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:28,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569106475] [2024-06-28 03:32:28,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569106475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:28,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:28,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:32:28,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002777891] [2024-06-28 03:32:28,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:28,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:32:28,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:32:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:32:28,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:28,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 832 transitions, 16034 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:28,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:28,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:28,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:30,807 INFO L124 PetriNetUnfolderBase]: 5199/7859 cut-off events. [2024-06-28 03:32:30,807 INFO L125 PetriNetUnfolderBase]: For 1619488/1619533 co-relation queries the response was YES. [2024-06-28 03:32:30,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90444 conditions, 7859 events. 5199/7859 cut-off events. For 1619488/1619533 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44760 event pairs, 1233 based on Foata normal form. 44/7902 useless extension candidates. Maximal degree in co-relation 90240. Up to 6488 conditions per place. [2024-06-28 03:32:30,944 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 601 selfloop transitions, 217 changer transitions 0/868 dead transitions. [2024-06-28 03:32:30,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 868 transitions, 18585 flow [2024-06-28 03:32:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:32:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:32:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:32:30,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 03:32:30,945 INFO L175 Difference]: Start difference. First operand has 442 places, 832 transitions, 16034 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:32:30,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 868 transitions, 18585 flow [2024-06-28 03:32:36,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 868 transitions, 18291 flow, removed 112 selfloop flow, removed 4 redundant places. [2024-06-28 03:32:36,366 INFO L231 Difference]: Finished difference. Result has 446 places, 843 transitions, 16485 flow [2024-06-28 03:32:36,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15766, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16485, PETRI_PLACES=446, PETRI_TRANSITIONS=843} [2024-06-28 03:32:36,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-28 03:32:36,367 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 843 transitions, 16485 flow [2024-06-28 03:32:36,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:36,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:36,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:36,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 03:32:36,367 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)] === [2024-06-28 03:32:36,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash -313505532, now seen corresponding path program 5 times [2024-06-28 03:32:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:36,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569868689] [2024-06-28 03:32:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:36,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:37,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:37,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569868689] [2024-06-28 03:32:37,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569868689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:37,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:37,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:32:37,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148041457] [2024-06-28 03:32:37,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:37,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:32:37,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:37,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:32:37,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:32:37,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:32:37,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 843 transitions, 16485 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) [2024-06-28 03:32:37,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:37,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:32:37,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:39,544 INFO L124 PetriNetUnfolderBase]: 5309/7974 cut-off events. [2024-06-28 03:32:39,544 INFO L125 PetriNetUnfolderBase]: For 1629253/1629298 co-relation queries the response was YES. [2024-06-28 03:32:39,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91329 conditions, 7974 events. 5309/7974 cut-off events. For 1629253/1629298 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 44953 event pairs, 1307 based on Foata normal form. 44/8017 useless extension candidates. Maximal degree in co-relation 91123. Up to 7296 conditions per place. [2024-06-28 03:32:39,686 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 658 selfloop transitions, 204 changer transitions 0/865 dead transitions. [2024-06-28 03:32:39,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 865 transitions, 19004 flow [2024-06-28 03:32:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:32:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:32:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:32:39,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:32:39,687 INFO L175 Difference]: Start difference. First operand has 446 places, 843 transitions, 16485 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:32:39,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 865 transitions, 19004 flow [2024-06-28 03:32:46,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 865 transitions, 18620 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-28 03:32:46,057 INFO L231 Difference]: Finished difference. Result has 448 places, 847 transitions, 16615 flow [2024-06-28 03:32:46,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16107, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16615, PETRI_PLACES=448, PETRI_TRANSITIONS=847} [2024-06-28 03:32:46,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-28 03:32:46,058 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 847 transitions, 16615 flow [2024-06-28 03:32:46,058 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) [2024-06-28 03:32:46,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:46,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 03:32:46,058 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)] === [2024-06-28 03:32:46,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1463042940, now seen corresponding path program 6 times [2024-06-28 03:32:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:46,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323351131] [2024-06-28 03:32:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:46,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:46,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323351131] [2024-06-28 03:32:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323351131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:46,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:46,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:32:46,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953246368] [2024-06-28 03:32:46,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:46,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:32:46,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:32:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:32:46,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:32:46,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 847 transitions, 16615 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) [2024-06-28 03:32:46,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:46,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:32:46,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:49,193 INFO L124 PetriNetUnfolderBase]: 5303/7966 cut-off events. [2024-06-28 03:32:49,193 INFO L125 PetriNetUnfolderBase]: For 1619264/1619309 co-relation queries the response was YES. [2024-06-28 03:32:49,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90704 conditions, 7966 events. 