./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 22:03:43,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:03:43,810 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:03:43,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:03:43,817 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:03:43,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:03:43,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:03:43,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:03:43,849 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:03:43,853 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:03:43,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:03:43,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:03:43,854 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:03:43,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:03:43,856 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:03:43,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:03:43,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:03:43,857 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:03:43,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:03:43,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:03:43,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:03:43,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:03:43,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:03:43,859 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:03:43,859 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:03:43,859 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:03:43,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:03:43,860 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:03:43,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:03:43,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:03:43,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:03:43,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:03:43,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:03:43,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:03:43,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:03:43,863 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:03:43,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:03:43,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:03:43,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:03:43,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:03:43,864 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:03:43,864 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:03:43,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:03:43,865 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:03:44,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:03:44,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:03:44,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:03:44,154 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:03:44,155 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:03:44,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 22:03:44,333 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:03:44,333 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:03:44,334 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 22:03:45,595 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:03:45,876 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:03:45,877 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 22:03:45,892 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bdaab2ab/6c99e1c8fb0143e49613d68946669cca/FLAG2c6e3ba39 [2024-06-21 22:03:45,904 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bdaab2ab/6c99e1c8fb0143e49613d68946669cca [2024-06-21 22:03:45,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:03:45,906 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:03:45,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:03:45,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:03:45,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:03:45,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:03:44" (1/2) ... [2024-06-21 22:03:45,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2106327e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:03:45, skipping insertion in model container [2024-06-21 22:03:45,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:03:44" (1/2) ... [2024-06-21 22:03:45,916 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1bfa583 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:03:45, skipping insertion in model container [2024-06-21 22:03:45,916 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:03:45" (2/2) ... [2024-06-21 22:03:45,916 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2106327e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:45, skipping insertion in model container [2024-06-21 22:03:45,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:03:45" (2/2) ... [2024-06-21 22:03:45,917 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:03:46,001 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:03:46,003 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-21 22:03:46,004 INFO L97 edCorrectnessWitness]: Location invariant before [L833-L833] ((((((((((((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-21 22:03:46,004 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] ((((((((((((((((! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (y$mem_tmp == 0 || y$mem_tmp == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 1)) && (y$w_buff1 == 0 || y$w_buff1 == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-21 22:03:46,004 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:03:46,005 INFO L106 edCorrectnessWitness]: ghost_update [L829-L829] multithreaded = 1; [2024-06-21 22:03:46,053 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:03:46,505 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:03:46,520 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:03:46,671 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:03:46,709 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:03:46,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46 WrapperNode [2024-06-21 22:03:46,710 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:03:46,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:03:46,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:03:46,712 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:03:46,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,775 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-21 22:03:46,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:03:46,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:03:46,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:03:46,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:03:46,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,795 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,811 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 22:03:46,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,835 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,838 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,854 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,857 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:03:46,858 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:03:46,858 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:03:46,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:03:46,859 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (1/1) ... [2024-06-21 22:03:46,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:03:46,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:03:46,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 22:03:46,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 22:03:46,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:03:46,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:03:46,944 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:03:46,945 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:03:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:03:46,945 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:03:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 22:03:46,945 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 22:03:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:03:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:03:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:03:46,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:03:46,951 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 22:03:47,074 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:03:47,076 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:03:47,441 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:03:47,442 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:03:47,645 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:03:47,645 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:03:47,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:03:47 BoogieIcfgContainer [2024-06-21 22:03:47,646 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:03:47,650 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:03:47,650 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:03:47,653 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:03:47,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:03:44" (1/4) ... [2024-06-21 22:03:47,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2163256f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:03:47, skipping insertion in model container [2024-06-21 22:03:47,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:03:45" (2/4) ... [2024-06-21 22:03:47,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2163256f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:03:47, skipping insertion in model container [2024-06-21 22:03:47,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:03:46" (3/4) ... [2024-06-21 22:03:47,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2163256f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:03:47, skipping insertion in model container [2024-06-21 22:03:47,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:03:47" (4/4) ... [2024-06-21 22:03:47,657 INFO L112 eAbstractionObserver]: Analyzing ICFG safe026_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 22:03:47,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:03:47,674 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 22:03:47,674 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:03:47,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:03:47,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 22:03:47,795 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2024-06-21 22:03:47,795 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:03:47,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 36 events. 0/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 22:03:47,797 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 39 transitions, 90 flow [2024-06-21 22:03:47,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 30 transitions, 69 flow [2024-06-21 22:03:47,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:03:47,822 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;@6e310e93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:03:47,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 22:03:47,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:03:47,829 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 22:03:47,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:03:47,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:47,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:03:47,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:47,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash 367548594, now seen corresponding path program 1 times [2024-06-21 22:03:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:47,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897579826] [2024-06-21 22:03:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:47,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:48,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897579826] [2024-06-21 22:03:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897579826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:03:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611596348] [2024-06-21 22:03:48,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:48,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:03:48,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:03:49,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:03:49,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-21 22:03:49,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:49,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:49,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-21 22:03:49,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:49,495 INFO L124 PetriNetUnfolderBase]: 1150/1745 cut-off events. [2024-06-21 22:03:49,496 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 22:03:49,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3564 conditions, 1745 events. 1150/1745 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8071 event pairs, 639 based on Foata normal form. 3/1711 useless extension candidates. Maximal degree in co-relation 3552. Up to 1726 conditions per place. [2024-06-21 22:03:49,514 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 22:03:49,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 173 flow [2024-06-21 22:03:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:03:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:03:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 22:03:49,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6239316239316239 [2024-06-21 22:03:49,528 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 69 flow. Second operand 3 states and 73 transitions. [2024-06-21 22:03:49,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 173 flow [2024-06-21 22:03:49,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 22:03:49,533 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 96 flow [2024-06-21 22:03:49,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-06-21 22:03:49,538 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-06-21 22:03:49,538 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 96 flow [2024-06-21 22:03:49,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:49,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:49,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:49,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:03:49,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:49,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:49,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1026900689, now seen corresponding path program 1 times [2024-06-21 22:03:49,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:49,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86626555] [2024-06-21 22:03:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:49,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:50,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:50,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86626555] [2024-06-21 22:03:50,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86626555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:50,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:50,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 22:03:50,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744023238] [2024-06-21 22:03:50,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:50,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 22:03:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 22:03:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 22:03:50,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-21 22:03:50,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:50,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:50,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-21 22:03:50,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:50,519 INFO L124 PetriNetUnfolderBase]: 1154/1750 cut-off events. [2024-06-21 22:03:50,519 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-06-21 22:03:50,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4072 conditions, 1750 events. 1154/1750 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7896 event pairs, 630 based on Foata normal form. 5/1753 useless extension candidates. Maximal degree in co-relation 4060. Up to 1716 conditions per place. [2024-06-21 22:03:50,530 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 43 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 22:03:50,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 258 flow [2024-06-21 22:03:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:03:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:03:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 22:03:50,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-21 22:03:50,533 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 96 flow. Second operand 4 states and 94 transitions. [2024-06-21 22:03:50,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 258 flow [2024-06-21 22:03:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:03:50,535 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 152 flow [2024-06-21 22:03:50,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-06-21 22:03:50,536 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-06-21 22:03:50,536 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 152 flow [2024-06-21 22:03:50,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:50,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:50,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:50,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:03:50,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:50,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1769150977, now seen corresponding path program 1 times [2024-06-21 22:03:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:50,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048902473] [2024-06-21 22:03:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:51,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:51,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048902473] [2024-06-21 22:03:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048902473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:51,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:51,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 22:03:51,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296590860] [2024-06-21 22:03:51,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:51,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 22:03:51,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:51,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 22:03:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 22:03:51,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-21 22:03:51,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:51,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:51,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-21 22:03:51,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:51,463 INFO L124 PetriNetUnfolderBase]: 1409/2118 cut-off events. [2024-06-21 22:03:51,463 INFO L125 PetriNetUnfolderBase]: For 1023/1023 co-relation queries the response was YES. [2024-06-21 22:03:51,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5544 conditions, 2118 events. 1409/2118 cut-off events. For 1023/1023 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9353 event pairs, 626 based on Foata normal form. 7/2124 useless extension candidates. Maximal degree in co-relation 5529. Up to 1980 conditions per place. [2024-06-21 22:03:51,480 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 63 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2024-06-21 22:03:51,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 81 transitions, 445 flow [2024-06-21 22:03:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:03:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:03:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 22:03:51,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102564102564103 [2024-06-21 22:03:51,482 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 152 flow. Second operand 5 states and 119 transitions. [2024-06-21 22:03:51,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 81 transitions, 445 flow [2024-06-21 22:03:51,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 81 transitions, 430 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 22:03:51,486 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 255 flow [2024-06-21 22:03:51,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2024-06-21 22:03:51,487 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-06-21 22:03:51,487 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 255 flow [2024-06-21 22:03:51,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:51,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:51,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:51,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:03:51,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:51,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash -990893840, now seen corresponding path program 1 times [2024-06-21 22:03:51,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:51,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411212528] [2024-06-21 22:03:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:51,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:52,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:52,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411212528] [2024-06-21 22:03:52,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411212528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:52,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:52,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:03:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497699095] [2024-06-21 22:03:52,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:52,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:03:52,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:52,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:03:52,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:03:52,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-21 22:03:52,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 255 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:52,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:52,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-21 22:03:52,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:52,892 INFO L124 PetriNetUnfolderBase]: 1431/2152 cut-off events. [2024-06-21 22:03:52,892 INFO L125 PetriNetUnfolderBase]: For 2510/2512 co-relation queries the response was YES. [2024-06-21 22:03:52,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6766 conditions, 2152 events. 1431/2152 cut-off events. For 2510/2512 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9593 event pairs, 435 based on Foata normal form. 7/2158 useless extension candidates. Maximal degree in co-relation 6747. Up to 1923 conditions per place. [2024-06-21 22:03:52,909 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 74 selfloop transitions, 26 changer transitions 0/104 dead transitions. [2024-06-21 22:03:52,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 104 transitions, 655 flow [2024-06-21 22:03:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 22:03:52,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 22:03:52,914 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 255 flow. Second operand 6 states and 144 transitions. [2024-06-21 22:03:52,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 104 transitions, 655 flow [2024-06-21 22:03:52,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 104 transitions, 651 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 22:03:52,925 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 416 flow [2024-06-21 22:03:52,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-06-21 22:03:52,927 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 19 predicate places. [2024-06-21 22:03:52,927 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 416 flow [2024-06-21 22:03:52,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:52,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:52,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:03:52,928 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)] === [2024-06-21 22:03:52,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -652937216, now seen corresponding path program 1 times [2024-06-21 22:03:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51227853] [2024-06-21 22:03:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:52,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:53,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:53,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51227853] [2024-06-21 22:03:53,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51227853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:53,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:53,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:53,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374889775] [2024-06-21 22:03:53,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:53,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:53,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:53,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:53,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:53,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-21 22:03:53,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:53,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:53,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-21 22:03:53,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:54,480 INFO L124 PetriNetUnfolderBase]: 1513/2298 cut-off events. [2024-06-21 22:03:54,481 INFO L125 PetriNetUnfolderBase]: For 4974/4980 co-relation queries the response was YES. [2024-06-21 22:03:54,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8409 conditions, 2298 events. 1513/2298 cut-off events. For 4974/4980 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10612 event pairs, 307 based on Foata normal form. 28/2325 useless extension candidates. Maximal degree in co-relation 8384. Up to 1887 conditions per place. [2024-06-21 22:03:54,501 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 82 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-21 22:03:54,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 114 transitions, 824 flow [2024-06-21 22:03:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:03:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:03:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 22:03:54,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007326007326007 [2024-06-21 22:03:54,504 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 416 flow. Second operand 7 states and 164 transitions. [2024-06-21 22:03:54,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 114 transitions, 824 flow [2024-06-21 22:03:54,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 114 transitions, 814 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-21 22:03:54,512 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 480 flow [2024-06-21 22:03:54,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2024-06-21 22:03:54,513 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 25 predicate places. [2024-06-21 22:03:54,514 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 480 flow [2024-06-21 22:03:54,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:54,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:54,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:54,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:03:54,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:54,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:54,515 INFO L85 PathProgramCache]: Analyzing trace with hash -866148101, now seen corresponding path program 1 times [2024-06-21 22:03:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573704630] [2024-06-21 22:03:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:54,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:55,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:55,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573704630] [2024-06-21 22:03:55,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573704630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:55,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:55,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:03:55,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89091557] [2024-06-21 22:03:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:55,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:03:55,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:03:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:03:55,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:03:55,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 480 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:55,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:55,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:03:55,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:55,577 INFO L124 PetriNetUnfolderBase]: 1503/2282 cut-off events. [2024-06-21 22:03:55,577 INFO L125 PetriNetUnfolderBase]: For 6177/6177 co-relation queries the response was YES. [2024-06-21 22:03:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8927 conditions, 2282 events. 1503/2282 cut-off events. For 6177/6177 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10455 event pairs, 534 based on Foata normal form. 4/2285 useless extension candidates. Maximal degree in co-relation 8898. Up to 2252 conditions per place. [2024-06-21 22:03:55,600 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 66 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-21 22:03:55,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 676 flow [2024-06-21 22:03:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:03:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:03:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-21 22:03:55,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441025641025641 [2024-06-21 22:03:55,601 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 480 flow. Second operand 5 states and 86 transitions. [2024-06-21 22:03:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 676 flow [2024-06-21 22:03:55,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 616 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 22:03:55,612 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 472 flow [2024-06-21 22:03:55,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=472, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-21 22:03:55,615 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2024-06-21 22:03:55,615 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 472 flow [2024-06-21 22:03:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:55,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:55,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:03:55,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:55,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash 305369400, now seen corresponding path program 1 times [2024-06-21 22:03:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:55,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063538236] [2024-06-21 22:03:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:55,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:56,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:56,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063538236] [2024-06-21 22:03:56,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063538236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:56,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470546605] [2024-06-21 22:03:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:56,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:03:56,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 472 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:56,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:56,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:03:56,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:56,826 INFO L124 PetriNetUnfolderBase]: 1515/2301 cut-off events. [2024-06-21 22:03:56,826 INFO L125 PetriNetUnfolderBase]: For 7109/7111 co-relation queries the response was YES. [2024-06-21 22:03:56,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9012 conditions, 2301 events. 1515/2301 cut-off events. For 7109/7111 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10564 event pairs, 466 based on Foata normal form. 10/2310 useless extension candidates. Maximal degree in co-relation 8980. Up to 2150 conditions per place. [2024-06-21 22:03:56,859 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 73 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-21 22:03:56,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 768 flow [2024-06-21 22:03:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 22:03:56,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 22:03:56,861 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 472 flow. Second operand 6 states and 111 transitions. [2024-06-21 22:03:56,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 768 flow [2024-06-21 22:03:56,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 746 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 22:03:56,874 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 542 flow [2024-06-21 22:03:56,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=542, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 22:03:56,876 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-06-21 22:03:56,876 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 542 flow [2024-06-21 22:03:56,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:56,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:56,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:56,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:03:56,877 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:56,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:56,878 INFO L85 PathProgramCache]: Analyzing trace with hash 855364890, now seen corresponding path program 2 times [2024-06-21 22:03:56,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:56,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854474296] [2024-06-21 22:03:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:56,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:57,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:57,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854474296] [2024-06-21 22:03:57,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854474296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:57,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:57,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:03:57,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830029408] [2024-06-21 22:03:57,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:57,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:03:57,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:03:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:03:57,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:03:57,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 542 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:57,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:57,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:03:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:58,090 INFO L124 PetriNetUnfolderBase]: 1492/2263 cut-off events. [2024-06-21 22:03:58,090 INFO L125 PetriNetUnfolderBase]: For 8409/8409 co-relation queries the response was YES. [2024-06-21 22:03:58,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9184 conditions, 2263 events. 1492/2263 cut-off events. For 8409/8409 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10268 event pairs, 508 based on Foata normal form. 4/2266 useless extension candidates. Maximal degree in co-relation 9150. Up to 2224 conditions per place. [2024-06-21 22:03:58,106 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 75 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-21 22:03:58,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 767 flow [2024-06-21 22:03:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 22:03:58,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-06-21 22:03:58,109 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 542 flow. Second operand 6 states and 101 transitions. [2024-06-21 22:03:58,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 767 flow [2024-06-21 22:03:58,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 744 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 22:03:58,125 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 562 flow [2024-06-21 22:03:58,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=562, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-21 22:03:58,127 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-06-21 22:03:58,127 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 562 flow [2024-06-21 22:03:58,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:58,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:58,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:58,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:03:58,129 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:58,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:58,129 INFO L85 PathProgramCache]: Analyzing trace with hash 311091256, now seen corresponding path program 1 times [2024-06-21 22:03:58,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:58,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945868328] [2024-06-21 22:03:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:58,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:03:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:03:59,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:03:59,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945868328] [2024-06-21 22:03:59,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945868328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:03:59,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:03:59,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:03:59,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255358387] [2024-06-21 22:03:59,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:03:59,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:03:59,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:03:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:03:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:03:59,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:03:59,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 562 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:59,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:03:59,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:03:59,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:03:59,829 INFO L124 PetriNetUnfolderBase]: 1484/2251 cut-off events. [2024-06-21 22:03:59,829 INFO L125 PetriNetUnfolderBase]: For 9637/9637 co-relation queries the response was YES. [2024-06-21 22:03:59,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 2251 events. 1484/2251 cut-off events. For 9637/9637 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10253 event pairs, 489 based on Foata normal form. 4/2254 useless extension candidates. Maximal degree in co-relation 9242. Up to 2203 conditions per place. [2024-06-21 22:03:59,845 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 76 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-21 22:03:59,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 794 flow [2024-06-21 22:03:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:03:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:03:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 22:03:59,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2024-06-21 22:03:59,847 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 562 flow. Second operand 6 states and 101 transitions. [2024-06-21 22:03:59,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 794 flow [2024-06-21 22:03:59,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 770 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 22:03:59,868 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 589 flow [2024-06-21 22:03:59,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=589, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-21 22:03:59,869 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 35 predicate places. [2024-06-21 22:03:59,869 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 589 flow [2024-06-21 22:03:59,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:03:59,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:03:59,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:03:59,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:03:59,870 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:03:59,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:03:59,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1053886804, now seen corresponding path program 1 times [2024-06-21 22:03:59,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:03:59,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549723499] [2024-06-21 22:03:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:03:59,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:03:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:00,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:00,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549723499] [2024-06-21 22:04:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549723499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:00,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087082639] [2024-06-21 22:04:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:00,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:01,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:01,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 589 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:01,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:01,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:01,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:01,518 INFO L124 PetriNetUnfolderBase]: 1479/2244 cut-off events. [2024-06-21 22:04:01,519 INFO L125 PetriNetUnfolderBase]: For 11021/11021 co-relation queries the response was YES. [2024-06-21 22:04:01,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 2244 events. 1479/2244 cut-off events. For 11021/11021 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10220 event pairs, 502 based on Foata normal form. 2/2245 useless extension candidates. Maximal degree in co-relation 9495. Up to 2187 conditions per place. [2024-06-21 22:04:01,536 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 72 selfloop transitions, 16 changer transitions 0/91 dead transitions. [2024-06-21 22:04:01,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 807 flow [2024-06-21 22:04:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:04:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:04:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 22:04:01,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 22:04:01,538 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 589 flow. Second operand 6 states and 102 transitions. [2024-06-21 22:04:01,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 807 flow [2024-06-21 22:04:01,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 774 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:01,555 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 600 flow [2024-06-21 22:04:01,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=600, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-06-21 22:04:01,556 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 37 predicate places. [2024-06-21 22:04:01,557 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 600 flow [2024-06-21 22:04:01,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:01,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:01,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:01,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:04:01,559 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:01,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:01,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1398444503, now seen corresponding path program 1 times [2024-06-21 22:04:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:01,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763636522] [2024-06-21 22:04:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:01,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763636522] [2024-06-21 22:04:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763636522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:02,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:02,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47798683] [2024-06-21 22:04:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:02,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:02,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:02,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 600 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:02,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:02,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:02,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:03,023 INFO L124 PetriNetUnfolderBase]: 1501/2278 cut-off events. [2024-06-21 22:04:03,024 INFO L125 PetriNetUnfolderBase]: For 12979/12986 co-relation queries the response was YES. [2024-06-21 22:04:03,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9833 conditions, 2278 events. 1501/2278 cut-off events. For 12979/12986 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10409 event pairs, 429 based on Foata normal form. 8/2285 useless extension candidates. Maximal degree in co-relation 9797. Up to 2017 conditions per place. [2024-06-21 22:04:03,039 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 77 selfloop transitions, 33 changer transitions 0/113 dead transitions. [2024-06-21 22:04:03,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 113 transitions, 1024 flow [2024-06-21 22:04:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 22:04:03,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 22:04:03,041 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 600 flow. Second operand 7 states and 133 transitions. [2024-06-21 22:04:03,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 113 transitions, 1024 flow [2024-06-21 22:04:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 982 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:03,058 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 678 flow [2024-06-21 22:04:03,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=678, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-21 22:04:03,059 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-06-21 22:04:03,059 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 678 flow [2024-06-21 22:04:03,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:03,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:03,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:03,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:04:03,060 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:03,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:03,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1398534713, now seen corresponding path program 2 times [2024-06-21 22:04:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:03,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5836330] [2024-06-21 22:04:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:03,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:03,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5836330] [2024-06-21 22:04:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5836330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:03,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:03,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140179170] [2024-06-21 22:04:03,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:03,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:03,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:04,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:04,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 678 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:04,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:04,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:04,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:04,463 INFO L124 PetriNetUnfolderBase]: 1491/2264 cut-off events. [2024-06-21 22:04:04,463 INFO L125 PetriNetUnfolderBase]: For 15168/15174 co-relation queries the response was YES. [2024-06-21 22:04:04,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10321 conditions, 2264 events. 1491/2264 cut-off events. For 15168/15174 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10354 event pairs, 439 based on Foata normal form. 8/2271 useless extension candidates. Maximal degree in co-relation 10284. Up to 2072 conditions per place. [2024-06-21 22:04:04,480 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 76 selfloop transitions, 29 changer transitions 0/108 dead transitions. [2024-06-21 22:04:04,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 1004 flow [2024-06-21 22:04:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 22:04:04,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46886446886446886 [2024-06-21 22:04:04,482 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 678 flow. Second operand 7 states and 128 transitions. [2024-06-21 22:04:04,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 1004 flow [2024-06-21 22:04:04,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 108 transitions, 955 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:04,506 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 695 flow [2024-06-21 22:04:04,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=695, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2024-06-21 22:04:04,507 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2024-06-21 22:04:04,507 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 695 flow [2024-06-21 22:04:04,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:04,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:04,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:04:04,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:04,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1893465483, now seen corresponding path program 1 times [2024-06-21 22:04:04,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:04,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029842272] [2024-06-21 22:04:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:05,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:05,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029842272] [2024-06-21 22:04:05,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029842272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:05,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:05,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:05,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504617005] [2024-06-21 22:04:05,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:05,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:05,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:05,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 695 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:05,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:05,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:05,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:06,126 INFO L124 PetriNetUnfolderBase]: 1525/2317 cut-off events. [2024-06-21 22:04:06,126 INFO L125 PetriNetUnfolderBase]: For 17646/17648 co-relation queries the response was YES. [2024-06-21 22:04:06,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10812 conditions, 2317 events. 1525/2317 cut-off events. For 17646/17648 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10634 event pairs, 427 based on Foata normal form. 10/2326 useless extension candidates. Maximal degree in co-relation 10773. Up to 2142 conditions per place. [2024-06-21 22:04:06,144 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 84 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-21 22:04:06,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 999 flow [2024-06-21 22:04:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:04:06,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-21 22:04:06,146 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 695 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:04:06,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 999 flow [2024-06-21 22:04:06,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 109 transitions, 929 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:06,170 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 709 flow [2024-06-21 22:04:06,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=709, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2024-06-21 22:04:06,171 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 44 predicate places. [2024-06-21 22:04:06,172 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 709 flow [2024-06-21 22:04:06,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:06,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:06,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:06,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:04:06,173 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:06,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1666948217, now seen corresponding path program 2 times [2024-06-21 22:04:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:06,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340394552] [2024-06-21 22:04:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:07,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340394552] [2024-06-21 22:04:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340394552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:07,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:07,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:07,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150849908] [2024-06-21 22:04:07,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:07,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:07,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:07,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:07,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 709 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:07,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:07,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:07,759 INFO L124 PetriNetUnfolderBase]: 1542/2343 cut-off events. [2024-06-21 22:04:07,760 INFO L125 PetriNetUnfolderBase]: For 20121/20121 co-relation queries the response was YES. [2024-06-21 22:04:07,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11289 conditions, 2343 events. 1542/2343 cut-off events. For 20121/20121 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10723 event pairs, 482 based on Foata normal form. 4/2346 useless extension candidates. Maximal degree in co-relation 11249. Up to 2286 conditions per place. [2024-06-21 22:04:07,780 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 91 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-06-21 22:04:07,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 995 flow [2024-06-21 22:04:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 22:04:07,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-21 22:04:07,782 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 709 flow. Second operand 7 states and 116 transitions. [2024-06-21 22:04:07,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 995 flow [2024-06-21 22:04:07,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 935 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:07,807 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 710 flow [2024-06-21 22:04:07,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2024-06-21 22:04:07,808 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2024-06-21 22:04:07,808 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 710 flow [2024-06-21 22:04:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:07,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:07,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:07,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:04:07,809 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:07,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1689246087, now seen corresponding path program 3 times [2024-06-21 22:04:07,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:07,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626585564] [2024-06-21 22:04:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:08,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:08,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626585564] [2024-06-21 22:04:08,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626585564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:08,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:08,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003931094] [2024-06-21 22:04:08,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:08,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:08,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:08,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:08,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 710 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:08,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:08,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:08,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:09,431 INFO L124 PetriNetUnfolderBase]: 1559/2370 cut-off events. [2024-06-21 22:04:09,431 INFO L125 PetriNetUnfolderBase]: For 22792/22792 co-relation queries the response was YES. [2024-06-21 22:04:09,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11586 conditions, 2370 events. 1559/2370 cut-off events. For 22792/22792 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10880 event pairs, 487 based on Foata normal form. 4/2373 useless extension candidates. Maximal degree in co-relation 11545. Up to 2277 conditions per place. [2024-06-21 22:04:09,449 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 86 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-21 22:04:09,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 109 transitions, 1004 flow [2024-06-21 22:04:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 22:04:09,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:04:09,451 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 710 flow. Second operand 7 states and 117 transitions. [2024-06-21 22:04:09,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 109 transitions, 1004 flow [2024-06-21 22:04:09,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 109 transitions, 961 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:09,484 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 749 flow [2024-06-21 22:04:09,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=749, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-06-21 22:04:09,485 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2024-06-21 22:04:09,485 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 749 flow [2024-06-21 22:04:09,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:09,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:09,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:09,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:04:09,486 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:09,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:09,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1689246304, now seen corresponding path program 1 times [2024-06-21 22:04:09,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:09,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494037289] [2024-06-21 22:04:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:10,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:10,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494037289] [2024-06-21 22:04:10,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494037289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:10,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:10,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:10,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442916007] [2024-06-21 22:04:10,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:10,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:10,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:10,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:10,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:10,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:10,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 749 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:10,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:10,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:10,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:10,924 INFO L124 PetriNetUnfolderBase]: 1539/2332 cut-off events. [2024-06-21 22:04:10,924 INFO L125 PetriNetUnfolderBase]: For 25407/25413 co-relation queries the response was YES. [2024-06-21 22:04:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11704 conditions, 2332 events. 1539/2332 cut-off events. For 25407/25413 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10594 event pairs, 436 based on Foata normal form. 6/2337 useless extension candidates. Maximal degree in co-relation 11662. Up to 2165 conditions per place. [2024-06-21 22:04:10,944 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 80 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-21 22:04:10,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 111 transitions, 1027 flow [2024-06-21 22:04:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:04:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:04:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 22:04:10,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829059829059829 [2024-06-21 22:04:10,946 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 749 flow. Second operand 6 states and 113 transitions. [2024-06-21 22:04:10,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 111 transitions, 1027 flow [2024-06-21 22:04:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 111 transitions, 965 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:10,976 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 758 flow [2024-06-21 22:04:10,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=758, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-06-21 22:04:10,977 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-06-21 22:04:10,977 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 758 flow [2024-06-21 22:04:10,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:10,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:10,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:04:10,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:10,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1674566777, now seen corresponding path program 4 times [2024-06-21 22:04:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:10,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049893324] [2024-06-21 22:04:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:12,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049893324] [2024-06-21 22:04:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049893324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:12,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:12,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741195706] [2024-06-21 22:04:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:12,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:12,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:12,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:12,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 758 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:12,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:12,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:12,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:12,680 INFO L124 PetriNetUnfolderBase]: 1531/2318 cut-off events. [2024-06-21 22:04:12,680 INFO L125 PetriNetUnfolderBase]: For 24728/24728 co-relation queries the response was YES. [2024-06-21 22:04:12,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11510 conditions, 2318 events. 1531/2318 cut-off events. For 24728/24728 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10486 event pairs, 461 based on Foata normal form. 4/2321 useless extension candidates. Maximal degree in co-relation 11467. Up to 2247 conditions per place. [2024-06-21 22:04:12,692 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 94 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-21 22:04:12,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 111 transitions, 1054 flow [2024-06-21 22:04:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 22:04:12,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-21 22:04:12,699 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 758 flow. Second operand 7 states and 116 transitions. [2024-06-21 22:04:12,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 111 transitions, 1054 flow [2024-06-21 22:04:12,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 111 transitions, 998 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:12,726 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 769 flow [2024-06-21 22:04:12,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=769, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2024-06-21 22:04:12,727 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 51 predicate places. [2024-06-21 22:04:12,727 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 769 flow [2024-06-21 22:04:12,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:12,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:12,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:12,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:04:12,728 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:12,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 402047385, now seen corresponding path program 1 times [2024-06-21 22:04:12,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:12,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975134582] [2024-06-21 22:04:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:13,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:13,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975134582] [2024-06-21 22:04:13,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975134582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:13,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:13,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:13,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235839345] [2024-06-21 22:04:13,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:13,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:13,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:13,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:13,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:13,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 769 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:13,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:13,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:13,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:14,256 INFO L124 PetriNetUnfolderBase]: 1744/2673 cut-off events. [2024-06-21 22:04:14,256 INFO L125 PetriNetUnfolderBase]: For 32443/32445 co-relation queries the response was YES. [2024-06-21 22:04:14,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13300 conditions, 2673 events. 1744/2673 cut-off events. For 32443/32445 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12829 event pairs, 301 based on Foata normal form. 18/2690 useless extension candidates. Maximal degree in co-relation 13256. Up to 1910 conditions per place. [2024-06-21 22:04:14,275 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 105 selfloop transitions, 31 changer transitions 0/139 dead transitions. [2024-06-21 22:04:14,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 1303 flow [2024-06-21 22:04:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 22:04:14,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 22:04:14,277 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 769 flow. Second operand 8 states and 152 transitions. [2024-06-21 22:04:14,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 1303 flow [2024-06-21 22:04:14,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1254 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:14,315 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 889 flow [2024-06-21 22:04:14,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=889, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2024-06-21 22:04:14,315 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 56 predicate places. [2024-06-21 22:04:14,316 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 889 flow [2024-06-21 22:04:14,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:14,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:14,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:14,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:04:14,317 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:14,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash 402107835, now seen corresponding path program 2 times [2024-06-21 22:04:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:14,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933145068] [2024-06-21 22:04:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:14,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:15,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:15,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933145068] [2024-06-21 22:04:15,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933145068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:15,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:15,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:15,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551236583] [2024-06-21 22:04:15,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:15,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:15,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:15,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:15,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 889 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:15,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:15,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:15,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:15,924 INFO L124 PetriNetUnfolderBase]: 1769/2720 cut-off events. [2024-06-21 22:04:15,924 INFO L125 PetriNetUnfolderBase]: For 36235/36237 co-relation queries the response was YES. [2024-06-21 22:04:15,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13885 conditions, 2720 events. 1769/2720 cut-off events. For 36235/36237 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13187 event pairs, 465 based on Foata normal form. 22/2741 useless extension candidates. Maximal degree in co-relation 13838. Up to 2321 conditions per place. [2024-06-21 22:04:15,938 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 104 selfloop transitions, 32 changer transitions 0/139 dead transitions. [2024-06-21 22:04:15,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 1304 flow [2024-06-21 22:04:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:04:15,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-21 22:04:15,940 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 889 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:04:15,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 1304 flow [2024-06-21 22:04:15,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1275 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:15,972 INFO L231 Difference]: Finished difference. Result has 102 places, 97 transitions, 959 flow [2024-06-21 22:04:15,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=959, PETRI_PLACES=102, PETRI_TRANSITIONS=97} [2024-06-21 22:04:15,972 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-21 22:04:15,972 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 97 transitions, 959 flow [2024-06-21 22:04:15,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:15,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:15,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:15,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:04:15,973 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:15,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:15,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1432106801, now seen corresponding path program 1 times [2024-06-21 22:04:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:15,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465984618] [2024-06-21 22:04:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:15,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:16,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465984618] [2024-06-21 22:04:16,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465984618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:16,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:16,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:16,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726450928] [2024-06-21 22:04:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:16,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:16,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:16,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:16,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:16,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:16,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 97 transitions, 959 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:16,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:16,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:16,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:17,603 INFO L124 PetriNetUnfolderBase]: 1786/2747 cut-off events. [2024-06-21 22:04:17,603 INFO L125 PetriNetUnfolderBase]: For 37520/37522 co-relation queries the response was YES. [2024-06-21 22:04:17,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14386 conditions, 2747 events. 1786/2747 cut-off events. For 37520/37522 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13327 event pairs, 492 based on Foata normal form. 6/2752 useless extension candidates. Maximal degree in co-relation 14337. Up to 2590 conditions per place. [2024-06-21 22:04:17,616 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 102 selfloop transitions, 22 changer transitions 0/127 dead transitions. [2024-06-21 22:04:17,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 127 transitions, 1312 flow [2024-06-21 22:04:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:04:17,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652014652014652 [2024-06-21 22:04:17,618 INFO L175 Difference]: Start difference. First operand has 102 places, 97 transitions, 959 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:04:17,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 127 transitions, 1312 flow [2024-06-21 22:04:17,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 127 transitions, 1242 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:17,671 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 975 flow [2024-06-21 22:04:17,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=975, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2024-06-21 22:04:17,671 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 62 predicate places. [2024-06-21 22:04:17,671 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 975 flow [2024-06-21 22:04:17,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:17,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:17,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:17,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:04:17,672 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:17,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1432113311, now seen corresponding path program 2 times [2024-06-21 22:04:17,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:17,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390533499] [2024-06-21 22:04:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:18,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390533499] [2024-06-21 22:04:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390533499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:18,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:18,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:18,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921866640] [2024-06-21 22:04:18,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:18,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:18,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:18,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:18,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:18,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:19,199 INFO L124 PetriNetUnfolderBase]: 1778/2735 cut-off events. [2024-06-21 22:04:19,199 INFO L125 PetriNetUnfolderBase]: For 40210/40212 co-relation queries the response was YES. [2024-06-21 22:04:19,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14433 conditions, 2735 events. 