5303/7966 cut-off events. For 1619264/1619309 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 44904 event pairs, 1307 based on Foata normal form. 44/8009 useless extension candidates. Maximal degree in co-relation 90498. Up to 7291 conditions per place. [2024-06-28 03:32:49,337 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 654 selfloop transitions, 207 changer transitions 0/864 dead transitions. [2024-06-28 03:32:49,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 864 transitions, 18831 flow [2024-06-28 03:32:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:32:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:32:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:32:49,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 03:32:49,338 INFO L175 Difference]: Start difference. First operand has 448 places, 847 transitions, 16615 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:32:49,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 864 transitions, 18831 flow [2024-06-28 03:32:55,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 864 transitions, 18537 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 03:32:55,463 INFO L231 Difference]: Finished difference. Result has 451 places, 847 transitions, 16759 flow [2024-06-28 03:32:55,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16325, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16759, PETRI_PLACES=451, PETRI_TRANSITIONS=847} [2024-06-28 03:32:55,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-28 03:32:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 847 transitions, 16759 flow [2024-06-28 03:32:55,463 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) [2024-06-28 03:32:55,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:32:55,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:32:55,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 03:32:55,464 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)] === [2024-06-28 03:32:55,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:32:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -609087060, now seen corresponding path program 7 times [2024-06-28 03:32:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:32:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307793256] [2024-06-28 03:32:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:32:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:32:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:32:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:32:56,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:32:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307793256] [2024-06-28 03:32:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307793256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:32:56,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:32:56,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:32:56,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878289965] [2024-06-28 03:32:56,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:32:56,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:32:56,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:32:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:32:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:32:56,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:32:56,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 847 transitions, 16759 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:32:56,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:32:56,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:32:56,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:32:59,016 INFO L124 PetriNetUnfolderBase]: 5222/7890 cut-off events. [2024-06-28 03:32:59,016 INFO L125 PetriNetUnfolderBase]: For 1658708/1658752 co-relation queries the response was YES. [2024-06-28 03:32:59,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90830 conditions, 7890 events. 5222/7890 cut-off events. For 1658708/1658752 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 44929 event pairs, 1097 based on Foata normal form. 42/7924 useless extension candidates. Maximal degree in co-relation 90624. Up to 6615 conditions per place. [2024-06-28 03:32:59,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 286 changer transitions 0/883 dead transitions. [2024-06-28 03:32:59,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 883 transitions, 18852 flow [2024-06-28 03:32:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:32:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:32:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:32:59,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 03:32:59,168 INFO L175 Difference]: Start difference. First operand has 451 places, 847 transitions, 16759 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:32:59,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 883 transitions, 18852 flow [2024-06-28 03:33:05,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 883 transitions, 18480 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:33:05,649 INFO L231 Difference]: Finished difference. Result has 454 places, 851 transitions, 17114 flow [2024-06-28 03:33:05,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16389, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17114, PETRI_PLACES=454, PETRI_TRANSITIONS=851} [2024-06-28 03:33:05,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-28 03:33:05,650 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 851 transitions, 17114 flow [2024-06-28 03:33:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:05,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:33:05,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:33:05,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 03:33:05,650 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)] === [2024-06-28 03:33:05,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:33:05,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1790737795, now seen corresponding path program 1 times [2024-06-28 03:33:05,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:33:05,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156039116] [2024-06-28 03:33:05,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:33:05,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:33:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:33:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:33:06,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:33:06,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156039116] [2024-06-28 03:33:06,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156039116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:33:06,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:33:06,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:33:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695706599] [2024-06-28 03:33:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:33:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:33:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:33:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:33:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:33:06,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:33:06,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 851 transitions, 17114 flow. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:06,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:33:06,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:33:06,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:33:09,530 INFO L124 PetriNetUnfolderBase]: 5381/8077 cut-off events. [2024-06-28 03:33:09,530 INFO L125 PetriNetUnfolderBase]: For 1670724/1670743 co-relation queries the response was YES. [2024-06-28 03:33:09,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93005 conditions, 8077 events. 5381/8077 cut-off events. For 1670724/1670743 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 45635 event pairs, 1407 based on Foata normal form. 24/8100 useless extension candidates. Maximal degree in co-relation 92798. Up to 6975 conditions per place. [2024-06-28 03:33:09,693 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 583 selfloop transitions, 327 changer transitions 0/913 dead transitions. [2024-06-28 03:33:09,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 913 transitions, 19889 flow [2024-06-28 03:33:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 03:33:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 03:33:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 242 transitions. [2024-06-28 03:33:09,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 03:33:09,694 INFO L175 Difference]: Start difference. First operand has 454 places, 851 transitions, 17114 flow. Second operand 14 states and 242 transitions. [2024-06-28 03:33:09,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 913 transitions, 19889 flow [2024-06-28 03:33:15,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 913 transitions, 19334 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-28 03:33:15,933 INFO L231 Difference]: Finished difference. Result has 463 places, 874 transitions, 17963 flow [2024-06-28 03:33:15,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16571, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17963, PETRI_PLACES=463, PETRI_TRANSITIONS=874} [2024-06-28 03:33:15,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-28 03:33:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 874 transitions, 17963 flow [2024-06-28 