1778/2735 cut-off events. For 40210/40212 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13284 event pairs, 486 based on Foata normal form. 6/2740 useless extension candidates. Maximal degree in co-relation 14383. Up to 2491 conditions per place. [2024-06-21 22:04:19,216 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 98 selfloop transitions, 25 changer transitions 0/126 dead transitions. [2024-06-21 22:04:19,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 126 transitions, 1320 flow [2024-06-21 22:04:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 22:04:19,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-21 22:04:19,218 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 975 flow. Second operand 7 states and 123 transitions. [2024-06-21 22:04:19,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 126 transitions, 1320 flow [2024-06-21 22:04:19,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 1255 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:19,273 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 1007 flow [2024-06-21 22:04:19,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1007, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2024-06-21 22:04:19,273 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 64 predicate places. [2024-06-21 22:04:19,274 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 1007 flow [2024-06-21 22:04:19,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:19,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:19,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:19,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:04:19,275 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:19,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash 363682955, now seen corresponding path program 3 times [2024-06-21 22:04:19,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:19,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311168984] [2024-06-21 22:04:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:19,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311168984] [2024-06-21 22:04:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311168984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:20,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:20,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773741704] [2024-06-21 22:04:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:20,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:20,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:20,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:20,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 1007 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:20,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:20,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:20,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:21,054 INFO L124 PetriNetUnfolderBase]: 1902/2932 cut-off events. [2024-06-21 22:04:21,054 INFO L125 PetriNetUnfolderBase]: For 45523/45529 co-relation queries the response was YES. [2024-06-21 22:04:21,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15858 conditions, 2932 events. 1902/2932 cut-off events. For 45523/45529 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14332 event pairs, 533 based on Foata normal form. 8/2939 useless extension candidates. Maximal degree in co-relation 15807. Up to 2727 conditions per place. [2024-06-21 22:04:21,071 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 104 selfloop transitions, 34 changer transitions 0/141 dead transitions. [2024-06-21 22:04:21,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 141 transitions, 1572 flow [2024-06-21 22:04:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:04:21,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42628205128205127 [2024-06-21 22:04:21,073 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 1007 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:04:21,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 141 transitions, 1572 flow [2024-06-21 22:04:21,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 141 transitions, 1478 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:21,147 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 1268 flow [2024-06-21 22:04:21,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1268, PETRI_PLACES=110, PETRI_TRANSITIONS=117} [2024-06-21 22:04:21,148 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-06-21 22:04:21,148 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 1268 flow [2024-06-21 22:04:21,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:21,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:21,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:21,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:04:21,149 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:21,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:21,149 INFO L85 PathProgramCache]: Analyzing trace with hash 672587213, now seen corresponding path program 4 times [2024-06-21 22:04:21,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:21,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301809780] [2024-06-21 22:04:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:21,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:22,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:22,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301809780] [2024-06-21 22:04:22,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301809780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:22,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:22,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:22,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981150196] [2024-06-21 22:04:22,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:22,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:22,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 117 transitions, 1268 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:22,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:22,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:22,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:22,636 INFO L124 PetriNetUnfolderBase]: 1919/2957 cut-off events. [2024-06-21 22:04:22,636 INFO L125 PetriNetUnfolderBase]: For 50104/50110 co-relation queries the response was YES. [2024-06-21 22:04:22,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16446 conditions, 2957 events. 1919/2957 cut-off events. For 50104/50110 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14440 event pairs, 530 based on Foata normal form. 8/2964 useless extension candidates. Maximal degree in co-relation 16391. Up to 2515 conditions per place. [2024-06-21 22:04:22,656 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 92 selfloop transitions, 48 changer transitions 0/143 dead transitions. [2024-06-21 22:04:22,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 1648 flow [2024-06-21 22:04:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 22:04:22,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542124542124542 [2024-06-21 22:04:22,658 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 1268 flow. Second operand 7 states and 124 transitions. [2024-06-21 22:04:22,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 1648 flow [2024-06-21 22:04:22,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 1583 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:22,720 INFO L231 Difference]: Finished difference. Result has 114 places, 119 transitions, 1350 flow [2024-06-21 22:04:22,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1350, PETRI_PLACES=114, PETRI_TRANSITIONS=119} [2024-06-21 22:04:22,720 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 74 predicate places. [2024-06-21 22:04:22,721 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 119 transitions, 1350 flow [2024-06-21 22:04:22,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:22,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:22,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:22,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:04:22,721 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:22,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash 371963675, now seen corresponding path program 5 times [2024-06-21 22:04:22,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:22,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745514871] [2024-06-21 22:04:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:22,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745514871] [2024-06-21 22:04:23,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745514871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:23,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107554472] [2024-06-21 22:04:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:23,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:23,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:23,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 119 transitions, 1350 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:23,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:23,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:23,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:24,302 INFO L124 PetriNetUnfolderBase]: 1911/2945 cut-off events. [2024-06-21 22:04:24,302 INFO L125 PetriNetUnfolderBase]: For 54280/54286 co-relation queries the response was YES. [2024-06-21 22:04:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16663 conditions, 2945 events. 1911/2945 cut-off events. For 54280/54286 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14310 event pairs, 576 based on Foata normal form. 8/2952 useless extension candidates. Maximal degree in co-relation 16606. Up to 2841 conditions per place. [2024-06-21 22:04:24,319 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 123 selfloop transitions, 16 changer transitions 0/142 dead transitions. [2024-06-21 22:04:24,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 142 transitions, 1720 flow [2024-06-21 22:04:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 22:04:24,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:04:24,321 INFO L175 Difference]: Start difference. First operand has 114 places, 119 transitions, 1350 flow. Second operand 7 states and 117 transitions. [2024-06-21 22:04:24,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 142 transitions, 1720 flow [2024-06-21 22:04:24,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 142 transitions, 1603 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:24,391 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 1316 flow [2024-06-21 22:04:24,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1316, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-06-21 22:04:24,392 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 76 predicate places. [2024-06-21 22:04:24,392 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 1316 flow [2024-06-21 22:04:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:24,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:24,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:24,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:04:24,393 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)] === [2024-06-21 22:04:24,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:24,393 INFO L85 PathProgramCache]: Analyzing trace with hash -504269083, now seen corresponding path program 1 times [2024-06-21 22:04:24,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:24,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474578881] [2024-06-21 22:04:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:24,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:24,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:24,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474578881] [2024-06-21 22:04:24,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474578881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:24,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:24,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:04:24,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962211337] [2024-06-21 22:04:24,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:24,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:04:24,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:04:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:04:24,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:24,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 1316 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) [2024-06-21 22:04:24,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:24,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:24,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:25,555 INFO L124 PetriNetUnfolderBase]: 1941/2985 cut-off events. [2024-06-21 22:04:25,555 INFO L125 PetriNetUnfolderBase]: For 58120/58120 co-relation queries the response was YES. [2024-06-21 22:04:25,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16823 conditions, 2985 events. 1941/2985 cut-off events. For 58120/58120 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14535 event pairs, 590 based on Foata normal form. 6/2990 useless extension candidates. Maximal degree in co-relation 16765. Up to 2875 conditions per place. [2024-06-21 22:04:25,573 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 122 selfloop transitions, 21 changer transitions 0/146 dead transitions. [2024-06-21 22:04:25,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 146 transitions, 1748 flow [2024-06-21 22:04:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:04:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:04:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 22:04:25,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45726495726495725 [2024-06-21 22:04:25,575 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 1316 flow. Second operand 6 states and 107 transitions. [2024-06-21 22:04:25,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 146 transitions, 1748 flow [2024-06-21 22:04:25,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 146 transitions, 1683 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:25,653 INFO L231 Difference]: Finished difference. Result has 117 places, 127 transitions, 1354 flow [2024-06-21 22:04:25,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1354, PETRI_PLACES=117, PETRI_TRANSITIONS=127} [2024-06-21 22:04:25,654 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 77 predicate places. [2024-06-21 22:04:25,654 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 127 transitions, 1354 flow [2024-06-21 22:04:25,654 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) [2024-06-21 22:04:25,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:25,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:25,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:04:25,655 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)] === [2024-06-21 22:04:25,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash 694933575, now seen corresponding path program 2 times [2024-06-21 22:04:25,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:25,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402935606] [2024-06-21 22:04:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:25,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:26,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:26,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402935606] [2024-06-21 22:04:26,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402935606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:26,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:26,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:04:26,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797118470] [2024-06-21 22:04:26,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:04:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:26,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:04:26,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:04:26,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:26,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 127 transitions, 1354 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) [2024-06-21 22:04:26,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:26,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:26,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:26,793 INFO L124 PetriNetUnfolderBase]: 1923/2961 cut-off events. [2024-06-21 22:04:26,793 INFO L125 PetriNetUnfolderBase]: For 60435/60435 co-relation queries the response was YES. [2024-06-21 22:04:26,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16935 conditions, 2961 events. 1923/2961 cut-off events. For 60435/60435 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14401 event pairs, 587 based on Foata normal form. 6/2966 useless extension candidates. Maximal degree in co-relation 16876. Up to 2888 conditions per place. [2024-06-21 22:04:26,812 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 120 selfloop transitions, 18 changer transitions 0/141 dead transitions. [2024-06-21 22:04:26,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 141 transitions, 1668 flow [2024-06-21 22:04:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:04:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:04:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 22:04:26,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 22:04:26,821 INFO L175 Difference]: Start difference. First operand has 117 places, 127 transitions, 1354 flow. Second operand 5 states and 91 transitions. [2024-06-21 22:04:26,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 141 transitions, 1668 flow [2024-06-21 22:04:26,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 1631 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 22:04:26,889 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 1366 flow [2024-06-21 22:04:26,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1366, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2024-06-21 22:04:26,890 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 80 predicate places. [2024-06-21 22:04:26,890 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 1366 flow [2024-06-21 22:04:26,890 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) [2024-06-21 22:04:26,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:26,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:26,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:04:26,890 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:26,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1053653288, now seen corresponding path program 1 times [2024-06-21 22:04:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572338207] [2024-06-21 22:04:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:28,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:28,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572338207] [2024-06-21 22:04:28,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572338207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:28,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:28,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264063940] [2024-06-21 22:04:28,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:28,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:28,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:28,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:28,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:28,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 1366 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 22:04:28,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:28,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:28,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:28,683 INFO L124 PetriNetUnfolderBase]: 1964/3031 cut-off events. [2024-06-21 22:04:28,683 INFO L125 PetriNetUnfolderBase]: For 66361/66371 co-relation queries the response was YES. [2024-06-21 22:04:28,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17385 conditions, 3031 events. 1964/3031 cut-off events. For 66361/66371 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14961 event pairs, 513 based on Foata normal form. 20/3050 useless extension candidates. Maximal degree in co-relation 17324. Up to 2696 conditions per place. [2024-06-21 22:04:28,748 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 123 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-21 22:04:28,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 162 transitions, 1807 flow [2024-06-21 22:04:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 22:04:28,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 22:04:28,752 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 1366 flow. Second operand 8 states and 143 transitions. [2024-06-21 22:04:28,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 162 transitions, 1807 flow [2024-06-21 22:04:28,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 162 transitions, 1771 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:28,828 INFO L231 Difference]: Finished difference. Result has 124 places, 128 transitions, 1438 flow [2024-06-21 22:04:28,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2024-06-21 22:04:28,828 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 84 predicate places. [2024-06-21 22:04:28,828 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 1438 flow [2024-06-21 22:04:28,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 22:04:28,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:28,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:04:28,829 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:28,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1048089098, now seen corresponding path program 2 times [2024-06-21 22:04:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:28,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292934521] [2024-06-21 22:04:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:28,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292934521] [2024-06-21 22:04:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292934521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:30,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:30,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:30,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180137235] [2024-06-21 22:04:30,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:30,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:30,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:30,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 1438 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 22:04:30,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:30,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:30,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:30,790 INFO L124 PetriNetUnfolderBase]: 1944/3001 cut-off events. [2024-06-21 22:04:30,791 INFO L125 PetriNetUnfolderBase]: For 68437/68439 co-relation queries the response was YES. [2024-06-21 22:04:30,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17299 conditions, 3001 events. 1944/3001 cut-off events. For 68437/68439 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14801 event pairs, 509 based on Foata normal form. 14/3014 useless extension candidates. Maximal degree in co-relation 17237. Up to 2577 conditions per place. [2024-06-21 22:04:30,809 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 120 selfloop transitions, 36 changer transitions 0/159 dead transitions. [2024-06-21 22:04:30,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 159 transitions, 1834 flow [2024-06-21 22:04:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:04:30,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 22:04:30,810 INFO L175 Difference]: Start difference. First operand has 124 places, 128 transitions, 1438 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:04:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 159 transitions, 1834 flow [2024-06-21 22:04:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 159 transitions, 1741 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:30,892 INFO L231 Difference]: Finished difference. Result has 126 places, 128 transitions, 1423 flow [2024-06-21 22:04:30,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1423, PETRI_PLACES=126, PETRI_TRANSITIONS=128} [2024-06-21 22:04:30,893 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 86 predicate places. [2024-06-21 22:04:30,893 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 128 transitions, 1423 flow [2024-06-21 22:04:30,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 22:04:30,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:30,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:30,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:04:30,894 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)] === [2024-06-21 22:04:30,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1334541599, now seen corresponding path program 1 times [2024-06-21 22:04:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479846128] [2024-06-21 22:04:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:30,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479846128] [2024-06-21 22:04:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479846128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:31,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:31,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459725900] [2024-06-21 22:04:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:31,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:31,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:31,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:31,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:31,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:31,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 128 transitions, 1423 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) [2024-06-21 22:04:31,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:31,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:31,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:32,097 INFO L124 PetriNetUnfolderBase]: 2133/3260 cut-off events. [2024-06-21 22:04:32,097 INFO L125 PetriNetUnfolderBase]: For 77594/77604 co-relation queries the response was YES. [2024-06-21 22:04:32,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19212 conditions, 3260 events. 2133/3260 cut-off events. For 77594/77604 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16172 event pairs, 543 based on Foata normal form. 17/3276 useless extension candidates. Maximal degree in co-relation 19149. Up to 2799 conditions per place. [2024-06-21 22:04:32,121 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 129 selfloop transitions, 44 changer transitions 0/176 dead transitions. [2024-06-21 22:04:32,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 176 transitions, 2139 flow [2024-06-21 22:04:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 22:04:32,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-06-21 22:04:32,130 INFO L175 Difference]: Start difference. First operand has 126 places, 128 transitions, 1423 flow. Second operand 7 states and 136 transitions. [2024-06-21 22:04:32,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 176 transitions, 2139 flow [2024-06-21 22:04:32,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 176 transitions, 2051 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:32,246 INFO L231 Difference]: Finished difference. Result has 129 places, 144 transitions, 1656 flow [2024-06-21 22:04:32,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1656, PETRI_PLACES=129, PETRI_TRANSITIONS=144} [2024-06-21 22:04:32,247 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 89 predicate places. [2024-06-21 22:04:32,247 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 144 transitions, 1656 flow [2024-06-21 22:04:32,247 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) [2024-06-21 22:04:32,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:32,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:32,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:04:32,248 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:32,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1334272829, now seen corresponding path program 2 times [2024-06-21 22:04:32,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:32,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721475997] [2024-06-21 22:04:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:32,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721475997] [2024-06-21 22:04:32,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721475997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:32,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:32,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313083652] [2024-06-21 22:04:32,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:32,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:32,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:32,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:32,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 1656 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) [2024-06-21 22:04:32,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:32,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:32,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:33,490 INFO L124 PetriNetUnfolderBase]: 2301/3489 cut-off events. [2024-06-21 22:04:33,490 INFO L125 PetriNetUnfolderBase]: For 90121/90129 co-relation queries the response was YES. [2024-06-21 22:04:33,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22117 conditions, 3489 events. 2301/3489 cut-off events. For 90121/90129 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17316 event pairs, 607 based on Foata normal form. 15/3503 useless extension candidates. Maximal degree in co-relation 22051. Up to 3296 conditions per place. [2024-06-21 22:04:33,514 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 152 selfloop transitions, 27 changer transitions 0/182 dead transitions. [2024-06-21 22:04:33,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 2299 flow [2024-06-21 22:04:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:04:33,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 22:04:33,516 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 1656 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:04:33,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 2299 flow [2024-06-21 22:04:33,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 182 transitions, 2221 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-21 22:04:33,696 INFO L231 Difference]: Finished difference. Result has 137 places, 155 transitions, 1805 flow [2024-06-21 22:04:33,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1805, PETRI_PLACES=137, PETRI_TRANSITIONS=155} [2024-06-21 22:04:33,696 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 97 predicate places. [2024-06-21 22:04:33,697 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 155 transitions, 1805 flow [2024-06-21 22:04:33,697 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) [2024-06-21 22:04:33,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:33,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:33,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:04:33,697 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:33,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:33,698 INFO L85 PathProgramCache]: Analyzing trace with hash 131982982, now seen corresponding path program 3 times [2024-06-21 22:04:33,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:33,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049457975] [2024-06-21 22:04:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:33,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:34,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:34,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049457975] [2024-06-21 22:04:34,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049457975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:34,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:34,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:34,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948757308] [2024-06-21 22:04:34,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:34,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:34,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:34,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:34,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 155 transitions, 1805 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:34,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:34,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:35,507 INFO L124 PetriNetUnfolderBase]: 2342/3566 cut-off events. [2024-06-21 22:04:35,507 INFO L125 PetriNetUnfolderBase]: For 91389/91403 co-relation queries the response was YES. [2024-06-21 22:04:35,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22357 conditions, 3566 events. 2342/3566 cut-off events. For 91389/91403 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17913 event pairs, 596 based on Foata normal form. 22/3587 useless extension candidates. Maximal degree in co-relation 22287. Up to 3116 conditions per place. [2024-06-21 22:04:35,532 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 140 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-21 22:04:35,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 190 transitions, 2305 flow [2024-06-21 22:04:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:04:35,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 22:04:35,533 INFO L175 Difference]: Start difference. First operand has 137 places, 155 transitions, 1805 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:04:35,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 190 transitions, 2305 flow [2024-06-21 22:04:35,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 2213 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:35,683 INFO L231 Difference]: Finished difference. Result has 141 places, 156 transitions, 1844 flow [2024-06-21 22:04:35,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1844, PETRI_PLACES=141, PETRI_TRANSITIONS=156} [2024-06-21 22:04:35,683 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 101 predicate places. [2024-06-21 22:04:35,683 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 156 transitions, 1844 flow [2024-06-21 22:04:35,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:35,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:35,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:04:35,684 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:35,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1657504336, now seen corresponding path program 4 times [2024-06-21 22:04:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:35,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901259622] [2024-06-21 22:04:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901259622] [2024-06-21 22:04:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901259622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:36,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94063953] [2024-06-21 22:04:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:36,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:36,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 156 transitions, 1844 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:36,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:36,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:36,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:37,406 INFO L124 PetriNetUnfolderBase]: 2383/3639 cut-off events. [2024-06-21 22:04:37,406 INFO L125 PetriNetUnfolderBase]: For 98726/98732 co-relation queries the response was YES. [2024-06-21 22:04:37,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22699 conditions, 3639 events. 2383/3639 cut-off events. For 98726/98732 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18506 event pairs, 609 based on Foata normal form. 16/3654 useless extension candidates. Maximal degree in co-relation 22628. Up to 3059 conditions per place. [2024-06-21 22:04:37,427 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 135 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2024-06-21 22:04:37,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 188 transitions, 2328 flow [2024-06-21 22:04:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:04:37,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 22:04:37,428 INFO L175 Difference]: Start difference. First operand has 141 places, 156 transitions, 1844 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:04:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 188 transitions, 2328 flow [2024-06-21 22:04:37,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 188 transitions, 2204 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 22:04:37,563 INFO L231 Difference]: Finished difference. Result has 141 places, 157 transitions, 1858 flow [2024-06-21 22:04:37,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1858, PETRI_PLACES=141, PETRI_TRANSITIONS=157} [2024-06-21 22:04:37,564 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 101 predicate places. [2024-06-21 22:04:37,564 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 157 transitions, 1858 flow [2024-06-21 22:04:37,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:37,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:37,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:37,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:04:37,565 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:37,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash -617481866, now seen corresponding path program 5 times [2024-06-21 22:04:37,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:37,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012203920] [2024-06-21 22:04:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:37,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:38,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:38,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012203920] [2024-06-21 22:04:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012203920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:38,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:38,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:04:38,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500943294] [2024-06-21 22:04:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:38,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:04:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:38,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:04:38,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:04:38,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:38,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 157 transitions, 1858 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 22:04:38,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:38,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:38,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:39,318 INFO L124 PetriNetUnfolderBase]: 2363/3607 cut-off events. [2024-06-21 22:04:39,318 INFO L125 PetriNetUnfolderBase]: For 88249/88255 co-relation queries the response was YES. [2024-06-21 22:04:39,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21994 conditions, 3607 events. 