03:33:15,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:15,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:33:15,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:33:15,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 03:33:15,934 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:33:15,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:33:15,935 INFO L85 PathProgramCache]: Analyzing trace with hash 271021902, now seen corresponding path program 6 times [2024-06-28 03:33:15,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:33:15,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026703761] [2024-06-28 03:33:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:33:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:33:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:33:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:33:16,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:33:16,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026703761] [2024-06-28 03:33:16,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026703761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:33:16,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:33:16,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:33:16,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652831725] [2024-06-28 03:33:16,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:33:16,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:33:16,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:33:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:33:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:33:17,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:33:17,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 874 transitions, 17963 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:17,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:33:17,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:33:17,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:33:19,426 INFO L124 PetriNetUnfolderBase]: 5421/8137 cut-off events. [2024-06-28 03:33:19,426 INFO L125 PetriNetUnfolderBase]: For 1601900/1601919 co-relation queries the response was YES. [2024-06-28 03:33:19,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95069 conditions, 8137 events. 5421/8137 cut-off events. For 1601900/1601919 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 46056 event pairs, 1376 based on Foata normal form. 20/8156 useless extension candidates. Maximal degree in co-relation 94859. Up to 7136 conditions per place. [2024-06-28 03:33:19,583 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 553 selfloop transitions, 362 changer transitions 0/918 dead transitions. [2024-06-28 03:33:19,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 918 transitions, 20541 flow [2024-06-28 03:33:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:33:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:33:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:33:19,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:33:19,585 INFO L175 Difference]: Start difference. First operand has 463 places, 874 transitions, 17963 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:33:19,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 918 transitions, 20541 flow [2024-06-28 03:33:25,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 918 transitions, 20311 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 03:33:25,916 INFO L231 Difference]: Finished difference. Result has 465 places, 890 transitions, 18697 flow [2024-06-28 03:33:25,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17741, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18697, PETRI_PLACES=465, PETRI_TRANSITIONS=890} [2024-06-28 03:33:25,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-28 03:33:25,917 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 890 transitions, 18697 flow [2024-06-28 03:33:25,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:25,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:33:25,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:33:25,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 03:33:25,917 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:33:25,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:33:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1167463272, now seen corresponding path program 8 times [2024-06-28 03:33:25,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:33:25,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390352894] [2024-06-28 03:33:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:33:25,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:33:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:33:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:33:27,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:33:27,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390352894] [2024-06-28 03:33:27,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390352894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:33:27,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:33:27,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:33:27,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362932361] [2024-06-28 03:33:27,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:33:27,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:33:27,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:33:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:33:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:33:27,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:33:27,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 890 transitions, 18697 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:27,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:33:27,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:33:27,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:33:29,554 INFO L124 PetriNetUnfolderBase]: 5382/8130 cut-off events. [2024-06-28 03:33:29,554 INFO L125 PetriNetUnfolderBase]: For 1655636/1655656 co-relation queries the response was YES. [2024-06-28 03:33:29,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96432 conditions, 8130 events. 5382/8130 cut-off events. For 1655636/1655656 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 46579 event pairs, 1296 based on Foata normal form. 22/8148 useless extension candidates. Maximal degree in co-relation 96219. Up to 7183 conditions per place. [2024-06-28 03:33:29,717 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 623 selfloop transitions, 251 changer transitions 0/929 dead transitions. [2024-06-28 03:33:29,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 929 transitions, 20759 flow [2024-06-28 03:33:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:33:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:33:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:33:29,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:33:29,718 INFO L175 Difference]: Start difference. First operand has 465 places, 890 transitions, 18697 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:33:29,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 929 transitions, 20759 flow [2024-06-28 03:33:37,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 929 transitions, 20124 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 03:33:37,327 INFO L231 Difference]: Finished difference. Result has 467 places, 902 transitions, 18797 flow [2024-06-28 03:33:37,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18062, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18797, PETRI_PLACES=467, PETRI_TRANSITIONS=902} [2024-06-28 03:33:37,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-28 03:33:37,329 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 902 transitions, 18797 flow [2024-06-28 03:33:37,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:37,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:33:37,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:33:37,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 03:33:37,329 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:33:37,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:33:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1242010825, now seen corresponding path program 2 times [2024-06-28 03:33:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:33:37,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326337990] [2024-06-28 03:33:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:33:37,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:33:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:33:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:33:38,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:33:38,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326337990] [2024-06-28 03:33:38,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326337990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:33:38,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:33:38,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 03:33:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428456573] [2024-06-28 03:33:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:33:38,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 03:33:38,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:33:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 03:33:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-28 03:33:38,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:33:38,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 902 transitions, 18797 flow. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:38,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:33:38,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:33:38,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:33:41,679 INFO L124 PetriNetUnfolderBase]: 5583/8366 cut-off events. [2024-06-28 03:33:41,679 INFO L125 PetriNetUnfolderBase]: For 1665596/1665615 co-relation queries the response was YES. [2024-06-28 03:33:41,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98375 conditions, 8366 events. 5583/8366 cut-off events. For 1665596/1665615 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 47439 event pairs, 1336 based on Foata normal form. 20/8385 useless extension candidates. Maximal degree in co-relation 98162. Up to 7018 conditions per place. [2024-06-28 03:33:41,833 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 632 selfloop transitions, 322 changer transitions 0/957 dead transitions. [2024-06-28 03:33:41,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 957 transitions, 21777 flow [2024-06-28 03:33:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:33:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:33:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-28 03:33:41,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 03:33:41,834 INFO L175 Difference]: Start difference. First operand has 467 places, 902 transitions, 18797 flow. Second operand 11 states and 209 transitions. [2024-06-28 03:33:41,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 957 transitions, 21777 flow [2024-06-28 03:33:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 957 transitions, 21274 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:33:49,228 INFO L231 Difference]: Finished difference. Result has 472 places, 920 transitions, 19281 flow [2024-06-28 03:33:49,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18294, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19281, PETRI_PLACES=472, PETRI_TRANSITIONS=920} [2024-06-28 03:33:49,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-28 03:33:49,230 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 920 transitions, 19281 flow [2024-06-28 03:33:49,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 12 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:49,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:33:49,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:33:49,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 03:33:49,230 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:33:49,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:33:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash -600515870, now seen corresponding path program 7 times [2024-06-28 03:33:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:33:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471197790] [2024-06-28 03:33:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:33:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:33:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:33:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:33:50,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:33:50,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471197790] [2024-06-28 03:33:50,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471197790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:33:50,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:33:50,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:33:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325848633] [2024-06-28 03:33:50,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:33:50,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:33:50,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:33:50,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:33:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:33:50,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:33:50,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 920 transitions, 19281 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:33:50,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:33:50,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:33:50,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:33:54,154 INFO L124 PetriNetUnfolderBase]: 5593/8379 cut-off events. [2024-06-28 03:33:54,154 INFO L125 PetriNetUnfolderBase]: For 1705390/1705409 co-relation queries the response was YES. [2024-06-28 03:33:54,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100031 conditions, 8379 events. 5593/8379 cut-off events. For 1705390/1705409 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 47444 event pairs, 1402 based on Foata normal form. 20/8398 useless extension candidates. Maximal degree in co-relation 99816. Up to 7624 conditions per place. [2024-06-28 03:33:54,302 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 662 selfloop transitions, 282 changer transitions 0/947 dead transitions. [2024-06-28 03:33:54,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 947 transitions, 21555 flow [2024-06-28 03:33:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:33:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:33:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 03:33:54,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:33:54,303 INFO L175 Difference]: Start difference. First operand has 472 places, 920 transitions, 19281 flow. Second operand 10 states and 170 transitions. [2024-06-28 03:33:54,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 947 transitions, 21555 flow [2024-06-28 03:34:00,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 947 transitions, 21174 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-28 03:34:00,751 INFO L231 Difference]: Finished difference. Result has 477 places, 924 transitions, 19574 flow [2024-06-28 03:34:00,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=18900, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19574, PETRI_PLACES=477, PETRI_TRANSITIONS=924} [2024-06-28 03:34:00,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-28 03:34:00,751 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 924 transitions, 19574 flow [2024-06-28 03:34:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:00,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:00,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 03:34:00,752 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:34:00,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1175806054, now seen corresponding path program 6 times [2024-06-28 03:34:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:00,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483356992] [2024-06-28 03:34:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:00,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:01,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:01,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483356992] [2024-06-28 03:34:01,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483356992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:01,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:01,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:34:01,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970984656] [2024-06-28 03:34:01,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:34:01,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:01,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:34:01,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:34:01,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:34:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 924 transitions, 19574 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:34:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:05,201 INFO L124 PetriNetUnfolderBase]: 5663/8476 cut-off events. [2024-06-28 03:34:05,201 INFO L125 PetriNetUnfolderBase]: For 1788776/1788795 co-relation queries the response was YES. [2024-06-28 03:34:05,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102496 conditions, 8476 events. 