2363/3607 cut-off events. For 88249/88255 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18249 event pairs, 682 based on Foata normal form. 16/3622 useless extension candidates. Maximal degree in co-relation 21924. Up to 3434 conditions per place. [2024-06-21 22:04:39,346 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 164 selfloop transitions, 17 changer transitions 0/184 dead transitions. [2024-06-21 22:04:39,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 184 transitions, 2242 flow [2024-06-21 22:04:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:04:39,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-21 22:04:39,347 INFO L175 Difference]: Start difference. First operand has 141 places, 157 transitions, 1858 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:04:39,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 184 transitions, 2242 flow [2024-06-21 22:04:39,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 184 transitions, 2112 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 22:04:39,502 INFO L231 Difference]: Finished difference. Result has 140 places, 156 transitions, 1716 flow [2024-06-21 22:04:39,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1716, PETRI_PLACES=140, PETRI_TRANSITIONS=156} [2024-06-21 22:04:39,502 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 100 predicate places. [2024-06-21 22:04:39,502 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 156 transitions, 1716 flow [2024-06-21 22:04:39,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-21 22:04:39,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:39,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:39,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:04:39,503 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:39,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:39,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1811899495, now seen corresponding path program 3 times [2024-06-21 22:04:39,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:39,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737592328] [2024-06-21 22:04:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:39,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:40,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:40,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737592328] [2024-06-21 22:04:40,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737592328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:40,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:40,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:40,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620336733] [2024-06-21 22:04:40,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:40,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:40,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:40,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:40,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:40,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:40,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 156 transitions, 1716 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) [2024-06-21 22:04:40,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:40,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:40,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:40,777 INFO L124 PetriNetUnfolderBase]: 2492/3783 cut-off events. [2024-06-21 22:04:40,777 INFO L125 PetriNetUnfolderBase]: For 84918/84926 co-relation queries the response was YES. [2024-06-21 22:04:40,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22810 conditions, 3783 events. 2492/3783 cut-off events. For 84918/84926 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19241 event pairs, 638 based on Foata normal form. 15/3797 useless extension candidates. Maximal degree in co-relation 22741. Up to 3411 conditions per place. [2024-06-21 22:04:40,805 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 146 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-06-21 22:04:40,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 196 transitions, 2370 flow [2024-06-21 22:04:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 22:04:40,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 22:04:40,807 INFO L175 Difference]: Start difference. First operand has 140 places, 156 transitions, 1716 flow. Second operand 7 states and 133 transitions. [2024-06-21 22:04:40,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 196 transitions, 2370 flow [2024-06-21 22:04:40,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 196 transitions, 2312 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:40,965 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1946 flow [2024-06-21 22:04:40,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1946, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-21 22:04:40,966 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 103 predicate places. [2024-06-21 22:04:40,966 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1946 flow [2024-06-21 22:04:40,967 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) [2024-06-21 22:04:40,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:40,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:40,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:04:40,967 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:40,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash 68307114, now seen corresponding path program 1 times [2024-06-21 22:04:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:40,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890580373] [2024-06-21 22:04:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:40,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:41,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:41,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890580373] [2024-06-21 22:04:41,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890580373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:41,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:41,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:41,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020046797] [2024-06-21 22:04:41,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:41,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:41,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:41,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:41,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1946 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) [2024-06-21 22:04:41,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:41,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:41,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:42,306 INFO L124 PetriNetUnfolderBase]: 2486/3771 cut-off events. [2024-06-21 22:04:42,306 INFO L125 PetriNetUnfolderBase]: For 87339/87347 co-relation queries the response was YES. [2024-06-21 22:04:42,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23415 conditions, 3771 events. 2486/3771 cut-off events. For 87339/87347 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19072 event pairs, 640 based on Foata normal form. 8/3778 useless extension candidates. Maximal degree in co-relation 23343. Up to 3700 conditions per place. [2024-06-21 22:04:42,336 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 159 selfloop transitions, 22 changer transitions 0/184 dead transitions. [2024-06-21 22:04:42,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 184 transitions, 2394 flow [2024-06-21 22:04:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:04:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:04:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 22:04:42,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717948717948718 [2024-06-21 22:04:42,337 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1946 flow. Second operand 5 states and 92 transitions. [2024-06-21 22:04:42,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 184 transitions, 2394 flow [2024-06-21 22:04:42,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 184 transitions, 2316 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:42,456 INFO L231 Difference]: Finished difference. Result has 145 places, 168 transitions, 1976 flow [2024-06-21 22:04:42,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1976, PETRI_PLACES=145, PETRI_TRANSITIONS=168} [2024-06-21 22:04:42,457 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 105 predicate places. [2024-06-21 22:04:42,457 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 168 transitions, 1976 flow [2024-06-21 22:04:42,457 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) [2024-06-21 22:04:42,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:42,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:42,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:04:42,458 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:04:42,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash 68321002, now seen corresponding path program 1 times [2024-06-21 22:04:42,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:42,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822453781] [2024-06-21 22:04:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:43,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:43,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822453781] [2024-06-21 22:04:43,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822453781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:43,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:43,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:43,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444586139] [2024-06-21 22:04:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:43,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:43,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:43,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:43,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 168 transitions, 1976 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:43,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:43,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:43,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:44,259 INFO L124 PetriNetUnfolderBase]: 2481/3770 cut-off events. [2024-06-21 22:04:44,259 INFO L125 PetriNetUnfolderBase]: For 92045/92045 co-relation queries the response was YES. [2024-06-21 22:04:44,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23362 conditions, 3770 events. 2481/3770 cut-off events. For 92045/92045 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19064 event pairs, 757 based on Foata normal form. 2/3771 useless extension candidates. Maximal degree in co-relation 23289. Up to 3735 conditions per place. [2024-06-21 22:04:44,287 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 164 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2024-06-21 22:04:44,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 179 transitions, 2376 flow [2024-06-21 22:04:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:04:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:04:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 22:04:44,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256410256410256 [2024-06-21 22:04:44,288 INFO L175 Difference]: Start difference. First operand has 145 places, 168 transitions, 1976 flow. Second operand 5 states and 83 transitions. [2024-06-21 22:04:44,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 179 transitions, 2376 flow [2024-06-21 22:04:44,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 179 transitions, 2330 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:44,408 INFO L231 Difference]: Finished difference. Result has 147 places, 170 transitions, 1989 flow [2024-06-21 22:04:44,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1989, PETRI_PLACES=147, PETRI_TRANSITIONS=170} [2024-06-21 22:04:44,408 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 107 predicate places. [2024-06-21 22:04:44,409 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 170 transitions, 1989 flow [2024-06-21 22:04:44,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:44,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:44,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:44,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:04:44,409 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)] === [2024-06-21 22:04:44,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1582458650, now seen corresponding path program 1 times [2024-06-21 22:04:44,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:44,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56096191] [2024-06-21 22:04:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:44,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:44,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56096191] [2024-06-21 22:04:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56096191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:45,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:45,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295746998] [2024-06-21 22:04:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:45,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:45,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:45,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:45,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 170 transitions, 1989 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) [2024-06-21 22:04:45,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:45,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:45,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:45,680 INFO L124 PetriNetUnfolderBase]: 2589/3919 cut-off events. [2024-06-21 22:04:45,680 INFO L125 PetriNetUnfolderBase]: For 107611/107613 co-relation queries the response was YES. [2024-06-21 22:04:45,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24764 conditions, 3919 events. 2589/3919 cut-off events. For 107611/107613 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19893 event pairs, 602 based on Foata normal form. 14/3932 useless extension candidates. Maximal degree in co-relation 24690. Up to 3109 conditions per place. [2024-06-21 22:04:45,712 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 137 selfloop transitions, 68 changer transitions 0/208 dead transitions. [2024-06-21 22:04:45,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 208 transitions, 2756 flow [2024-06-21 22:04:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 22:04:45,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 22:04:45,713 INFO L175 Difference]: Start difference. First operand has 147 places, 170 transitions, 1989 flow. Second operand 7 states and 132 transitions. [2024-06-21 22:04:45,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 208 transitions, 2756 flow [2024-06-21 22:04:45,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 208 transitions, 2713 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:45,847 INFO L231 Difference]: Finished difference. Result has 152 places, 179 transitions, 2264 flow [2024-06-21 22:04:45,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2264, PETRI_PLACES=152, PETRI_TRANSITIONS=179} [2024-06-21 22:04:45,848 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 112 predicate places. [2024-06-21 22:04:45,848 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 179 transitions, 2264 flow [2024-06-21 22:04:45,848 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) [2024-06-21 22:04:45,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:45,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:45,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:04:45,849 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)] === [2024-06-21 22:04:45,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1811344636, now seen corresponding path program 2 times [2024-06-21 22:04:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258200929] [2024-06-21 22:04:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:46,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:46,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258200929] [2024-06-21 22:04:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258200929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:46,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:46,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105577981] [2024-06-21 22:04:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:46,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:46,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:46,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 179 transitions, 2264 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) [2024-06-21 22:04:46,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:46,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:46,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:47,220 INFO L124 PetriNetUnfolderBase]: 2541/3848 cut-off events. [2024-06-21 22:04:47,220 INFO L125 PetriNetUnfolderBase]: For 107982/107990 co-relation queries the response was YES. [2024-06-21 22:04:47,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25038 conditions, 3848 events. 2541/3848 cut-off events. For 107982/107990 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19489 event pairs, 664 based on Foata normal form. 18/3865 useless extension candidates. Maximal degree in co-relation 24962. Up to 3694 conditions per place. [2024-06-21 22:04:47,252 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 175 selfloop transitions, 27 changer transitions 0/205 dead transitions. [2024-06-21 22:04:47,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 205 transitions, 2754 flow [2024-06-21 22:04:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:04:47,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 22:04:47,253 INFO L175 Difference]: Start difference. First operand has 152 places, 179 transitions, 2264 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:04:47,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 205 transitions, 2754 flow [2024-06-21 22:04:47,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 205 transitions, 2621 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 22:04:47,438 INFO L231 Difference]: Finished difference. Result has 157 places, 179 transitions, 2193 flow [2024-06-21 22:04:47,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2193, PETRI_PLACES=157, PETRI_TRANSITIONS=179} [2024-06-21 22:04:47,438 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-06-21 22:04:47,438 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 179 transitions, 2193 flow [2024-06-21 22:04:47,438 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) [2024-06-21 22:04:47,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:47,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:47,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:04:47,439 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)] === [2024-06-21 22:04:47,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1819919484, now seen corresponding path program 1 times [2024-06-21 22:04:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:47,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213857301] [2024-06-21 22:04:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:47,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:48,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:48,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213857301] [2024-06-21 22:04:48,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213857301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:48,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:48,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:48,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106168693] [2024-06-21 22:04:48,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:48,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:48,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:48,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:48,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 179 transitions, 2193 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:48,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:48,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:48,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:49,166 INFO L124 PetriNetUnfolderBase]: 2650/4004 cut-off events. [2024-06-21 22:04:49,166 INFO L125 PetriNetUnfolderBase]: For 115876/115886 co-relation queries the response was YES. [2024-06-21 22:04:49,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25529 conditions, 4004 events. 2650/4004 cut-off events. For 115876/115886 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20385 event pairs, 623 based on Foata normal form. 17/4020 useless extension candidates. Maximal degree in co-relation 25452. Up to 3038 conditions per place. [2024-06-21 22:04:49,193 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 145 selfloop transitions, 86 changer transitions 0/234 dead transitions. [2024-06-21 22:04:49,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 234 transitions, 3099 flow [2024-06-21 22:04:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:49,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:49,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 22:04:49,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985754985754986 [2024-06-21 22:04:49,195 INFO L175 Difference]: Start difference. First operand has 157 places, 179 transitions, 2193 flow. Second operand 9 states and 175 transitions. [2024-06-21 22:04:49,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 234 transitions, 3099 flow [2024-06-21 22:04:49,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 234 transitions, 3045 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:49,367 INFO L231 Difference]: Finished difference. Result has 160 places, 189 transitions, 2454 flow [2024-06-21 22:04:49,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2454, PETRI_PLACES=160, PETRI_TRANSITIONS=189} [2024-06-21 22:04:49,367 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 120 predicate places. [2024-06-21 22:04:49,367 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 189 transitions, 2454 flow [2024-06-21 22:04:49,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:49,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:49,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:49,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:04:49,368 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)] === [2024-06-21 22:04:49,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:49,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1587216282, now seen corresponding path program 2 times [2024-06-21 22:04:49,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:49,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126787781] [2024-06-21 22:04:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:49,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:50,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:50,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126787781] [2024-06-21 22:04:50,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126787781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:50,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:50,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:50,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683403061] [2024-06-21 22:04:50,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:50,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:50,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:50,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:50,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 189 transitions, 2454 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:50,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:50,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:50,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:50,964 INFO L124 PetriNetUnfolderBase]: 2665/4020 cut-off events. [2024-06-21 22:04:50,964 INFO L125 PetriNetUnfolderBase]: For 122680/122688 co-relation queries the response was YES. [2024-06-21 22:04:50,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27267 conditions, 4020 events. 2665/4020 cut-off events. For 122680/122688 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20421 event pairs, 711 based on Foata normal form. 9/4028 useless extension candidates. Maximal degree in co-relation 27188. Up to 3941 conditions per place. [2024-06-21 22:04:50,996 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 193 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2024-06-21 22:04:50,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 227 transitions, 3184 flow [2024-06-21 22:04:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:04:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:04:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:04:50,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045584045584046 [2024-06-21 22:04:50,998 INFO L175 Difference]: Start difference. First operand has 160 places, 189 transitions, 2454 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:04:50,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 227 transitions, 3184 flow [2024-06-21 22:04:51,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 227 transitions, 3045 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 22:04:51,167 INFO L231 Difference]: Finished difference. Result has 169 places, 207 transitions, 2662 flow [2024-06-21 22:04:51,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2662, PETRI_PLACES=169, PETRI_TRANSITIONS=207} [2024-06-21 22:04:51,167 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 129 predicate places. [2024-06-21 22:04:51,168 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 207 transitions, 2662 flow [2024-06-21 22:04:51,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:51,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:51,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:51,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:04:51,168 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)] === [2024-06-21 22:04:51,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash 226619264, now seen corresponding path program 3 times [2024-06-21 22:04:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:51,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314355236] [2024-06-21 22:04:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:51,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:51,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:51,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314355236] [2024-06-21 22:04:51,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314355236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:51,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:51,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:51,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498095715] [2024-06-21 22:04:51,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:51,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:51,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:51,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:51,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 207 transitions, 2662 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) [2024-06-21 22:04:51,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:51,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:51,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:52,480 INFO L124 PetriNetUnfolderBase]: 2695/4068 cut-off events. [2024-06-21 22:04:52,480 INFO L125 PetriNetUnfolderBase]: For 130429/130429 co-relation queries the response was YES. [2024-06-21 22:04:52,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27951 conditions, 4068 events. 2695/4068 cut-off events. For 130429/130429 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20752 event pairs, 750 based on Foata normal form. 6/4073 useless extension candidates. Maximal degree in co-relation 27866. Up to 3918 conditions per place. [2024-06-21 22:04:52,514 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 201 selfloop transitions, 28 changer transitions 0/232 dead transitions. [2024-06-21 22:04:52,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 232 transitions, 3324 flow [2024-06-21 22:04:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:04:52,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-21 22:04:52,515 INFO L175 Difference]: Start difference. First operand has 169 places, 207 transitions, 2662 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:04:52,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 232 transitions, 3324 flow [2024-06-21 22:04:52,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 232 transitions, 3265 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 22:04:52,725 INFO L231 Difference]: Finished difference. Result has 174 places, 210 transitions, 2721 flow [2024-06-21 22:04:52,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2721, PETRI_PLACES=174, PETRI_TRANSITIONS=210} [2024-06-21 22:04:52,726 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 22:04:52,726 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 210 transitions, 2721 flow [2024-06-21 22:04:52,726 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) [2024-06-21 22:04:52,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:52,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:04:52,727 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)] === [2024-06-21 22:04:52,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash 233942898, now seen corresponding path program 4 times [2024-06-21 22:04:52,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:52,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743082205] [2024-06-21 22:04:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:52,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743082205] [2024-06-21 22:04:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743082205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:53,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:53,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:53,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810829026] [2024-06-21 22:04:53,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:53,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:53,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:53,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:53,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:53,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 210 transitions, 2721 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) [2024-06-21 22:04:53,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:53,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:53,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:54,073 INFO L124 PetriNetUnfolderBase]: 2677/4044 cut-off events. [2024-06-21 22:04:54,074 INFO L125 PetriNetUnfolderBase]: For 132552/132552 co-relation queries the response was YES. [2024-06-21 22:04:54,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27817 conditions, 4044 events. 2677/4044 cut-off events. For 132552/132552 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20631 event pairs, 758 based on Foata normal form. 6/4049 useless extension candidates. Maximal degree in co-relation 27730. Up to 3984 conditions per place. [2024-06-21 22:04:54,107 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 202 selfloop transitions, 20 changer transitions 0/225 dead transitions. [2024-06-21 22:04:54,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 225 transitions, 3215 flow [2024-06-21 22:04:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 22:04:54,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 22:04:54,109 INFO L175 Difference]: Start difference. First operand has 174 places, 210 transitions, 2721 flow. Second operand 7 states and 112 transitions. [2024-06-21 22:04:54,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 225 transitions, 3215 flow [2024-06-21 22:04:54,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 225 transitions, 2988 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:54,342 INFO L231 Difference]: Finished difference. Result has 174 places, 210 transitions, 2540 flow [2024-06-21 22:04:54,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2494, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2540, PETRI_PLACES=174, PETRI_TRANSITIONS=210} [2024-06-21 22:04:54,343 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2024-06-21 22:04:54,343 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 210 transitions, 2540 flow [2024-06-21 22:04:54,343 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) [2024-06-21 22:04:54,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:54,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:04:54,344 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)] === [2024-06-21 22:04:54,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2105550502, now seen corresponding path program 5 times [2024-06-21 22:04:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:54,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486424824] [2024-06-21 22:04:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:54,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:54,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:54,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486424824] [2024-06-21 22:04:54,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486424824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:54,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:54,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:54,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716178202] [2024-06-21 22:04:54,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:54,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:54,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:54,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:54,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:54,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:54,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 210 transitions, 2540 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:54,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:54,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:54,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:55,688 INFO L124 PetriNetUnfolderBase]: 2641/3994 cut-off events. [2024-06-21 22:04:55,688 INFO L125 PetriNetUnfolderBase]: For 130440/130440 co-relation queries the response was YES. [2024-06-21 22:04:55,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26660 conditions, 3994 events. 2641/3994 cut-off events. For 130440/130440 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20357 event pairs, 616 based on Foata normal form. 12/4005 useless extension candidates. Maximal degree in co-relation 26574. Up to 3603 conditions per place. [2024-06-21 22:04:55,721 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 187 selfloop transitions, 48 changer transitions 0/238 dead transitions. [2024-06-21 22:04:55,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 238 transitions, 3180 flow [2024-06-21 22:04:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:04:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:04:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 22:04:55,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 22:04:55,722 INFO L175 Difference]: Start difference. First operand has 174 places, 210 transitions, 2540 flow. Second operand 7 states and 130 transitions. [2024-06-21 22:04:55,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 238 transitions, 3180 flow [2024-06-21 22:04:55,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 238 transitions, 3092 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 22:04:55,939 INFO L231 Difference]: Finished difference. Result has 175 places, 210 transitions, 2568 flow [2024-06-21 22:04:55,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2568, PETRI_PLACES=175, PETRI_TRANSITIONS=210} [2024-06-21 22:04:55,939 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-06-21 22:04:55,939 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 210 transitions, 2568 flow [2024-06-21 22:04:55,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:55,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:55,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:55,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:04:55,940 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)] === [2024-06-21 22:04:55,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1324828344, now seen corresponding path program 6 times [2024-06-21 22:04:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:55,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127307917] [2024-06-21 22:04:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:55,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127307917] [2024-06-21 22:04:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127307917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:56,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:56,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:04:56,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256896876] [2024-06-21 22:04:56,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:56,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:04:56,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:04:56,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:04:56,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:56,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 210 transitions, 2568 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) [2024-06-21 22:04:56,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:56,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:56,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:57,194 INFO L124 PetriNetUnfolderBase]: 2611/3954 cut-off events. [2024-06-21 22:04:57,195 INFO L125 PetriNetUnfolderBase]: For 129274/129274 co-relation queries the response was YES. [2024-06-21 22:04:57,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26524 conditions, 3954 events. 2611/3954 cut-off events. For 129274/129274 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20173 event pairs, 726 based on Foata normal form. 6/3959 useless extension candidates. Maximal degree in co-relation 26438. Up to 3879 conditions per place. [2024-06-21 22:04:57,225 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 204 selfloop transitions, 20 changer transitions 0/227 dead transitions. [2024-06-21 22:04:57,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 227 transitions, 3072 flow [2024-06-21 22:04:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:04:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:04:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 22:04:57,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:04:57,226 INFO L175 Difference]: Start difference. First operand has 175 places, 210 transitions, 2568 flow. Second operand 6 states and 104 transitions. [2024-06-21 22:04:57,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 227 transitions, 3072 flow [2024-06-21 22:04:57,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 227 transitions, 2977 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:04:57,465 INFO L231 Difference]: Finished difference. Result has 176 places, 210 transitions, 2523 flow [2024-06-21 22:04:57,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2523, PETRI_PLACES=176, PETRI_TRANSITIONS=210} [2024-06-21 22:04:57,466 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2024-06-21 22:04:57,466 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 210 transitions, 2523 flow [2024-06-21 22:04:57,466 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) [2024-06-21 22:04:57,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:57,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:57,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:04:57,467 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)] === [2024-06-21 22:04:57,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:57,467 INFO L85 PathProgramCache]: Analyzing trace with hash -541043366, now seen corresponding path program 3 times [2024-06-21 22:04:57,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:57,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456993666] [2024-06-21 22:04:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:57,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:58,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:58,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456993666] [2024-06-21 22:04:58,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456993666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:58,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:58,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398519348] [2024-06-21 22:04:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:58,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:04:58,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:04:58,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 210 transitions, 2523 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:58,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:58,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:04:58,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:04:59,016 INFO L124 PetriNetUnfolderBase]: 2641/3994 cut-off events. [2024-06-21 22:04:59,017 INFO L125 PetriNetUnfolderBase]: For 127081/127089 co-relation queries the response was YES. [2024-06-21 22:04:59,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26474 conditions, 3994 events. 2641/3994 cut-off events. For 127081/127089 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20427 event pairs, 598 based on Foata normal form. 10/4003 useless extension candidates. Maximal degree in co-relation 26388. Up to 3616 conditions per place. [2024-06-21 22:04:59,047 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 190 selfloop transitions, 77 changer transitions 0/270 dead transitions. [2024-06-21 22:04:59,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 270 transitions, 3645 flow [2024-06-21 22:04:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:04:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:04:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 22:04:59,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 22:04:59,049 INFO L175 Difference]: Start difference. First operand has 176 places, 210 transitions, 2523 flow. Second operand 8 states and 152 transitions. [2024-06-21 22:04:59,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 270 transitions, 3645 flow [2024-06-21 22:04:59,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 270 transitions, 3523 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 22:04:59,302 INFO L231 Difference]: Finished difference. Result has 180 places, 234 transitions, 3023 flow [2024-06-21 22:04:59,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2416, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3023, PETRI_PLACES=180, PETRI_TRANSITIONS=234} [2024-06-21 22:04:59,303 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2024-06-21 22:04:59,303 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 234 transitions, 3023 flow [2024-06-21 22:04:59,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:59,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:59,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:04:59,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:04:59,304 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)] === [2024-06-21 22:04:59,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2117521524, now seen corresponding path program 1 times [2024-06-21 22:04:59,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:59,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130630833] [2024-06-21 22:04:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:59,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:59,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130630833] [2024-06-21 22:04:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130630833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:59,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:59,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:04:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735274290] [2024-06-21 22:04:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:59,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:04:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:04:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:00,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:00,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 234 transitions, 3023 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:00,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:00,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:00,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:00,808 INFO L124 PetriNetUnfolderBase]: 2727/4114 cut-off events. [2024-06-21 22:05:00,808 INFO L125 PetriNetUnfolderBase]: For 141914/141924 co-relation queries the response was YES. [2024-06-21 22:05:00,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28871 conditions, 4114 events. 2727/4114 cut-off events. For 141914/141924 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20976 event pairs, 608 based on Foata normal form. 14/4127 useless extension candidates. Maximal degree in co-relation 28781. Up to 3637 conditions per place. [2024-06-21 22:05:00,841 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 202 selfloop transitions, 73 changer transitions 0/278 dead transitions. [2024-06-21 22:05:00,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 278 transitions, 3931 flow [2024-06-21 22:05:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 22:05:00,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2024-06-21 22:05:00,842 INFO L175 Difference]: Start difference. First operand has 180 places, 234 transitions, 3023 flow. Second operand 7 states and 137 transitions. [2024-06-21 22:05:00,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 278 transitions, 3931 flow [2024-06-21 22:05:01,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 278 transitions, 3858 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 22:05:01,063 INFO L231 Difference]: Finished difference. Result has 187 places, 245 transitions, 3379 flow [2024-06-21 22:05:01,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3379, PETRI_PLACES=187, PETRI_TRANSITIONS=245} [2024-06-21 22:05:01,064 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2024-06-21 22:05:01,064 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 245 transitions, 3379 flow [2024-06-21 22:05:01,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:01,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:01,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:05:01,065 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:01,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash -612369916, now seen corresponding path program 1 times [2024-06-21 22:05:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:01,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067101701] [2024-06-21 22:05:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:01,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067101701] [2024-06-21 22:05:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067101701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:01,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:01,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241152951] [2024-06-21 22:05:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:02,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:02,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 245 transitions, 3379 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:02,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:02,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:02,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:03,048 INFO L124 PetriNetUnfolderBase]: 2809/4242 cut-off events. [2024-06-21 22:05:03,048 INFO L125 PetriNetUnfolderBase]: For 165983/165983 co-relation queries the response was YES. [2024-06-21 22:05:03,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31323 conditions, 4242 events. 2809/4242 cut-off events. For 165983/165983 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21766 event pairs, 727 based on Foata normal form. 10/4251 useless extension candidates. Maximal degree in co-relation 31229. Up to 3982 conditions per place. [2024-06-21 22:05:03,094 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 247 selfloop transitions, 29 changer transitions 0/279 dead transitions. [2024-06-21 22:05:03,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 279 transitions, 4197 flow [2024-06-21 22:05:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:05:03,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652014652014652 [2024-06-21 22:05:03,095 INFO L175 Difference]: Start difference. First operand has 187 places, 245 transitions, 3379 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:05:03,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 279 transitions, 4197 flow [2024-06-21 22:05:03,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 279 transitions, 4146 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 22:05:03,365 INFO L231 Difference]: Finished difference. Result has 192 places, 247 transitions, 3416 flow [2024-06-21 22:05:03,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3416, PETRI_PLACES=192, PETRI_TRANSITIONS=247} [2024-06-21 22:05:03,366 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 152 predicate places. [2024-06-21 22:05:03,366 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 247 transitions, 3416 flow [2024-06-21 22:05:03,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:03,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:03,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:03,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:05:03,367 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)] === [2024-06-21 22:05:03,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash -612309466, now seen corresponding path program 2 times [2024-06-21 22:05:03,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:03,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432242327] [2024-06-21 22:05:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:03,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:04,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:04,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432242327] [2024-06-21 22:05:04,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432242327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:04,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:04,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:04,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237274681] [2024-06-21 22:05:04,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:04,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:04,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:04,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:04,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:04,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:04,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 247 transitions, 3416 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:04,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:04,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:04,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:05,341 INFO L124 PetriNetUnfolderBase]: 2861/4322 cut-off events. [2024-06-21 22:05:05,341 INFO L125 PetriNetUnfolderBase]: For 177008/177008 co-relation queries the response was YES. [2024-06-21 22:05:05,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31933 conditions, 4322 events. 2861/4322 cut-off events. For 177008/177008 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22293 event pairs, 782 based on Foata normal form. 14/4335 useless extension candidates. Maximal degree in co-relation 31837. Up to 4163 conditions per place. [2024-06-21 22:05:05,384 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 241 selfloop transitions, 28 changer transitions 0/272 dead transitions. [2024-06-21 22:05:05,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 272 transitions, 4088 flow [2024-06-21 22:05:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 22:05:05,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468864468864469 [2024-06-21 22:05:05,385 INFO L175 Difference]: Start difference. First operand has 192 places, 247 transitions, 3416 flow. Second operand 7 states and 122 transitions. [2024-06-21 22:05:05,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 272 transitions, 4088 flow [2024-06-21 22:05:05,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 272 transitions, 4053 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:05,711 INFO L231 Difference]: Finished difference. Result has 196 places, 248 transitions, 3458 flow [2024-06-21 22:05:05,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3458, PETRI_PLACES=196, PETRI_TRANSITIONS=248} [2024-06-21 22:05:05,712 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 156 predicate places. [2024-06-21 22:05:05,712 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 248 transitions, 3458 flow [2024-06-21 22:05:05,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:05,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:05,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:05,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:05:05,713 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)] === [2024-06-21 22:05:05,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:05,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2111272358, now seen corresponding path program 3 times [2024-06-21 22:05:05,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:05,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487833983] [2024-06-21 22:05:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:05,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:06,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487833983] [2024-06-21 22:05:06,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487833983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:06,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:06,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:06,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493162347] [2024-06-21 22:05:06,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:06,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:06,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:06,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:06,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:06,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:06,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 248 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:06,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:06,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:06,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:07,533 INFO L124 PetriNetUnfolderBase]: 2828/4275 cut-off events. [2024-06-21 22:05:07,534 INFO L125 PetriNetUnfolderBase]: For 172137/172137 co-relation queries the response was YES. [2024-06-21 22:05:07,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31406 conditions, 4275 events. 2828/4275 cut-off events. For 172137/172137 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21985 event pairs, 738 based on Foata normal form. 14/4288 useless extension candidates. Maximal degree in co-relation 31308. Up to 4122 conditions per place. [2024-06-21 22:05:07,572 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 242 selfloop transitions, 26 changer transitions 0/271 dead transitions. [2024-06-21 22:05:07,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 271 transitions, 4096 flow [2024-06-21 22:05:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 22:05:07,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 22:05:07,574 INFO L175 Difference]: Start difference. First operand has 196 places, 248 transitions, 3458 flow. Second operand 6 states and 111 transitions. [2024-06-21 22:05:07,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 271 transitions, 4096 flow [2024-06-21 22:05:07,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 271 transitions, 4037 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:07,876 INFO L231 Difference]: Finished difference. Result has 197 places, 248 transitions, 3461 flow [2024-06-21 22:05:07,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3461, PETRI_PLACES=197, PETRI_TRANSITIONS=248} [2024-06-21 22:05:07,877 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 157 predicate places. [2024-06-21 22:05:07,877 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 248 transitions, 3461 flow [2024-06-21 22:05:07,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:07,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:07,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:07,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:05:07,877 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)] === [2024-06-21 22:05:07,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1700780544, now seen corresponding path program 1 times [2024-06-21 22:05:07,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:07,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158458437] [2024-06-21 22:05:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:07,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:08,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158458437] [2024-06-21 22:05:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158458437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:08,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:08,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984295620] [2024-06-21 22:05:08,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:08,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:08,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 248 transitions, 3461 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:08,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:08,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:08,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:09,462 INFO L124 PetriNetUnfolderBase]: 2810/4250 cut-off events. [2024-06-21 22:05:09,462 INFO L125 PetriNetUnfolderBase]: For 166488/166500 co-relation queries the response was YES. [2024-06-21 22:05:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31095 conditions, 4250 events. 2810/4250 cut-off events. For 166488/166500 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21976 event pairs, 622 based on Foata normal form. 16/4265 useless extension candidates. Maximal degree in co-relation 30996. Up to 3537 conditions per place. [2024-06-21 22:05:09,496 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 191 selfloop transitions, 91 changer transitions 0/285 dead transitions. [2024-06-21 22:05:09,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 285 transitions, 4287 flow [2024-06-21 22:05:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:05:09,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-06-21 22:05:09,497 INFO L175 Difference]: Start difference. First operand has 197 places, 248 transitions, 3461 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:05:09,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 285 transitions, 4287 flow [2024-06-21 22:05:09,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 285 transitions, 4216 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:09,798 INFO L231 Difference]: Finished difference. Result has 200 places, 248 transitions, 3578 flow [2024-06-21 22:05:09,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3578, PETRI_PLACES=200, PETRI_TRANSITIONS=248} [2024-06-21 22:05:09,799 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 160 predicate places. [2024-06-21 22:05:09,799 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 248 transitions, 3578 flow [2024-06-21 22:05:09,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:09,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:09,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:05:09,800 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:09,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash 519459064, now seen corresponding path program 2 times [2024-06-21 22:05:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:09,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456799485] [2024-06-21 22:05:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:10,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:10,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456799485] [2024-06-21 22:05:10,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456799485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:10,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:10,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:10,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884427004] [2024-06-21 22:05:10,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:10,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:10,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:10,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 248 transitions, 3578 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:10,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:10,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:10,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:11,317 INFO L124 PetriNetUnfolderBase]: 2840/4292 cut-off events. [2024-06-21 22:05:11,317 INFO L125 PetriNetUnfolderBase]: For 175607/175609 co-relation queries the response was YES. [2024-06-21 22:05:11,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31962 conditions, 4292 events. 2840/4292 cut-off events. For 175607/175609 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22207 event pairs, 629 based on Foata normal form. 8/4299 useless extension candidates. Maximal degree in co-relation 31862. Up to 3559 conditions per place. [2024-06-21 22:05:11,359 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 195 selfloop transitions, 88 changer transitions 0/286 dead transitions. [2024-06-21 22:05:11,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 286 transitions, 4470 flow [2024-06-21 22:05:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:05:11,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 22:05:11,360 INFO L175 Difference]: Start difference. First operand has 200 places, 248 transitions, 3578 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:05:11,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 286 transitions, 4470 flow [2024-06-21 22:05:11,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 286 transitions, 4179 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 22:05:11,679 INFO L231 Difference]: Finished difference. Result has 199 places, 251 transitions, 3530 flow [2024-06-21 22:05:11,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3530, PETRI_PLACES=199, PETRI_TRANSITIONS=251} [2024-06-21 22:05:11,679 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 159 predicate places. [2024-06-21 22:05:11,680 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 251 transitions, 3530 flow [2024-06-21 22:05:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:11,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:11,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:11,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:05:11,680 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)] === [2024-06-21 22:05:11,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1693159008, now seen corresponding path program 1 times [2024-06-21 22:05:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:11,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526829544] [2024-06-21 22:05:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:11,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:12,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:12,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526829544] [2024-06-21 22:05:12,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526829544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:12,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:12,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:12,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893769623] [2024-06-21 22:05:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:12,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:12,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:12,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:12,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:12,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:12,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 251 transitions, 3530 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) [2024-06-21 22:05:12,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:12,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:12,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:13,611 INFO L124 PetriNetUnfolderBase]: 2951/4461 cut-off events. [2024-06-21 22:05:13,612 INFO L125 PetriNetUnfolderBase]: For 197546/197559 co-relation queries the response was YES. [2024-06-21 22:05:13,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33125 conditions, 4461 events. 2951/4461 cut-off events. For 197546/197559 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23187 event pairs, 538 based on Foata normal form. 22/4482 useless extension candidates. Maximal degree in co-relation 33026. Up to 3463 conditions per place. [2024-06-21 22:05:13,656 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 214 selfloop transitions, 120 changer transitions 0/337 dead transitions. [2024-06-21 22:05:13,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 337 transitions, 5240 flow [2024-06-21 22:05:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 22:05:13,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985754985754986 [2024-06-21 22:05:13,658 INFO L175 Difference]: Start difference. First operand has 199 places, 251 transitions, 3530 flow. Second operand 9 states and 175 transitions. [2024-06-21 22:05:13,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 337 transitions, 5240 flow [2024-06-21 22:05:13,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 337 transitions, 5040 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:13,969 INFO L231 Difference]: Finished difference. Result has 207 places, 288 transitions, 4280 flow [2024-06-21 22:05:13,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4280, PETRI_PLACES=207, PETRI_TRANSITIONS=288} [2024-06-21 22:05:13,970 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2024-06-21 22:05:13,970 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 288 transitions, 4280 flow [2024-06-21 22:05:13,970 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) [2024-06-21 22:05:13,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:13,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:13,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:05:13,971 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)] === [2024-06-21 22:05:13,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:13,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1693368537, now seen corresponding path program 1 times [2024-06-21 22:05:13,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:13,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156172047] [2024-06-21 22:05:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:14,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:14,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156172047] [2024-06-21 22:05:14,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156172047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:14,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039190108] [2024-06-21 22:05:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:14,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:14,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:15,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:15,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 288 transitions, 4280 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) [2024-06-21 22:05:15,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:15,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:16,048 INFO L124 PetriNetUnfolderBase]: 3029/4568 cut-off events. [2024-06-21 22:05:16,049 INFO L125 PetriNetUnfolderBase]: For 215434/215446 co-relation queries the response was YES. [2024-06-21 22:05:16,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35853 conditions, 4568 events. 3029/4568 cut-off events. For 215434/215446 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23817 event pairs, 660 based on Foata normal form. 16/4583 useless extension candidates. Maximal degree in co-relation 35749. Up to 3559 conditions per place. [2024-06-21 22:05:16,094 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 201 selfloop transitions, 143 changer transitions 0/347 dead transitions. [2024-06-21 22:05:16,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 347 transitions, 5533 flow [2024-06-21 22:05:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:05:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:05:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-21 22:05:16,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47086247086247085 [2024-06-21 22:05:16,096 INFO L175 Difference]: Start difference. First operand has 207 places, 288 transitions, 4280 flow. Second operand 11 states and 202 transitions. [2024-06-21 22:05:16,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 347 transitions, 5533 flow [2024-06-21 22:05:16,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 347 transitions, 5463 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-21 22:05:16,524 INFO L231 Difference]: Finished difference. Result has 218 places, 297 transitions, 4696 flow [2024-06-21 22:05:16,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4222, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4696, PETRI_PLACES=218, PETRI_TRANSITIONS=297} [2024-06-21 22:05:16,525 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 178 predicate places. [2024-06-21 22:05:16,525 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 297 transitions, 4696 flow [2024-06-21 22:05:16,526 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) [2024-06-21 22:05:16,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:16,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:05:16,526 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:16,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1693368258, now seen corresponding path program 2 times [2024-06-21 22:05:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333132372] [2024-06-21 22:05:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:17,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:17,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333132372] [2024-06-21 22:05:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333132372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:17,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343942501] [2024-06-21 22:05:17,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:17,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:17,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 297 transitions, 4696 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) [2024-06-21 22:05:17,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:17,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:17,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:18,467 INFO L124 PetriNetUnfolderBase]: 3093/4665 cut-off events. [2024-06-21 22:05:18,467 INFO L125 PetriNetUnfolderBase]: For 235913/235926 co-relation queries the response was YES. [2024-06-21 22:05:18,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37450 conditions, 4665 events. 3093/4665 cut-off events. For 235913/235926 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24405 event pairs, 660 based on Foata normal form. 23/4687 useless extension candidates. Maximal degree in co-relation 37342. Up to 4042 conditions per place. [2024-06-21 22:05:18,514 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 219 selfloop transitions, 125 changer transitions 0/347 dead transitions. [2024-06-21 22:05:18,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 347 transitions, 5948 flow [2024-06-21 22:05:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 22:05:18,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 22:05:18,516 INFO L175 Difference]: Start difference. First operand has 218 places, 297 transitions, 4696 flow. Second operand 9 states and 169 transitions. [2024-06-21 22:05:18,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 347 transitions, 5948 flow [2024-06-21 22:05:19,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 347 transitions, 5685 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:19,152 INFO L231 Difference]: Finished difference. Result has 222 places, 306 transitions, 4824 flow [2024-06-21 22:05:19,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4437, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4824, PETRI_PLACES=222, PETRI_TRANSITIONS=306} [2024-06-21 22:05:19,153 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 182 predicate places. [2024-06-21 22:05:19,153 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 306 transitions, 4824 flow [2024-06-21 22:05:19,153 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) [2024-06-21 22:05:19,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:19,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:19,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:05:19,154 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)] === [2024-06-21 22:05:19,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:19,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1700777568, now seen corresponding path program 3 times [2024-06-21 22:05:19,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:19,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863576588] [2024-06-21 22:05:19,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:19,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:20,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863576588] [2024-06-21 22:05:20,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863576588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:20,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:20,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:20,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352570186] [2024-06-21 22:05:20,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:20,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:20,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:20,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:20,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:20,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 306 transitions, 4824 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) [2024-06-21 22:05:20,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:20,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:20,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:21,188 INFO L124 PetriNetUnfolderBase]: 3393/5140 cut-off events. [2024-06-21 22:05:21,188 INFO L125 PetriNetUnfolderBase]: For 344587/344599 co-relation queries the response was YES. [2024-06-21 22:05:21,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40686 conditions, 5140 events. 