5663/8476 cut-off events. For 1788776/1788795 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 48072 event pairs, 1412 based on Foata normal form. 24/8499 useless extension candidates. Maximal degree in co-relation 102279. Up to 7322 conditions per place. [2024-06-28 03:34:05,375 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 658 selfloop transitions, 306 changer transitions 0/967 dead transitions. [2024-06-28 03:34:05,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 967 transitions, 22510 flow [2024-06-28 03:34:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:34:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:34:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:34:05,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 03:34:05,376 INFO L175 Difference]: Start difference. First operand has 477 places, 924 transitions, 19574 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:34:05,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 967 transitions, 22510 flow [2024-06-28 03:34:11,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 967 transitions, 21938 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-28 03:34:11,734 INFO L231 Difference]: Finished difference. Result has 479 places, 939 transitions, 20268 flow [2024-06-28 03:34:11,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=19002, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20268, PETRI_PLACES=479, PETRI_TRANSITIONS=939} [2024-06-28 03:34:11,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-28 03:34:11,735 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 939 transitions, 20268 flow [2024-06-28 03:34:11,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:11,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:11,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:11,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 03:34:11,735 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:34:11,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash -600516180, now seen corresponding path program 9 times [2024-06-28 03:34:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:11,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316546013] [2024-06-28 03:34:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:11,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:12,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:12,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316546013] [2024-06-28 03:34:12,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316546013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:12,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:12,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:34:12,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417711417] [2024-06-28 03:34:12,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:12,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:34:12,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:34:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:34:13,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:34:13,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 939 transitions, 20268 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:13,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:13,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:34:13,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:16,507 INFO L124 PetriNetUnfolderBase]: 5567/8388 cut-off events. [2024-06-28 03:34:16,508 INFO L125 PetriNetUnfolderBase]: For 1819981/1820000 co-relation queries the response was YES. [2024-06-28 03:34:16,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103684 conditions, 8388 events. 5567/8388 cut-off events. For 1819981/1820000 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 48076 event pairs, 1341 based on Foata normal form. 22/8409 useless extension candidates. Maximal degree in co-relation 103465. Up to 7593 conditions per place. [2024-06-28 03:34:16,835 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 717 selfloop transitions, 191 changer transitions 0/964 dead transitions. [2024-06-28 03:34:16,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 964 transitions, 22241 flow [2024-06-28 03:34:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:34:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:34:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:34:16,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 03:34:16,836 INFO L175 Difference]: Start difference. First operand has 479 places, 939 transitions, 20268 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:34:16,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 964 transitions, 22241 flow [2024-06-28 03:34:25,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 964 transitions, 22002 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-28 03:34:25,200 INFO L231 Difference]: Finished difference. Result has 484 places, 942 transitions, 20496 flow [2024-06-28 03:34:25,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20029, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=939, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20496, PETRI_PLACES=484, PETRI_TRANSITIONS=942} [2024-06-28 03:34:25,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-28 03:34:25,201 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 942 transitions, 20496 flow [2024-06-28 03:34:25,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:25,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:25,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 03:34:25,202 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:34:25,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1463038972, now seen corresponding path program 8 times [2024-06-28 03:34:25,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770794086] [2024-06-28 03:34:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:25,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:26,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:26,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770794086] [2024-06-28 03:34:26,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770794086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:26,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:26,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:34:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505110055] [2024-06-28 03:34:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:26,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:34:26,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:34:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:34:26,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:34:26,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 942 transitions, 20496 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:26,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:26,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:34:26,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:29,589 INFO L124 PetriNetUnfolderBase]: 5691/8516 cut-off events. [2024-06-28 03:34:29,590 INFO L125 PetriNetUnfolderBase]: For 1773272/1773317 co-relation queries the response was YES. [2024-06-28 03:34:29,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104413 conditions, 8516 events. 5691/8516 cut-off events. For 1773272/1773317 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48262 event pairs, 1308 based on Foata normal form. 44/8559 useless extension candidates. Maximal degree in co-relation 104193. Up to 7827 conditions per place. [2024-06-28 03:34:29,774 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 745 selfloop transitions, 216 changer transitions 0/964 dead transitions. [2024-06-28 03:34:29,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 964 transitions, 23000 flow [2024-06-28 03:34:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:34:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:34:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:34:29,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-28 03:34:29,776 INFO L175 Difference]: Start difference. First operand has 484 places, 942 transitions, 20496 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:34:29,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 964 transitions, 23000 flow [2024-06-28 03:34:36,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 964 transitions, 22592 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 03:34:36,826 INFO L231 Difference]: Finished difference. Result has 486 places, 946 transitions, 20622 flow [2024-06-28 03:34:36,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20088, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20622, PETRI_PLACES=486, PETRI_TRANSITIONS=946} [2024-06-28 03:34:36,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-28 03:34:36,828 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 946 transitions, 20622 flow [2024-06-28 03:34:36,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:36,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:36,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:36,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 03:34:36,828 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:34:36,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -313271978, now seen corresponding path program 7 times [2024-06-28 03:34:36,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785663981] [2024-06-28 03:34:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:37,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:37,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785663981] [2024-06-28 03:34:37,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785663981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:37,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:37,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:34:37,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659864774] [2024-06-28 03:34:37,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:37,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:34:37,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:37,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:34:37,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:34:37,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:34:37,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 946 transitions, 20622 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:37,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:37,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:34:37,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:41,237 INFO L124 PetriNetUnfolderBase]: 5871/8765 cut-off events. [2024-06-28 03:34:41,238 INFO L125 PetriNetUnfolderBase]: For 1938314/1938359 co-relation queries the response was YES. [2024-06-28 03:34:41,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109511 conditions, 8765 events. 