3393/5140 cut-off events. For 344587/344599 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27337 event pairs, 729 based on Foata normal form. 98/5237 useless extension candidates. Maximal degree in co-relation 40575. Up to 3918 conditions per place. [2024-06-21 22:05:21,241 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 230 selfloop transitions, 120 changer transitions 2/355 dead transitions. [2024-06-21 22:05:21,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 355 transitions, 5966 flow [2024-06-21 22:05:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:05:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:05:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 22:05:21,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843304843304843 [2024-06-21 22:05:21,243 INFO L175 Difference]: Start difference. First operand has 222 places, 306 transitions, 4824 flow. Second operand 9 states and 170 transitions. [2024-06-21 22:05:21,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 355 transitions, 5966 flow [2024-06-21 22:05:21,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 355 transitions, 5684 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:21,792 INFO L231 Difference]: Finished difference. Result has 225 places, 308 transitions, 4872 flow [2024-06-21 22:05:21,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4550, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4872, PETRI_PLACES=225, PETRI_TRANSITIONS=308} [2024-06-21 22:05:21,792 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 185 predicate places. [2024-06-21 22:05:21,793 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 308 transitions, 4872 flow [2024-06-21 22:05:21,793 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) [2024-06-21 22:05:21,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:21,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:21,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:05:21,793 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)] === [2024-06-21 22:05:21,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:21,794 INFO L85 PathProgramCache]: Analyzing trace with hash -316892211, now seen corresponding path program 1 times [2024-06-21 22:05:21,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:21,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076139984] [2024-06-21 22:05:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:21,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:22,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:22,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076139984] [2024-06-21 22:05:22,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076139984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:22,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:22,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:22,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587662639] [2024-06-21 22:05:22,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:22,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:22,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:22,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:22,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:22,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 308 transitions, 4872 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) [2024-06-21 22:05:22,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:22,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:22,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:23,923 INFO L124 PetriNetUnfolderBase]: 3361/5091 cut-off events. [2024-06-21 22:05:23,923 INFO L125 PetriNetUnfolderBase]: For 254927/254937 co-relation queries the response was YES. [2024-06-21 22:05:23,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40877 conditions, 5091 events. 3361/5091 cut-off events. For 254927/254937 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27137 event pairs, 899 based on Foata normal form. 10/5100 useless extension candidates. Maximal degree in co-relation 40765. Up to 5028 conditions per place. [2024-06-21 22:05:23,975 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 300 selfloop transitions, 26 changer transitions 0/329 dead transitions. [2024-06-21 22:05:23,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 329 transitions, 5624 flow [2024-06-21 22:05:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:05:23,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2024-06-21 22:05:23,976 INFO L175 Difference]: Start difference. First operand has 225 places, 308 transitions, 4872 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:05:23,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 329 transitions, 5624 flow [2024-06-21 22:05:24,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 329 transitions, 5375 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:24,435 INFO L231 Difference]: Finished difference. Result has 227 places, 310 transitions, 4736 flow [2024-06-21 22:05:24,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4736, PETRI_PLACES=227, PETRI_TRANSITIONS=310} [2024-06-21 22:05:24,436 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 187 predicate places. [2024-06-21 22:05:24,436 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 310 transitions, 4736 flow [2024-06-21 22:05:24,436 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) [2024-06-21 22:05:24,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:24,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:24,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:05:24,436 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)] === [2024-06-21 22:05:24,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash -316904115, now seen corresponding path program 2 times [2024-06-21 22:05:24,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:24,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033230659] [2024-06-21 22:05:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:25,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:25,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033230659] [2024-06-21 22:05:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033230659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:25,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:25,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678075031] [2024-06-21 22:05:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:25,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:25,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:25,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:25,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 310 transitions, 4736 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) [2024-06-21 22:05:25,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:25,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:25,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:26,847 INFO L124 PetriNetUnfolderBase]: 3421/5175 cut-off events. [2024-06-21 22:05:26,847 INFO L125 PetriNetUnfolderBase]: For 264403/264413 co-relation queries the response was YES. [2024-06-21 22:05:26,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40914 conditions, 5175 events. 3421/5175 cut-off events. For 264403/264413 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27618 event pairs, 883 based on Foata normal form. 14/5188 useless extension candidates. Maximal degree in co-relation 40801. Up to 4973 conditions per place. [2024-06-21 22:05:26,906 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 298 selfloop transitions, 45 changer transitions 0/346 dead transitions. [2024-06-21 22:05:26,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 346 transitions, 5631 flow [2024-06-21 22:05:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:05:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:05:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 22:05:26,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-06-21 22:05:26,907 INFO L175 Difference]: Start difference. First operand has 227 places, 310 transitions, 4736 flow. Second operand 11 states and 176 transitions. [2024-06-21 22:05:26,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 346 transitions, 5631 flow [2024-06-21 22:05:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 346 transitions, 5522 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:27,469 INFO L231 Difference]: Finished difference. Result has 232 places, 318 transitions, 4859 flow [2024-06-21 22:05:27,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4859, PETRI_PLACES=232, PETRI_TRANSITIONS=318} [2024-06-21 22:05:27,469 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 192 predicate places. [2024-06-21 22:05:27,469 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 318 transitions, 4859 flow [2024-06-21 22:05:27,470 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) [2024-06-21 22:05:27,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:27,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:27,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 22:05:27,470 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)] === [2024-06-21 22:05:27,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash -317221245, now seen corresponding path program 3 times [2024-06-21 22:05:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316616898] [2024-06-21 22:05:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:27,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:28,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:28,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316616898] [2024-06-21 22:05:28,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316616898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:28,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:28,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:28,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835804186] [2024-06-21 22:05:28,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:28,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:28,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:28,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:28,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:28,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:28,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 318 transitions, 4859 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) [2024-06-21 22:05:28,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:28,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:28,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:29,774 INFO L124 PetriNetUnfolderBase]: 3451/5217 cut-off events. [2024-06-21 22:05:29,774 INFO L125 PetriNetUnfolderBase]: For 273685/273695 co-relation queries the response was YES. [2024-06-21 22:05:29,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41527 conditions, 5217 events. 3451/5217 cut-off events. For 273685/273695 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27850 event pairs, 887 based on Foata normal form. 14/5230 useless extension candidates. Maximal degree in co-relation 41413. Up to 5015 conditions per place. [2024-06-21 22:05:29,832 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 301 selfloop transitions, 46 changer transitions 0/350 dead transitions. [2024-06-21 22:05:29,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 350 transitions, 5723 flow [2024-06-21 22:05:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 22:05:29,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256410256410256 [2024-06-21 22:05:29,833 INFO L175 Difference]: Start difference. First operand has 232 places, 318 transitions, 4859 flow. Second operand 10 states and 166 transitions. [2024-06-21 22:05:29,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 350 transitions, 5723 flow [2024-06-21 22:05:30,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 350 transitions, 5593 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 22:05:30,399 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 4916 flow [2024-06-21 22:05:30,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4916, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-21 22:05:30,400 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 194 predicate places. [2024-06-21 22:05:30,400 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 4916 flow [2024-06-21 22:05:30,400 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) [2024-06-21 22:05:30,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:30,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:30,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 22:05:30,401 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)] === [2024-06-21 22:05:30,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -317230824, now seen corresponding path program 4 times [2024-06-21 22:05:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:30,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746755656] [2024-06-21 22:05:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:31,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746755656] [2024-06-21 22:05:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746755656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:05:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968068033] [2024-06-21 22:05:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:31,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:05:31,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:05:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:05:31,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:31,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 4916 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) [2024-06-21 22:05:31,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:31,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:31,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:32,926 INFO L124 PetriNetUnfolderBase]: 3751/5693 cut-off events. [2024-06-21 22:05:32,926 INFO L125 PetriNetUnfolderBase]: For 400441/400451 co-relation queries the response was YES. [2024-06-21 22:05:32,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44413 conditions, 5693 events. 3751/5693 cut-off events. For 400441/400451 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30896 event pairs, 945 based on Foata normal form. 96/5788 useless extension candidates. Maximal degree in co-relation 44299. Up to 4970 conditions per place. [2024-06-21 22:05:33,002 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 301 selfloop transitions, 52 changer transitions 5/361 dead transitions. [2024-06-21 22:05:33,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 361 transitions, 5898 flow [2024-06-21 22:05:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 22:05:33,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441025641025641 [2024-06-21 22:05:33,003 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 4916 flow. Second operand 10 states and 172 transitions. [2024-06-21 22:05:33,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 361 transitions, 5898 flow [2024-06-21 22:05:33,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 361 transitions, 5729 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-21 22:05:33,619 INFO L231 Difference]: Finished difference. Result has 234 places, 321 transitions, 4912 flow [2024-06-21 22:05:33,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4912, PETRI_PLACES=234, PETRI_TRANSITIONS=321} [2024-06-21 22:05:33,620 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 194 predicate places. [2024-06-21 22:05:33,620 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 321 transitions, 4912 flow [2024-06-21 22:05:33,620 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) [2024-06-21 22:05:33,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:33,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:33,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 22:05:33,620 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)] === [2024-06-21 22:05:33,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash -317230545, now seen corresponding path program 4 times [2024-06-21 22:05:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:33,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632376204] [2024-06-21 22:05:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:33,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:34,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:34,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632376204] [2024-06-21 22:05:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632376204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:34,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275729713] [2024-06-21 22:05:34,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:34,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:34,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:34,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:34,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:34,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 321 transitions, 4912 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) [2024-06-21 22:05:34,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:34,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:34,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:35,966 INFO L124 PetriNetUnfolderBase]: 3693/5615 cut-off events. [2024-06-21 22:05:35,966 INFO L125 PetriNetUnfolderBase]: For 297971/297981 co-relation queries the response was YES. [2024-06-21 22:05:36,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44211 conditions, 5615 events. 3693/5615 cut-off events. For 297971/297981 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30503 event pairs, 983 based on Foata normal form. 14/5628 useless extension candidates. Maximal degree in co-relation 44098. Up to 5392 conditions per place. [2024-06-21 22:05:36,029 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 299 selfloop transitions, 53 changer transitions 1/356 dead transitions. [2024-06-21 22:05:36,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 356 transitions, 5784 flow [2024-06-21 22:05:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:05:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:05:36,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-21 22:05:36,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219114219114219 [2024-06-21 22:05:36,031 INFO L175 Difference]: Start difference. First operand has 234 places, 321 transitions, 4912 flow. Second operand 11 states and 181 transitions. [2024-06-21 22:05:36,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 356 transitions, 5784 flow [2024-06-21 22:05:36,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 356 transitions, 5655 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 22:05:36,708 INFO L231 Difference]: Finished difference. Result has 237 places, 325 transitions, 4968 flow [2024-06-21 22:05:36,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4968, PETRI_PLACES=237, PETRI_TRANSITIONS=325} [2024-06-21 22:05:36,708 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 197 predicate places. [2024-06-21 22:05:36,708 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 325 transitions, 4968 flow [2024-06-21 22:05:36,709 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) [2024-06-21 22:05:36,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:36,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:36,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 22:05:36,709 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)] === [2024-06-21 22:05:36,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1662444884, now seen corresponding path program 3 times [2024-06-21 22:05:36,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:36,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256665928] [2024-06-21 22:05:36,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256665928] [2024-06-21 22:05:37,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256665928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:37,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:37,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915359707] [2024-06-21 22:05:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:37,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:37,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:37,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 325 transitions, 4968 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:37,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:37,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:37,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:38,535 INFO L124 PetriNetUnfolderBase]: 3723/5663 cut-off events. [2024-06-21 22:05:38,535 INFO L125 PetriNetUnfolderBase]: For 308951/308951 co-relation queries the response was YES. [2024-06-21 22:05:38,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44524 conditions, 5663 events. 3723/5663 cut-off events. For 308951/308951 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30876 event pairs, 1053 based on Foata normal form. 6/5668 useless extension candidates. Maximal degree in co-relation 44410. Up to 5507 conditions per place. [2024-06-21 22:05:38,601 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 314 selfloop transitions, 39 changer transitions 0/356 dead transitions. [2024-06-21 22:05:38,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 356 transitions, 5916 flow [2024-06-21 22:05:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:05:38,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2024-06-21 22:05:38,602 INFO L175 Difference]: Start difference. First operand has 237 places, 325 transitions, 4968 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:05:38,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 356 transitions, 5916 flow [2024-06-21 22:05:39,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 356 transitions, 5767 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 22:05:39,247 INFO L231 Difference]: Finished difference. Result has 236 places, 330 transitions, 5033 flow [2024-06-21 22:05:39,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4819, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5033, PETRI_PLACES=236, PETRI_TRANSITIONS=330} [2024-06-21 22:05:39,247 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 196 predicate places. [2024-06-21 22:05:39,247 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 330 transitions, 5033 flow [2024-06-21 22:05:39,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:39,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:39,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:39,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 22:05:39,248 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:05:39,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:39,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1812207472, now seen corresponding path program 1 times [2024-06-21 22:05:39,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:39,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928543219] [2024-06-21 22:05:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:40,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:40,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928543219] [2024-06-21 22:05:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928543219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:40,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:40,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614784913] [2024-06-21 22:05:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:40,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:40,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 330 transitions, 5033 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:40,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:40,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:40,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:41,380 INFO L124 PetriNetUnfolderBase]: 3770/5728 cut-off events. [2024-06-21 22:05:41,380 INFO L125 PetriNetUnfolderBase]: For 321888/321888 co-relation queries the response was YES. [2024-06-21 22:05:41,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45278 conditions, 5728 events. 3770/5728 cut-off events. For 321888/321888 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31319 event pairs, 1016 based on Foata normal form. 3/5730 useless extension candidates. Maximal degree in co-relation 45163. Up to 5457 conditions per place. [2024-06-21 22:05:41,443 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 301 selfloop transitions, 63 changer transitions 0/367 dead transitions. [2024-06-21 22:05:41,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 367 transitions, 6224 flow [2024-06-21 22:05:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:05:41,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-21 22:05:41,445 INFO L175 Difference]: Start difference. First operand has 236 places, 330 transitions, 5033 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:05:41,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 367 transitions, 6224 flow [2024-06-21 22:05:42,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 367 transitions, 6089 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:42,223 INFO L231 Difference]: Finished difference. Result has 238 places, 341 transitions, 5326 flow [2024-06-21 22:05:42,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4898, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5326, PETRI_PLACES=238, PETRI_TRANSITIONS=341} [2024-06-21 22:05:42,223 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 198 predicate places. [2024-06-21 22:05:42,223 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 341 transitions, 5326 flow [2024-06-21 22:05:42,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:42,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:42,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:42,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 22:05:42,224 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)] === [2024-06-21 22:05:42,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2033553982, now seen corresponding path program 2 times [2024-06-21 22:05:42,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:42,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824216108] [2024-06-21 22:05:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:42,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824216108] [2024-06-21 22:05:42,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824216108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:42,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:42,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494983984] [2024-06-21 22:05:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:42,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:42,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:42,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:42,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:42,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 341 transitions, 5326 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:42,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:42,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:42,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:44,181 INFO L124 PetriNetUnfolderBase]: 3771/5730 cut-off events. [2024-06-21 22:05:44,181 INFO L125 PetriNetUnfolderBase]: For 332791/332791 co-relation queries the response was YES. [2024-06-21 22:05:44,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45866 conditions, 5730 events. 3771/5730 cut-off events. For 332791/332791 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31325 event pairs, 1033 based on Foata normal form. 5/5734 useless extension candidates. Maximal degree in co-relation 45749. Up to 5586 conditions per place. [2024-06-21 22:05:44,251 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 321 selfloop transitions, 39 changer transitions 0/363 dead transitions. [2024-06-21 22:05:44,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 363 transitions, 6192 flow [2024-06-21 22:05:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:05:44,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-21 22:05:44,253 INFO L175 Difference]: Start difference. First operand has 238 places, 341 transitions, 5326 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:05:44,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 363 transitions, 6192 flow [2024-06-21 22:05:45,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 6067 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:45,040 INFO L231 Difference]: Finished difference. Result has 241 places, 344 transitions, 5379 flow [2024-06-21 22:05:45,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5209, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5379, PETRI_PLACES=241, PETRI_TRANSITIONS=344} [2024-06-21 22:05:45,041 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 201 predicate places. [2024-06-21 22:05:45,041 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 344 transitions, 5379 flow [2024-06-21 22:05:45,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:45,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:45,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:45,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 22:05:45,042 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)] === [2024-06-21 22:05:45,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:45,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1715277478, now seen corresponding path program 4 times [2024-06-21 22:05:45,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870024320] [2024-06-21 22:05:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:45,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:45,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870024320] [2024-06-21 22:05:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870024320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:45,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:45,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:45,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865794134] [2024-06-21 22:05:45,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:45,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:45,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 344 transitions, 5379 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:45,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:45,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:45,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:46,825 INFO L124 PetriNetUnfolderBase]: 3753/5706 cut-off events. [2024-06-21 22:05:46,825 INFO L125 PetriNetUnfolderBase]: For 322522/322522 co-relation queries the response was YES. [2024-06-21 22:05:46,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45342 conditions, 5706 events. 3753/5706 cut-off events. For 322522/322522 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31168 event pairs, 1072 based on Foata normal form. 6/5711 useless extension candidates. Maximal degree in co-relation 45224. Up to 5614 conditions per place. [2024-06-21 22:05:46,884 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 333 selfloop transitions, 27 changer transitions 0/363 dead transitions. [2024-06-21 22:05:46,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 363 transitions, 6179 flow [2024-06-21 22:05:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:05:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:05:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:05:46,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2024-06-21 22:05:46,886 INFO L175 Difference]: Start difference. First operand has 241 places, 344 transitions, 5379 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:05:46,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 363 transitions, 6179 flow [2024-06-21 22:05:47,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 363 transitions, 6020 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:47,500 INFO L231 Difference]: Finished difference. Result has 243 places, 344 transitions, 5283 flow [2024-06-21 22:05:47,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5283, PETRI_PLACES=243, PETRI_TRANSITIONS=344} [2024-06-21 22:05:47,501 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 203 predicate places. [2024-06-21 22:05:47,501 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 344 transitions, 5283 flow [2024-06-21 22:05:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:47,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:47,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:47,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 22:05:47,502 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)] === [2024-06-21 22:05:47,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1224376713, now seen corresponding path program 1 times [2024-06-21 22:05:47,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:47,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055893930] [2024-06-21 22:05:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:47,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:48,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:48,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055893930] [2024-06-21 22:05:48,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055893930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:48,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:48,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:48,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087003482] [2024-06-21 22:05:48,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:48,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:48,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:48,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:48,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:48,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:48,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 344 transitions, 5283 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:48,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:48,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:48,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:49,468 INFO L124 PetriNetUnfolderBase]: 3741/5690 cut-off events. [2024-06-21 22:05:49,468 INFO L125 PetriNetUnfolderBase]: For 312520/312520 co-relation queries the response was YES. [2024-06-21 22:05:49,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44751 conditions, 5690 events. 3741/5690 cut-off events. For 312520/312520 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31109 event pairs, 1036 based on Foata normal form. 4/5693 useless extension candidates. Maximal degree in co-relation 44633. Up to 5583 conditions per place. [2024-06-21 22:05:49,526 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 331 selfloop transitions, 29 changer transitions 0/363 dead transitions. [2024-06-21 22:05:49,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 363 transitions, 6067 flow [2024-06-21 22:05:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 22:05:49,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 22:05:49,527 INFO L175 Difference]: Start difference. First operand has 243 places, 344 transitions, 5283 flow. Second operand 6 states and 108 transitions. [2024-06-21 22:05:49,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 363 transitions, 6067 flow [2024-06-21 22:05:50,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 363 transitions, 5746 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-21 22:05:50,146 INFO L231 Difference]: Finished difference. Result has 240 places, 344 transitions, 5036 flow [2024-06-21 22:05:50,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5036, PETRI_PLACES=240, PETRI_TRANSITIONS=344} [2024-06-21 22:05:50,146 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 200 predicate places. [2024-06-21 22:05:50,146 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 344 transitions, 5036 flow [2024-06-21 22:05:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:50,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:50,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:50,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 22:05:50,147 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)] === [2024-06-21 22:05:50,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1224169323, now seen corresponding path program 2 times [2024-06-21 22:05:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032600123] [2024-06-21 22:05:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:50,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032600123] [2024-06-21 22:05:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032600123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:50,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:50,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941779671] [2024-06-21 22:05:50,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:50,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:50,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 344 transitions, 5036 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:50,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:50,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:50,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:52,155 INFO L124 PetriNetUnfolderBase]: 3709/5644 cut-off events. [2024-06-21 22:05:52,155 INFO L125 PetriNetUnfolderBase]: For 302782/302782 co-relation queries the response was YES. [2024-06-21 22:05:52,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43342 conditions, 5644 events. 3709/5644 cut-off events. For 302782/302782 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30811 event pairs, 845 based on Foata normal form. 8/5651 useless extension candidates. Maximal degree in co-relation 43223. Up to 5171 conditions per place. [2024-06-21 22:05:52,213 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 300 selfloop transitions, 71 changer transitions 0/374 dead transitions. [2024-06-21 22:05:52,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 374 transitions, 5898 flow [2024-06-21 22:05:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 22:05:52,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 22:05:52,214 INFO L175 Difference]: Start difference. First operand has 240 places, 344 transitions, 5036 flow. Second operand 7 states and 133 transitions. [2024-06-21 22:05:52,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 374 transitions, 5898 flow [2024-06-21 22:05:52,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 374 transitions, 5776 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:52,918 INFO L231 Difference]: Finished difference. Result has 241 places, 344 transitions, 5086 flow [2024-06-21 22:05:52,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4914, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5086, PETRI_PLACES=241, PETRI_TRANSITIONS=344} [2024-06-21 22:05:52,918 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 201 predicate places. [2024-06-21 22:05:52,918 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 344 transitions, 5086 flow [2024-06-21 22:05:52,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:52,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:52,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:52,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 22:05:52,919 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)] === [2024-06-21 22:05:52,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1024925968, now seen corresponding path program 3 times [2024-06-21 22:05:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:52,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123825179] [2024-06-21 22:05:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:52,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:53,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123825179] [2024-06-21 22:05:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123825179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:53,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:53,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862494911] [2024-06-21 22:05:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:53,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:53,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 344 transitions, 5086 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:53,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:53,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:53,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:55,102 INFO L124 PetriNetUnfolderBase]: 3700/5634 cut-off events. [2024-06-21 22:05:55,102 INFO L125 PetriNetUnfolderBase]: For 282633/282633 co-relation queries the response was YES. [2024-06-21 22:05:55,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42965 conditions, 5634 events. 