5871/8765 cut-off events. For 1938314/1938359 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 49681 event pairs, 1324 based on Foata normal form. 48/8812 useless extension candidates. Maximal degree in co-relation 109290. Up to 7491 conditions per place. [2024-06-28 03:34:41,420 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 724 selfloop transitions, 277 changer transitions 0/1004 dead transitions. [2024-06-28 03:34:41,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1004 transitions, 24260 flow [2024-06-28 03:34:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:34:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:34:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:34:41,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:34:41,421 INFO L175 Difference]: Start difference. First operand has 486 places, 946 transitions, 20622 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:34:41,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1004 transitions, 24260 flow [2024-06-28 03:34:49,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1004 transitions, 23855 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 03:34:49,742 INFO L231 Difference]: Finished difference. Result has 490 places, 972 transitions, 21674 flow [2024-06-28 03:34:49,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=20223, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21674, PETRI_PLACES=490, PETRI_TRANSITIONS=972} [2024-06-28 03:34:49,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-28 03:34:49,742 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 972 transitions, 21674 flow [2024-06-28 03:34:49,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:49,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:49,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:49,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 03:34:49,743 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:34:49,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:49,743 INFO L85 PathProgramCache]: Analyzing trace with hash -313628540, now seen corresponding path program 9 times [2024-06-28 03:34:49,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:49,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062437946] [2024-06-28 03:34:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:49,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:50,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062437946] [2024-06-28 03:34:50,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062437946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:50,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:50,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:34:50,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902694410] [2024-06-28 03:34:50,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:50,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:34:50,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:34:50,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:34:50,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:34:50,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 972 transitions, 21674 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:50,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:50,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:34:50,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:54,562 INFO L124 PetriNetUnfolderBase]: 5881/8779 cut-off events. [2024-06-28 03:34:54,562 INFO L125 PetriNetUnfolderBase]: For 1918906/1918951 co-relation queries the response was YES. [2024-06-28 03:34:54,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110608 conditions, 8779 events. 5881/8779 cut-off events. For 1918906/1918951 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49820 event pairs, 1344 based on Foata normal form. 44/8822 useless extension candidates. Maximal degree in co-relation 110385. Up to 8054 conditions per place. [2024-06-28 03:34:54,735 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 761 selfloop transitions, 231 changer transitions 0/995 dead transitions. [2024-06-28 03:34:54,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 995 transitions, 24254 flow [2024-06-28 03:34:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:34:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:34:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 03:34:54,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-28 03:34:54,737 INFO L175 Difference]: Start difference. First operand has 490 places, 972 transitions, 21674 flow. Second operand 10 states and 167 transitions. [2024-06-28 03:34:54,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 995 transitions, 24254 flow [2024-06-28 03:35:03,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 995 transitions, 23659 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-28 03:35:03,859 INFO L231 Difference]: Finished difference. Result has 493 places, 976 transitions, 21657 flow [2024-06-28 03:35:03,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=21083, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21657, PETRI_PLACES=493, PETRI_TRANSITIONS=976} [2024-06-28 03:35:03,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-28 03:35:03,860 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 976 transitions, 21657 flow [2024-06-28 03:35:03,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:03,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:03,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:03,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 03:35:03,861 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:03,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:03,861 INFO L85 PathProgramCache]: Analyzing trace with hash -313628850, now seen corresponding path program 10 times [2024-06-28 03:35:03,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:03,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091319445] [2024-06-28 03:35:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:03,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:05,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:05,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091319445] [2024-06-28 03:35:05,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091319445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:05,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:05,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:05,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601592673] [2024-06-28 03:35:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:05,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:05,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:05,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:05,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:35:05,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 976 transitions, 21657 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:05,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:05,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:35:05,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:08,571 INFO L124 PetriNetUnfolderBase]: 5783/8689 cut-off events. [2024-06-28 03:35:08,572 INFO L125 PetriNetUnfolderBase]: For 1936570/1936615 co-relation queries the response was YES. [2024-06-28 03:35:08,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109507 conditions, 8689 events. 5783/8689 cut-off events. For 1936570/1936615 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 49826 event pairs, 1278 based on Foata normal form. 46/8734 useless extension candidates. Maximal degree in co-relation 109284. Up to 7933 conditions per place. [2024-06-28 03:35:08,751 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 788 selfloop transitions, 150 changer transitions 0/996 dead transitions. [2024-06-28 03:35:08,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 996 transitions, 23668 flow [2024-06-28 03:35:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:35:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:35:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 03:35:08,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 03:35:08,752 INFO L175 Difference]: Start difference. First operand has 493 places, 976 transitions, 21657 flow. Second operand 9 states and 155 transitions. [2024-06-28 03:35:08,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 996 transitions, 23668 flow [2024-06-28 03:35:15,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 996 transitions, 23222 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-28 03:35:15,949 INFO L231 Difference]: Finished difference. Result has 493 places, 979 transitions, 21592 flow [2024-06-28 03:35:15,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=21211, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21592, PETRI_PLACES=493, PETRI_TRANSITIONS=979} [2024-06-28 03:35:15,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-28 03:35:15,950 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 979 transitions, 21592 flow [2024-06-28 03:35:15,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:15,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:15,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:15,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 03:35:15,951 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:15,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash -313617938, now seen corresponding path program 8 times [2024-06-28 03:35:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:15,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054912662] [2024-06-28 03:35:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:15,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:16,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:16,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054912662] [2024-06-28 03:35:16,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054912662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:16,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:16,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:16,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298731881] [2024-06-28 03:35:16,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:16,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:16,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:16,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:16,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:35:16,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 979 transitions, 21592 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:16,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:16,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:35:16,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:20,425 INFO L124 PetriNetUnfolderBase]: 5879/8779 cut-off events. [2024-06-28 03:35:20,425 INFO L125 PetriNetUnfolderBase]: For 1911337/1911382 co-relation queries the response was YES. [2024-06-28 03:35:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108976 conditions, 8779 events. 5879/8779 cut-off events. For 1911337/1911382 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 49795 event pairs, 1305 based on Foata normal form. 48/8826 useless extension candidates. Maximal degree in co-relation 108753. Up to 7518 conditions per place. [2024-06-28 03:35:20,605 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 728 selfloop transitions, 280 changer transitions 0/1011 dead transitions. [2024-06-28 03:35:20,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1011 transitions, 24544 flow [2024-06-28 03:35:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:35:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:35:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:35:20,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:35:20,606 INFO L175 Difference]: Start difference. First operand has 493 places, 979 transitions, 21592 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:35:20,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1011 transitions, 24544 flow [2024-06-28 03:35:29,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 1011 transitions, 24101 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-28 03:35:29,766 INFO L231 Difference]: Finished difference. Result has 494 places, 981 transitions, 21820 flow [2024-06-28 03:35:29,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=21149, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21820, PETRI_PLACES=494, PETRI_TRANSITIONS=981} [2024-06-28 03:35:29,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-28 03:35:29,767 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 981 transitions, 21820 flow [2024-06-28 03:35:29,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:29,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:29,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:29,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 03:35:29,768 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:29,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:29,768 INFO L85 PathProgramCache]: Analyzing trace with hash -313259888, now seen corresponding path program 9 times [2024-06-28 03:35:29,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:29,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39968697] [2024-06-28 03:35:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:29,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:30,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:30,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39968697] [2024-06-28 03:35:30,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39968697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:30,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:30,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:30,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828210216] [2024-06-28 03:35:30,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:30,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:30,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:30,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:35:30,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 981 transitions, 21820 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:30,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:30,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:35:30,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:34,223 INFO L124 PetriNetUnfolderBase]: 5867/8764 cut-off events. [2024-06-28 03:35:34,223 INFO L125 PetriNetUnfolderBase]: For 1904807/1904852 co-relation queries the response was YES. [2024-06-28 03:35:34,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108951 conditions, 8764 events. 5867/8764 cut-off events. For 1904807/1904852 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49767 event pairs, 1304 based on Foata normal form. 48/8811 useless extension candidates. Maximal degree in co-relation 108727. Up to 7514 conditions per place. [2024-06-28 03:35:34,385 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 728 selfloop transitions, 277 changer transitions 0/1008 dead transitions. [2024-06-28 03:35:34,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 1008 transitions, 24652 flow [2024-06-28 03:35:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:35:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:35:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:35:34,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:35:34,386 INFO L175 Difference]: Start difference. First operand has 494 places, 981 transitions, 21820 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:35:34,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 1008 transitions, 24652 flow [2024-06-28 03:35:43,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1008 transitions, 24159 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-28 03:35:43,410 INFO L231 Difference]: Finished difference. Result has 497 places, 981 transitions, 21911 flow [2024-06-28 03:35:43,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=21333, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21911, PETRI_PLACES=497, PETRI_TRANSITIONS=981} [2024-06-28 03:35:43,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-28 03:35:43,411 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 981 transitions, 21911 flow [2024-06-28 03:35:43,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:43,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:43,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:43,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 03:35:43,412 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:43,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1977268120, now seen corresponding path program 7 times [2024-06-28 03:35:43,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:43,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192844788] [2024-06-28 03:35:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:43,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:44,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:44,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192844788] [2024-06-28 03:35:44,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192844788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:44,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:44,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:35:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974813257] [2024-06-28 03:35:44,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:44,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:35:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:35:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:35:44,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:35:44,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 981 transitions, 21911 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:44,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:44,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:35:44,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:47,815 INFO L124 PetriNetUnfolderBase]: 5771/8683 cut-off events. [2024-06-28 03:35:47,815 INFO L125 PetriNetUnfolderBase]: For 1914929/1914929 co-relation queries the response was YES. [2024-06-28 03:35:47,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108621 conditions, 8683 events. 