3700/5634 cut-off events. For 282633/282633 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30805 event pairs, 1027 based on Foata normal form. 3/5636 useless extension candidates. Maximal degree in co-relation 42847. Up to 5483 conditions per place. [2024-06-21 22:05:55,157 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 318 selfloop transitions, 42 changer transitions 0/363 dead transitions. [2024-06-21 22:05:55,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 363 transitions, 5870 flow [2024-06-21 22:05:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 22:05:55,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658119658119658 [2024-06-21 22:05:55,158 INFO L175 Difference]: Start difference. First operand has 241 places, 344 transitions, 5086 flow. Second operand 6 states and 109 transitions. [2024-06-21 22:05:55,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 363 transitions, 5870 flow [2024-06-21 22:05:55,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 5702 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 22:05:55,869 INFO L231 Difference]: Finished difference. Result has 241 places, 344 transitions, 5031 flow [2024-06-21 22:05:55,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4920, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5031, PETRI_PLACES=241, PETRI_TRANSITIONS=344} [2024-06-21 22:05:55,869 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 201 predicate places. [2024-06-21 22:05:55,869 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 344 transitions, 5031 flow [2024-06-21 22:05:55,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:55,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:55,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:55,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 22:05:55,870 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)] === [2024-06-21 22:05:55,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:55,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1231557739, now seen corresponding path program 2 times [2024-06-21 22:05:55,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:55,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14209957] [2024-06-21 22:05:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:55,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:56,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:56,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14209957] [2024-06-21 22:05:56,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14209957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:56,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:56,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:56,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593121341] [2024-06-21 22:05:56,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:56,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:56,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:56,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:56,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:56,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 344 transitions, 5031 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) [2024-06-21 22:05:56,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:56,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:56,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:58,088 INFO L124 PetriNetUnfolderBase]: 3708/5640 cut-off events. [2024-06-21 22:05:58,088 INFO L125 PetriNetUnfolderBase]: For 279947/279957 co-relation queries the response was YES. [2024-06-21 22:05:58,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42682 conditions, 5640 events. 3708/5640 cut-off events. For 279947/279957 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30786 event pairs, 977 based on Foata normal form. 10/5649 useless extension candidates. Maximal degree in co-relation 42565. Up to 5555 conditions per place. [2024-06-21 22:05:58,152 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 330 selfloop transitions, 30 changer transitions 0/363 dead transitions. [2024-06-21 22:05:58,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 363 transitions, 5851 flow [2024-06-21 22:05:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 22:05:58,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:05:58,153 INFO L175 Difference]: Start difference. First operand has 241 places, 344 transitions, 5031 flow. Second operand 6 states and 104 transitions. [2024-06-21 22:05:58,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 363 transitions, 5851 flow [2024-06-21 22:05:58,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 363 transitions, 5722 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:05:58,937 INFO L231 Difference]: Finished difference. Result has 240 places, 346 transitions, 5031 flow [2024-06-21 22:05:58,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5031, PETRI_PLACES=240, PETRI_TRANSITIONS=346} [2024-06-21 22:05:58,937 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 200 predicate places. [2024-06-21 22:05:58,937 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 346 transitions, 5031 flow [2024-06-21 22:05:58,937 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) [2024-06-21 22:05:58,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:58,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:58,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 22:05:58,938 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)] === [2024-06-21 22:05:58,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1232003209, now seen corresponding path program 3 times [2024-06-21 22:05:58,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:58,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754513084] [2024-06-21 22:05:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:59,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754513084] [2024-06-21 22:05:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754513084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:59,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383777006] [2024-06-21 22:05:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:59,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:59,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:05:59,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 346 transitions, 5031 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) [2024-06-21 22:05:59,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:59,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:05:59,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:01,031 INFO L124 PetriNetUnfolderBase]: 3703/5639 cut-off events. [2024-06-21 22:06:01,031 INFO L125 PetriNetUnfolderBase]: For 270553/270553 co-relation queries the response was YES. [2024-06-21 22:06:01,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42320 conditions, 5639 events. 3703/5639 cut-off events. For 270553/270553 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30744 event pairs, 1020 based on Foata normal form. 2/5640 useless extension candidates. Maximal degree in co-relation 42204. Up to 5596 conditions per place. [2024-06-21 22:06:01,083 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 342 selfloop transitions, 14 changer transitions 0/359 dead transitions. [2024-06-21 22:06:01,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 359 transitions, 5829 flow [2024-06-21 22:06:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:06:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:06:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 22:06:01,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2024-06-21 22:06:01,084 INFO L175 Difference]: Start difference. First operand has 240 places, 346 transitions, 5031 flow. Second operand 6 states and 95 transitions. [2024-06-21 22:06:01,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 359 transitions, 5829 flow [2024-06-21 22:06:01,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 359 transitions, 5718 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 22:06:01,778 INFO L231 Difference]: Finished difference. Result has 242 places, 348 transitions, 5017 flow [2024-06-21 22:06:01,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5017, PETRI_PLACES=242, PETRI_TRANSITIONS=348} [2024-06-21 22:06:01,778 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 202 predicate places. [2024-06-21 22:06:01,778 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 348 transitions, 5017 flow [2024-06-21 22:06:01,778 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) [2024-06-21 22:06:01,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:01,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:01,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 22:06:01,779 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)] === [2024-06-21 22:06:01,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash 858485635, now seen corresponding path program 5 times [2024-06-21 22:06:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:01,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969849457] [2024-06-21 22:06:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:01,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:02,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969849457] [2024-06-21 22:06:02,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969849457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:02,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:02,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:02,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340617176] [2024-06-21 22:06:02,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:02,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:02,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:02,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:02,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:02,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:02,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 348 transitions, 5017 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) [2024-06-21 22:06:02,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:02,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:02,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:04,203 INFO L124 PetriNetUnfolderBase]: 3789/5758 cut-off events. [2024-06-21 22:06:04,203 INFO L125 PetriNetUnfolderBase]: For 279079/279089 co-relation queries the response was YES. [2024-06-21 22:06:04,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42879 conditions, 5758 events. 3789/5758 cut-off events. For 279079/279089 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31513 event pairs, 859 based on Foata normal form. 20/5777 useless extension candidates. Maximal degree in co-relation 42762. Up to 5176 conditions per place. [2024-06-21 22:06:04,251 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 319 selfloop transitions, 92 changer transitions 0/414 dead transitions. [2024-06-21 22:06:04,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 414 transitions, 6399 flow [2024-06-21 22:06:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 22:06:04,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-21 22:06:04,253 INFO L175 Difference]: Start difference. First operand has 242 places, 348 transitions, 5017 flow. Second operand 8 states and 157 transitions. [2024-06-21 22:06:04,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 414 transitions, 6399 flow [2024-06-21 22:06:05,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 414 transitions, 6318 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 22:06:05,156 INFO L231 Difference]: Finished difference. Result has 250 places, 374 transitions, 5708 flow [2024-06-21 22:06:05,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4940, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5708, PETRI_PLACES=250, PETRI_TRANSITIONS=374} [2024-06-21 22:06:05,157 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 210 predicate places. [2024-06-21 22:06:05,157 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 374 transitions, 5708 flow [2024-06-21 22:06:05,157 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) [2024-06-21 22:06:05,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:05,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:05,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 22:06:05,157 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:05,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:05,157 INFO L85 PathProgramCache]: Analyzing trace with hash 847434166, now seen corresponding path program 5 times [2024-06-21 22:06:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041592925] [2024-06-21 22:06:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:05,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:05,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041592925] [2024-06-21 22:06:05,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041592925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:05,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:05,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:05,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272295604] [2024-06-21 22:06:05,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:05,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:05,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:05,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:06,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:06,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 374 transitions, 5708 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) [2024-06-21 22:06:06,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:06,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:06,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:07,462 INFO L124 PetriNetUnfolderBase]: 4076/6215 cut-off events. [2024-06-21 22:06:07,463 INFO L125 PetriNetUnfolderBase]: For 412043/412053 co-relation queries the response was YES. [2024-06-21 22:06:07,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47877 conditions, 6215 events. 4076/6215 cut-off events. For 412043/412053 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34578 event pairs, 833 based on Foata normal form. 96/6310 useless extension candidates. Maximal degree in co-relation 47755. Up to 5042 conditions per place. [2024-06-21 22:06:07,531 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 346 selfloop transitions, 76 changer transitions 4/429 dead transitions. [2024-06-21 22:06:07,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 429 transitions, 6898 flow [2024-06-21 22:06:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 22:06:07,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50997150997151 [2024-06-21 22:06:07,533 INFO L175 Difference]: Start difference. First operand has 250 places, 374 transitions, 5708 flow. Second operand 9 states and 179 transitions. [2024-06-21 22:06:07,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 429 transitions, 6898 flow [2024-06-21 22:06:08,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 429 transitions, 6755 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-21 22:06:08,356 INFO L231 Difference]: Finished difference. Result has 257 places, 373 transitions, 5730 flow [2024-06-21 22:06:08,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5730, PETRI_PLACES=257, PETRI_TRANSITIONS=373} [2024-06-21 22:06:08,357 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 217 predicate places. [2024-06-21 22:06:08,357 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 373 transitions, 5730 flow [2024-06-21 22:06:08,357 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) [2024-06-21 22:06:08,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:08,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:08,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 22:06:08,358 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:08,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 847434445, now seen corresponding path program 6 times [2024-06-21 22:06:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:08,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213158536] [2024-06-21 22:06:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:09,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:09,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213158536] [2024-06-21 22:06:09,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213158536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:09,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:09,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:09,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623502022] [2024-06-21 22:06:09,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:09,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:09,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:09,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:09,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:09,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:09,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 373 transitions, 5730 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) [2024-06-21 22:06:09,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:09,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:09,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:10,628 INFO L124 PetriNetUnfolderBase]: 4044/6177 cut-off events. [2024-06-21 22:06:10,628 INFO L125 PetriNetUnfolderBase]: For 297420/297430 co-relation queries the response was YES. [2024-06-21 22:06:10,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47763 conditions, 6177 events. 4044/6177 cut-off events. For 297420/297430 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34457 event pairs, 956 based on Foata normal form. 14/6190 useless extension candidates. Maximal degree in co-relation 47639. Up to 5701 conditions per place. [2024-06-21 22:06:10,843 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 345 selfloop transitions, 75 changer transitions 1/424 dead transitions. [2024-06-21 22:06:10,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 424 transitions, 6858 flow [2024-06-21 22:06:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 22:06:10,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717948717948718 [2024-06-21 22:06:10,844 INFO L175 Difference]: Start difference. First operand has 257 places, 373 transitions, 5730 flow. Second operand 10 states and 184 transitions. [2024-06-21 22:06:10,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 424 transitions, 6858 flow [2024-06-21 22:06:11,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 424 transitions, 6686 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:11,528 INFO L231 Difference]: Finished difference. Result has 262 places, 380 transitions, 5861 flow [2024-06-21 22:06:11,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5861, PETRI_PLACES=262, PETRI_TRANSITIONS=380} [2024-06-21 22:06:11,529 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 222 predicate places. [2024-06-21 22:06:11,529 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 380 transitions, 5861 flow [2024-06-21 22:06:11,529 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) [2024-06-21 22:06:11,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:11,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:11,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 22:06:11,529 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:11,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1232009161, now seen corresponding path program 1 times [2024-06-21 22:06:11,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:11,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399760096] [2024-06-21 22:06:11,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:11,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:12,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:12,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399760096] [2024-06-21 22:06:12,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399760096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:12,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:12,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:12,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108085666] [2024-06-21 22:06:12,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:12,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:12,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:12,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:12,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:12,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 380 transitions, 5861 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) [2024-06-21 22:06:12,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:12,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:12,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:14,173 INFO L124 PetriNetUnfolderBase]: 4026/6153 cut-off events. [2024-06-21 22:06:14,173 INFO L125 PetriNetUnfolderBase]: For 288508/288508 co-relation queries the response was YES. [2024-06-21 22:06:14,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46954 conditions, 6153 events. 4026/6153 cut-off events. For 288508/288508 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34117 event pairs, 1128 based on Foata normal form. 8/6160 useless extension candidates. Maximal degree in co-relation 46828. Up to 5962 conditions per place. [2024-06-21 22:06:14,235 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 372 selfloop transitions, 32 changer transitions 0/407 dead transitions. [2024-06-21 22:06:14,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 407 transitions, 6843 flow [2024-06-21 22:06:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 22:06:14,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 22:06:14,236 INFO L175 Difference]: Start difference. First operand has 262 places, 380 transitions, 5861 flow. Second operand 7 states and 126 transitions. [2024-06-21 22:06:14,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 407 transitions, 6843 flow [2024-06-21 22:06:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 407 transitions, 6636 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:15,020 INFO L231 Difference]: Finished difference. Result has 262 places, 380 transitions, 5722 flow [2024-06-21 22:06:15,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5654, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5722, PETRI_PLACES=262, PETRI_TRANSITIONS=380} [2024-06-21 22:06:15,020 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 222 predicate places. [2024-06-21 22:06:15,020 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 380 transitions, 5722 flow [2024-06-21 22:06:15,021 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) [2024-06-21 22:06:15,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:15,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:15,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 22:06:15,021 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:15,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash -895660573, now seen corresponding path program 1 times [2024-06-21 22:06:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479204680] [2024-06-21 22:06:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:15,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:15,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:15,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479204680] [2024-06-21 22:06:15,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479204680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:15,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757972250] [2024-06-21 22:06:15,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:15,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:15,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:15,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 380 transitions, 5722 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) [2024-06-21 22:06:15,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:15,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:15,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:17,205 INFO L124 PetriNetUnfolderBase]: 4052/6191 cut-off events. [2024-06-21 22:06:17,205 INFO L125 PetriNetUnfolderBase]: For 287796/287799 co-relation queries the response was YES. [2024-06-21 22:06:17,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47058 conditions, 6191 events. 4052/6191 cut-off events. For 287796/287799 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34505 event pairs, 904 based on Foata normal form. 4/6194 useless extension candidates. Maximal degree in co-relation 46931. Up to 5515 conditions per place. [2024-06-21 22:06:17,279 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 300 selfloop transitions, 118 changer transitions 0/421 dead transitions. [2024-06-21 22:06:17,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 421 transitions, 7204 flow [2024-06-21 22:06:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:06:17,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 22:06:17,280 INFO L175 Difference]: Start difference. First operand has 262 places, 380 transitions, 5722 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:06:17,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 421 transitions, 7204 flow [2024-06-21 22:06:18,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 421 transitions, 7111 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:18,048 INFO L231 Difference]: Finished difference. Result has 264 places, 389 transitions, 6075 flow [2024-06-21 22:06:18,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5629, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6075, PETRI_PLACES=264, PETRI_TRANSITIONS=389} [2024-06-21 22:06:18,049 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 224 predicate places. [2024-06-21 22:06:18,049 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 389 transitions, 6075 flow [2024-06-21 22:06:18,049 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) [2024-06-21 22:06:18,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:18,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:18,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 22:06:18,049 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)] === [2024-06-21 22:06:18,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash 954811513, now seen corresponding path program 2 times [2024-06-21 22:06:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:18,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333531902] [2024-06-21 22:06:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:18,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:18,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333531902] [2024-06-21 22:06:18,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333531902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:18,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:18,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152148983] [2024-06-21 22:06:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:18,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:18,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:18,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:18,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:18,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 389 transitions, 6075 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) [2024-06-21 22:06:18,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:18,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:18,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:20,469 INFO L124 PetriNetUnfolderBase]: 4092/6244 cut-off events. [2024-06-21 22:06:20,470 INFO L125 PetriNetUnfolderBase]: For 309759/309771 co-relation queries the response was YES. [2024-06-21 22:06:20,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48422 conditions, 6244 events. 4092/6244 cut-off events. For 309759/309771 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 34847 event pairs, 865 based on Foata normal form. 18/6261 useless extension candidates. Maximal degree in co-relation 48295. Up to 5215 conditions per place. [2024-06-21 22:06:20,545 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 283 selfloop transitions, 162 changer transitions 0/448 dead transitions. [2024-06-21 22:06:20,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 448 transitions, 7536 flow [2024-06-21 22:06:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:06:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:06:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 22:06:20,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731934731934732 [2024-06-21 22:06:20,547 INFO L175 Difference]: Start difference. First operand has 264 places, 389 transitions, 6075 flow. Second operand 11 states and 203 transitions. [2024-06-21 22:06:20,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 448 transitions, 7536 flow [2024-06-21 22:06:21,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 448 transitions, 7281 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-21 22:06:21,291 INFO L231 Difference]: Finished difference. Result has 272 places, 398 transitions, 6398 flow [2024-06-21 22:06:21,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5880, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6398, PETRI_PLACES=272, PETRI_TRANSITIONS=398} [2024-06-21 22:06:21,291 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 232 predicate places. [2024-06-21 22:06:21,291 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 398 transitions, 6398 flow [2024-06-21 22:06:21,292 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) [2024-06-21 22:06:21,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:21,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:21,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:06:21,292 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)] === [2024-06-21 22:06:21,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1036741723, now seen corresponding path program 3 times [2024-06-21 22:06:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:21,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312403847] [2024-06-21 22:06:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:21,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:22,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312403847] [2024-06-21 22:06:22,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312403847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:22,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:22,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024071483] [2024-06-21 22:06:22,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:22,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:22,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 398 transitions, 6398 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:22,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:22,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:22,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:23,610 INFO L124 PetriNetUnfolderBase]: 4174/6358 cut-off events. [2024-06-21 22:06:23,610 INFO L125 PetriNetUnfolderBase]: For 321031/321033 co-relation queries the response was YES. [2024-06-21 22:06:23,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50879 conditions, 6358 events. 4174/6358 cut-off events. For 321031/321033 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35492 event pairs, 828 based on Foata normal form. 8/6365 useless extension candidates. Maximal degree in co-relation 50750. Up to 5482 conditions per place. [2024-06-21 22:06:23,676 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 318 selfloop transitions, 129 changer transitions 0/450 dead transitions. [2024-06-21 22:06:23,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 450 transitions, 7911 flow [2024-06-21 22:06:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:06:23,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-21 22:06:23,678 INFO L175 Difference]: Start difference. First operand has 272 places, 398 transitions, 6398 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:06:23,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 450 transitions, 7911 flow [2024-06-21 22:06:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 450 transitions, 7416 flow, removed 91 selfloop flow, removed 9 redundant places. [2024-06-21 22:06:24,426 INFO L231 Difference]: Finished difference. Result has 273 places, 410 transitions, 6500 flow [2024-06-21 22:06:24,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6500, PETRI_PLACES=273, PETRI_TRANSITIONS=410} [2024-06-21 22:06:24,426 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 233 predicate places. [2024-06-21 22:06:24,426 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 410 transitions, 6500 flow [2024-06-21 22:06:24,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:24,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:24,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:24,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:06:24,427 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)] === [2024-06-21 22:06:24,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash 321520569, now seen corresponding path program 1 times [2024-06-21 22:06:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:24,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666558413] [2024-06-21 22:06:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:24,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:25,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:25,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666558413] [2024-06-21 22:06:25,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666558413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:25,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:25,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:25,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188162922] [2024-06-21 22:06:25,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:25,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:25,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:25,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:25,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 410 transitions, 6500 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) [2024-06-21 22:06:25,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:25,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:26,848 INFO L124 PetriNetUnfolderBase]: 4416/6724 cut-off events. [2024-06-21 22:06:26,848 INFO L125 PetriNetUnfolderBase]: For 415804/415806 co-relation queries the response was YES. [2024-06-21 22:06:26,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55662 conditions, 6724 events. 4416/6724 cut-off events. For 415804/415806 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 37947 event pairs, 875 based on Foata normal form. 22/6745 useless extension candidates. Maximal degree in co-relation 55531. Up to 5626 conditions per place. [2024-06-21 22:06:26,936 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 342 selfloop transitions, 113 changer transitions 0/458 dead transitions. [2024-06-21 22:06:26,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 458 transitions, 7938 flow [2024-06-21 22:06:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 22:06:26,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 22:06:26,938 INFO L175 Difference]: Start difference. First operand has 273 places, 410 transitions, 6500 flow. Second operand 8 states and 153 transitions. [2024-06-21 22:06:26,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 458 transitions, 7938 flow [2024-06-21 22:06:28,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 458 transitions, 7622 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:28,341 INFO L231 Difference]: Finished difference. Result has 276 places, 414 transitions, 6519 flow [2024-06-21 22:06:28,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6184, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6519, PETRI_PLACES=276, PETRI_TRANSITIONS=414} [2024-06-21 22:06:28,341 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 236 predicate places. [2024-06-21 22:06:28,341 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 414 transitions, 6519 flow [2024-06-21 22:06:28,341 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) [2024-06-21 22:06:28,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:28,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:28,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:06:28,342 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)] === [2024-06-21 22:06:28,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1524129467, now seen corresponding path program 2 times [2024-06-21 22:06:28,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:28,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539826789] [2024-06-21 22:06:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:28,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:29,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539826789] [2024-06-21 22:06:29,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539826789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:29,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:29,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:06:29,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500306577] [2024-06-21 22:06:29,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:29,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:06:29,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:06:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:06:29,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:29,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 414 transitions, 6519 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) [2024-06-21 22:06:29,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:29,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:29,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:30,851 INFO L124 PetriNetUnfolderBase]: 4520/6884 cut-off events. [2024-06-21 22:06:30,851 INFO L125 PetriNetUnfolderBase]: For 448134/448136 co-relation queries the response was YES. [2024-06-21 22:06:30,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57513 conditions, 6884 events. 