5771/8683 cut-off events. For 1914929/1914929 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 49949 event pairs, 1744 based on Foata normal form. 4/8686 useless extension candidates. Maximal degree in co-relation 108397. Up to 8207 conditions per place. [2024-06-28 03:35:47,981 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 916 selfloop transitions, 41 changer transitions 0/1015 dead transitions. [2024-06-28 03:35:47,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1015 transitions, 24184 flow [2024-06-28 03:35:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:35:47,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:35:47,982 INFO L175 Difference]: Start difference. First operand has 497 places, 981 transitions, 21911 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:35:47,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1015 transitions, 24184 flow [2024-06-28 03:35:56,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1015 transitions, 23624 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 03:35:56,900 INFO L231 Difference]: Finished difference. Result has 497 places, 987 transitions, 21608 flow [2024-06-28 03:35:56,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=21351, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21608, PETRI_PLACES=497, PETRI_TRANSITIONS=987} [2024-06-28 03:35:56,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-28 03:35:56,900 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 987 transitions, 21608 flow [2024-06-28 03:35:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:56,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:56,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:56,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 03:35:56,901 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:56,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash -426070232, now seen corresponding path program 8 times [2024-06-28 03:35:56,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:56,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476060983] [2024-06-28 03:35:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:57,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:57,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476060983] [2024-06-28 03:35:57,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476060983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:57,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:57,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482890478] [2024-06-28 03:35:57,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:57,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:57,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:57,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:35:57,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 987 transitions, 21608 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:57,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:57,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:35:57,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:01,184 INFO L124 PetriNetUnfolderBase]: 5807/8732 cut-off events. [2024-06-28 03:36:01,184 INFO L125 PetriNetUnfolderBase]: For 1925618/1925618 co-relation queries the response was YES. [2024-06-28 03:36:01,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108547 conditions, 8732 events. 5807/8732 cut-off events. For 1925618/1925618 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 50261 event pairs, 1755 based on Foata normal form. 4/8735 useless extension candidates. Maximal degree in co-relation 108323. Up to 8297 conditions per place. [2024-06-28 03:36:01,343 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 934 selfloop transitions, 33 changer transitions 0/1025 dead transitions. [2024-06-28 03:36:01,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1025 transitions, 24202 flow [2024-06-28 03:36:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:36:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:36:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:36:01,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-28 03:36:01,344 INFO L175 Difference]: Start difference. First operand has 497 places, 987 transitions, 21608 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:36:01,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1025 transitions, 24202 flow [2024-06-28 03:36:09,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1025 transitions, 24021 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-28 03:36:09,629 INFO L231 Difference]: Finished difference. Result has 502 places, 998 transitions, 21825 flow [2024-06-28 03:36:09,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=21427, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21825, PETRI_PLACES=502, PETRI_TRANSITIONS=998} [2024-06-28 03:36:09,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-28 03:36:09,630 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 998 transitions, 21825 flow [2024-06-28 03:36:09,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:36:09,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:09,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:09,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 03:36:09,631 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:09,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1700849230, now seen corresponding path program 9 times [2024-06-28 03:36:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:09,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115453711] [2024-06-28 03:36:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:10,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115453711] [2024-06-28 03:36:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115453711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:10,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:36:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315730717] [2024-06-28 03:36:10,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:10,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:36:10,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:36:10,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:36:10,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:36:10,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 998 transitions, 21825 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:36:10,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:10,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:36:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:13,860 INFO L124 PetriNetUnfolderBase]: 5801/8724 cut-off events. [2024-06-28 03:36:13,860 INFO L125 PetriNetUnfolderBase]: For 1933560/1933560 co-relation queries the response was YES. [2024-06-28 03:36:13,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108498 conditions, 8724 events. 5801/8724 cut-off events. For 1933560/1933560 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 50234 event pairs, 1773 based on Foata normal form. 2/8725 useless extension candidates. Maximal degree in co-relation 108271. Up to 8337 conditions per place. [2024-06-28 03:36:14,026 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 938 selfloop transitions, 19 changer transitions 0/1015 dead transitions. [2024-06-28 03:36:14,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 1015 transitions, 23828 flow [2024-06-28 03:36:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:36:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:36:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:36:14,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 03:36:14,027 INFO L175 Difference]: Start difference. First operand has 502 places, 998 transitions, 21825 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:36:14,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 1015 transitions, 23828 flow