4520/6884 cut-off events. For 448134/448136 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39060 event pairs, 892 based on Foata normal form. 30/6913 useless extension candidates. Maximal degree in co-relation 57380. Up to 6028 conditions per place. [2024-06-21 22:06:30,938 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 341 selfloop transitions, 110 changer transitions 0/454 dead transitions. [2024-06-21 22:06:30,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 454 transitions, 7745 flow [2024-06-21 22:06:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 22:06:30,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 22:06:30,939 INFO L175 Difference]: Start difference. First operand has 276 places, 414 transitions, 6519 flow. Second operand 8 states and 148 transitions. [2024-06-21 22:06:30,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 454 transitions, 7745 flow [2024-06-21 22:06:31,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 454 transitions, 7549 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 22:06:31,854 INFO L231 Difference]: Finished difference. Result has 280 places, 416 transitions, 6608 flow [2024-06-21 22:06:31,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6608, PETRI_PLACES=280, PETRI_TRANSITIONS=416} [2024-06-21 22:06:31,854 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 240 predicate places. [2024-06-21 22:06:31,854 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 416 transitions, 6608 flow [2024-06-21 22:06:31,854 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) [2024-06-21 22:06:31,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:31,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:06:31,855 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)] === [2024-06-21 22:06:31,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash 324371577, now seen corresponding path program 4 times [2024-06-21 22:06:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:31,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690658024] [2024-06-21 22:06:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:31,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:32,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:32,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690658024] [2024-06-21 22:06:32,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690658024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:32,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:32,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:32,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013336606] [2024-06-21 22:06:32,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:32,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:32,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:32,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:32,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 416 transitions, 6608 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) [2024-06-21 22:06:32,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:32,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:32,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:34,181 INFO L124 PetriNetUnfolderBase]: 4550/6926 cut-off events. [2024-06-21 22:06:34,182 INFO L125 PetriNetUnfolderBase]: For 414087/414089 co-relation queries the response was YES. [2024-06-21 22:06:34,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57867 conditions, 6926 events. 4550/6926 cut-off events. For 414087/414089 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 39349 event pairs, 899 based on Foata normal form. 8/6933 useless extension candidates. Maximal degree in co-relation 57732. Up to 6166 conditions per place. [2024-06-21 22:06:34,268 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 342 selfloop transitions, 114 changer transitions 0/459 dead transitions. [2024-06-21 22:06:34,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 459 transitions, 7855 flow [2024-06-21 22:06:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:34,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 22:06:34,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45584045584045585 [2024-06-21 22:06:34,269 INFO L175 Difference]: Start difference. First operand has 280 places, 416 transitions, 6608 flow. Second operand 9 states and 160 transitions. [2024-06-21 22:06:34,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 459 transitions, 7855 flow [2024-06-21 22:06:35,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 459 transitions, 7620 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:35,492 INFO L231 Difference]: Finished difference. Result has 283 places, 422 transitions, 6742 flow [2024-06-21 22:06:35,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6742, PETRI_PLACES=283, PETRI_TRANSITIONS=422} [2024-06-21 22:06:35,492 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 243 predicate places. [2024-06-21 22:06:35,492 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 422 transitions, 6742 flow [2024-06-21 22:06:35,492 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) [2024-06-21 22:06:35,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:35,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:35,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:06:35,493 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:06:35,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1240402653, now seen corresponding path program 3 times [2024-06-21 22:06:35,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:35,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742560900] [2024-06-21 22:06:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:35,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:36,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:36,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742560900] [2024-06-21 22:06:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742560900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:36,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339888298] [2024-06-21 22:06:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:36,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:36,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:36,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 422 transitions, 6742 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) [2024-06-21 22:06:36,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:36,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:36,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:38,171 INFO L124 PetriNetUnfolderBase]: 4772/7259 cut-off events. [2024-06-21 22:06:38,172 INFO L125 PetriNetUnfolderBase]: For 471644/471644 co-relation queries the response was YES. [2024-06-21 22:06:38,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60304 conditions, 7259 events. 4772/7259 cut-off events. For 471644/471644 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41562 event pairs, 1315 based on Foata normal form. 28/7286 useless extension candidates. Maximal degree in co-relation 60168. Up to 6984 conditions per place. [2024-06-21 22:06:38,261 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 434 selfloop transitions, 39 changer transitions 0/476 dead transitions. [2024-06-21 22:06:38,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 476 transitions, 8241 flow [2024-06-21 22:06:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 22:06:38,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128205128205128 [2024-06-21 22:06:38,262 INFO L175 Difference]: Start difference. First operand has 283 places, 422 transitions, 6742 flow. Second operand 10 states and 161 transitions. [2024-06-21 22:06:38,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 476 transitions, 8241 flow [2024-06-21 22:06:39,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 476 transitions, 7925 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:39,516 INFO L231 Difference]: Finished difference. Result has 290 places, 445 transitions, 6939 flow [2024-06-21 22:06:39,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6464, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6939, PETRI_PLACES=290, PETRI_TRANSITIONS=445} [2024-06-21 22:06:39,516 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 250 predicate places. [2024-06-21 22:06:39,516 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 445 transitions, 6939 flow [2024-06-21 22:06:39,516 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) [2024-06-21 22:06:39,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:39,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:39,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:06:39,517 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)] === [2024-06-21 22:06:39,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1244127675, now seen corresponding path program 5 times [2024-06-21 22:06:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:39,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439320473] [2024-06-21 22:06:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:40,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:40,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439320473] [2024-06-21 22:06:40,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439320473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:40,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:40,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:40,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589551529] [2024-06-21 22:06:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:40,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:40,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:40,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 445 transitions, 6939 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) [2024-06-21 22:06:40,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:40,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:40,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:42,206 INFO L124 PetriNetUnfolderBase]: 4802/7293 cut-off events. [2024-06-21 22:06:42,206 INFO L125 PetriNetUnfolderBase]: For 437508/437518 co-relation queries the response was YES. [2024-06-21 22:06:42,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60535 conditions, 7293 events. 4802/7293 cut-off events. For 437508/437518 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 41694 event pairs, 1265 based on Foata normal form. 14/7306 useless extension candidates. Maximal degree in co-relation 60394. Up to 6995 conditions per place. [2024-06-21 22:06:42,291 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 408 selfloop transitions, 65 changer transitions 0/476 dead transitions. [2024-06-21 22:06:42,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 476 transitions, 8075 flow [2024-06-21 22:06:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:42,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:06:42,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301994301994302 [2024-06-21 22:06:42,292 INFO L175 Difference]: Start difference. First operand has 290 places, 445 transitions, 6939 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:06:42,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 476 transitions, 8075 flow [2024-06-21 22:06:43,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 476 transitions, 8002 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:43,562 INFO L231 Difference]: Finished difference. Result has 294 places, 451 transitions, 7112 flow [2024-06-21 22:06:43,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7112, PETRI_PLACES=294, PETRI_TRANSITIONS=451} [2024-06-21 22:06:43,563 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 254 predicate places. [2024-06-21 22:06:43,563 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 451 transitions, 7112 flow [2024-06-21 22:06:43,563 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) [2024-06-21 22:06:43,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:43,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:43,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:06:43,563 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)] === [2024-06-21 22:06:43,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:43,563 INFO L85 PathProgramCache]: Analyzing trace with hash 601492601, now seen corresponding path program 6 times [2024-06-21 22:06:43,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:43,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106465190] [2024-06-21 22:06:43,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:43,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:44,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:44,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106465190] [2024-06-21 22:06:44,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106465190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:44,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:44,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:44,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588436924] [2024-06-21 22:06:44,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:44,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:44,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:44,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:44,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 451 transitions, 7112 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:44,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:44,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:46,245 INFO L124 PetriNetUnfolderBase]: 4832/7335 cut-off events. [2024-06-21 22:06:46,245 INFO L125 PetriNetUnfolderBase]: For 447704/447714 co-relation queries the response was YES. [2024-06-21 22:06:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60911 conditions, 7335 events. 4832/7335 cut-off events. For 447704/447714 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 41949 event pairs, 1247 based on Foata normal form. 14/7348 useless extension candidates. Maximal degree in co-relation 60770. Up to 6942 conditions per place. [2024-06-21 22:06:46,329 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 401 selfloop transitions, 81 changer transitions 0/485 dead transitions. [2024-06-21 22:06:46,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 485 transitions, 8312 flow [2024-06-21 22:06:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 22:06:46,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282051282051282 [2024-06-21 22:06:46,330 INFO L175 Difference]: Start difference. First operand has 294 places, 451 transitions, 7112 flow. Second operand 10 states and 167 transitions. [2024-06-21 22:06:46,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 485 transitions, 8312 flow [2024-06-21 22:06:47,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 485 transitions, 8142 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 22:06:47,651 INFO L231 Difference]: Finished difference. Result has 297 places, 457 transitions, 7259 flow [2024-06-21 22:06:47,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=6942, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7259, PETRI_PLACES=297, PETRI_TRANSITIONS=457} [2024-06-21 22:06:47,652 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 257 predicate places. [2024-06-21 22:06:47,652 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 457 transitions, 7259 flow [2024-06-21 22:06:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:47,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:47,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:47,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:06:47,653 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)] === [2024-06-21 22:06:47,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash -897387459, now seen corresponding path program 1 times [2024-06-21 22:06:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:47,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574715645] [2024-06-21 22:06:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:48,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:48,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574715645] [2024-06-21 22:06:48,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574715645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:48,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:48,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:06:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489078449] [2024-06-21 22:06:48,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:06:48,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:06:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:06:49,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:49,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 457 transitions, 7259 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:06:49,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:49,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:49,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:51,355 INFO L124 PetriNetUnfolderBase]: 5715/8741 cut-off events. [2024-06-21 22:06:51,356 INFO L125 PetriNetUnfolderBase]: For 827806/827818 co-relation queries the response was YES. [2024-06-21 22:06:51,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78284 conditions, 8741 events. 5715/8741 cut-off events. For 827806/827818 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 51931 event pairs, 1074 based on Foata normal form. 66/8806 useless extension candidates. Maximal degree in co-relation 78142. Up to 4280 conditions per place. [2024-06-21 22:06:51,470 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 328 selfloop transitions, 200 changer transitions 5/536 dead transitions. [2024-06-21 22:06:51,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 536 transitions, 9439 flow [2024-06-21 22:06:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:06:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:06:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 22:06:51,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2024-06-21 22:06:51,471 INFO L175 Difference]: Start difference. First operand has 297 places, 457 transitions, 7259 flow. Second operand 10 states and 206 transitions. [2024-06-21 22:06:51,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 536 transitions, 9439 flow [2024-06-21 22:06:53,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 536 transitions, 9204 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:53,394 INFO L231 Difference]: Finished difference. Result has 300 places, 461 transitions, 7539 flow [2024-06-21 22:06:53,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7539, PETRI_PLACES=300, PETRI_TRANSITIONS=461} [2024-06-21 22:06:53,395 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 260 predicate places. [2024-06-21 22:06:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 461 transitions, 7539 flow [2024-06-21 22:06:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:06:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:53,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:06:53,396 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)] === [2024-06-21 22:06:53,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -890900709, now seen corresponding path program 2 times [2024-06-21 22:06:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:53,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717546278] [2024-06-21 22:06:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:54,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:54,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717546278] [2024-06-21 22:06:54,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717546278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:54,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:54,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:06:54,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892395453] [2024-06-21 22:06:54,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:54,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:06:54,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:54,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:06:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:06:54,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:06:54,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 461 transitions, 7539 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:06:54,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:54,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:06:54,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:57,072 INFO L124 PetriNetUnfolderBase]: 6156/9442 cut-off events. [2024-06-21 22:06:57,072 INFO L125 PetriNetUnfolderBase]: For 987568/987580 co-relation queries the response was YES. [2024-06-21 22:06:57,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87845 conditions, 9442 events. 6156/9442 cut-off events. For 987568/987580 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 57049 event pairs, 1507 based on Foata normal form. 66/9507 useless extension candidates. Maximal degree in co-relation 87701. Up to 6982 conditions per place. [2024-06-21 22:06:57,196 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 328 selfloop transitions, 192 changer transitions 5/528 dead transitions. [2024-06-21 22:06:57,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 528 transitions, 9402 flow [2024-06-21 22:06:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:06:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:06:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 22:06:57,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2024-06-21 22:06:57,198 INFO L175 Difference]: Start difference. First operand has 300 places, 461 transitions, 7539 flow. Second operand 11 states and 213 transitions. [2024-06-21 22:06:57,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 528 transitions, 9402 flow [2024-06-21 22:06:59,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 528 transitions, 9124 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:59,630 INFO L231 Difference]: Finished difference. Result has 307 places, 463 transitions, 7753 flow [2024-06-21 22:06:59,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7261, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7753, PETRI_PLACES=307, PETRI_TRANSITIONS=463} [2024-06-21 22:06:59,631 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 267 predicate places. [2024-06-21 22:06:59,631 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 463 transitions, 7753 flow [2024-06-21 22:06:59,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:06:59,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:59,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:59,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:06:59,631 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)] === [2024-06-21 22:06:59,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash -890892339, now seen corresponding path program 3 times [2024-06-21 22:06:59,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:59,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535422424] [2024-06-21 22:06:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:00,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:00,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535422424] [2024-06-21 22:07:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535422424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:00,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:00,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:07:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114684201] [2024-06-21 22:07:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:00,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:07:00,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:00,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:07:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:07:00,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:00,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 463 transitions, 7753 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:00,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:00,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:00,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:03,148 INFO L124 PetriNetUnfolderBase]: 6488/9971 cut-off events. [2024-06-21 22:07:03,148 INFO L125 PetriNetUnfolderBase]: For 1111574/1111587 co-relation queries the response was YES. [2024-06-21 22:07:03,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93011 conditions, 9971 events. 6488/9971 cut-off events. For 1111574/1111587 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 61132 event pairs, 1646 based on Foata normal form. 100/10070 useless extension candidates. Maximal degree in co-relation 92864. Up to 7850 conditions per place. [2024-06-21 22:07:03,289 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 249 selfloop transitions, 267 changer transitions 10/529 dead transitions. [2024-06-21 22:07:03,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 529 transitions, 9723 flow [2024-06-21 22:07:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:07:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:07:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 22:07:03,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948717948717949 [2024-06-21 22:07:03,291 INFO L175 Difference]: Start difference. First operand has 307 places, 463 transitions, 7753 flow. Second operand 10 states and 193 transitions. [2024-06-21 22:07:03,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 529 transitions, 9723 flow [2024-06-21 22:07:05,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 529 transitions, 9439 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:05,701 INFO L231 Difference]: Finished difference. Result has 313 places, 473 transitions, 8495 flow [2024-06-21 22:07:05,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=7473, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8495, PETRI_PLACES=313, PETRI_TRANSITIONS=473} [2024-06-21 22:07:05,701 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 273 predicate places. [2024-06-21 22:07:05,701 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 473 transitions, 8495 flow [2024-06-21 22:07:05,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:05,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:05,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:05,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:07:05,702 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)] === [2024-06-21 22:07:05,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash -661203729, now seen corresponding path program 4 times [2024-06-21 22:07:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:05,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623483439] [2024-06-21 22:07:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:05,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623483439] [2024-06-21 22:07:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623483439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:06,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:06,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 22:07:06,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591518868] [2024-06-21 22:07:06,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:06,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 22:07:06,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:06,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 22:07:06,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 22:07:06,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:06,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 473 transitions, 8495 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) [2024-06-21 22:07:06,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:06,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:06,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:09,379 INFO L124 PetriNetUnfolderBase]: 6480/9987 cut-off events. [2024-06-21 22:07:09,379 INFO L125 PetriNetUnfolderBase]: For 1135138/1135151 co-relation queries the response was YES. [2024-06-21 22:07:09,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96397 conditions, 9987 events. 6480/9987 cut-off events. For 1135138/1135151 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 61562 event pairs, 1672 based on Foata normal form. 100/10086 useless extension candidates. Maximal degree in co-relation 96245. Up to 8207 conditions per place. [2024-06-21 22:07:09,522 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 304 selfloop transitions, 225 changer transitions 4/536 dead transitions. [2024-06-21 22:07:09,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 536 transitions, 10668 flow [2024-06-21 22:07:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:07:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:07:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-21 22:07:09,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47086247086247085 [2024-06-21 22:07:09,524 INFO L175 Difference]: Start difference. First operand has 313 places, 473 transitions, 8495 flow. Second operand 11 states and 202 transitions. [2024-06-21 22:07:09,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 536 transitions, 10668 flow [2024-06-21 22:07:12,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 536 transitions, 10376 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:12,047 INFO L231 Difference]: Finished difference. Result has 322 places, 486 transitions, 9089 flow [2024-06-21 22:07:12,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8271, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9089, PETRI_PLACES=322, PETRI_TRANSITIONS=486} [2024-06-21 22:07:12,048 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 282 predicate places. [2024-06-21 22:07:12,048 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 486 transitions, 9089 flow [2024-06-21 22:07:12,048 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) [2024-06-21 22:07:12,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:12,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:12,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:07:12,048 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)] === [2024-06-21 22:07:12,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1233722959, now seen corresponding path program 1 times [2024-06-21 22:07:12,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:12,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505751303] [2024-06-21 22:07:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:12,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:13,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:13,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505751303] [2024-06-21 22:07:13,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505751303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:13,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:13,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:07:13,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149139997] [2024-06-21 22:07:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:07:13,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:13,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:07:13,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:07:13,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:13,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 486 transitions, 9089 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:13,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:13,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:13,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:15,942 INFO L124 PetriNetUnfolderBase]: 6820/10505 cut-off events. [2024-06-21 22:07:15,942 INFO L125 PetriNetUnfolderBase]: For 1117454/1117464 co-relation queries the response was YES. [2024-06-21 22:07:16,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104528 conditions, 10505 events. 6820/10505 cut-off events. For 1117454/1117464 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 65288 event pairs, 2317 based on Foata normal form. 22/10526 useless extension candidates. Maximal degree in co-relation 104372. Up to 9671 conditions per place. [2024-06-21 22:07:16,105 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 466 selfloop transitions, 63 changer transitions 0/532 dead transitions. [2024-06-21 22:07:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 532 transitions, 10773 flow [2024-06-21 22:07:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:07:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:07:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-21 22:07:16,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219114219114219 [2024-06-21 22:07:16,107 INFO L175 Difference]: Start difference. First operand has 322 places, 486 transitions, 9089 flow. Second operand 11 states and 181 transitions. [2024-06-21 22:07:16,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 532 transitions, 10773 flow [2024-06-21 22:07:19,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 532 transitions, 10373 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:19,360 INFO L231 Difference]: Finished difference. Result has 329 places, 494 transitions, 9055 flow [2024-06-21 22:07:19,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8689, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9055, PETRI_PLACES=329, PETRI_TRANSITIONS=494} [2024-06-21 22:07:19,361 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 289 predicate places. [2024-06-21 22:07:19,361 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 494 transitions, 9055 flow [2024-06-21 22:07:19,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:19,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:19,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:19,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:07:19,361 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)] === [2024-06-21 22:07:19,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:19,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1244211251, now seen corresponding path program 5 times [2024-06-21 22:07:19,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:19,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432849590] [2024-06-21 22:07:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:19,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432849590] [2024-06-21 22:07:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432849590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:20,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:20,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:07:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742165357] [2024-06-21 22:07:20,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:20,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:07:20,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:20,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:07:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:07:20,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:20,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 494 transitions, 9055 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:20,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:20,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:20,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:23,354 INFO L124 PetriNetUnfolderBase]: 7004/10801 cut-off events. [2024-06-21 22:07:23,354 INFO L125 PetriNetUnfolderBase]: For 1254218/1254228 co-relation queries the response was YES. [2024-06-21 22:07:23,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107444 conditions, 10801 events. 7004/10801 cut-off events. For 1254218/1254228 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 67490 event pairs, 2389 based on Foata normal form. 62/10862 useless extension candidates. Maximal degree in co-relation 107286. Up to 10122 conditions per place. [2024-06-21 22:07:23,514 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 452 selfloop transitions, 76 changer transitions 6/537 dead transitions. [2024-06-21 22:07:23,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 537 transitions, 10464 flow [2024-06-21 22:07:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:07:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:07:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 22:07:23,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42735042735042733 [2024-06-21 22:07:23,516 INFO L175 Difference]: Start difference. First operand has 329 places, 494 transitions, 9055 flow. Second operand 12 states and 200 transitions. [2024-06-21 22:07:23,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 537 transitions, 10464 flow [2024-06-21 22:07:26,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 537 transitions, 10345 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 22:07:26,953 INFO L231 Difference]: Finished difference. Result has 334 places, 496 transitions, 9181 flow [2024-06-21 22:07:26,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8936, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9181, PETRI_PLACES=334, PETRI_TRANSITIONS=496} [2024-06-21 22:07:26,954 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 294 predicate places. [2024-06-21 22:07:26,954 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 496 transitions, 9181 flow [2024-06-21 22:07:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:26,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:26,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:07:26,954 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)] === [2024-06-21 22:07:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 601490865, now seen corresponding path program 6 times [2024-06-21 22:07:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:26,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919727360] [2024-06-21 22:07:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:28,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:28,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919727360] [2024-06-21 22:07:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919727360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:28,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:28,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:07:28,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387332847] [2024-06-21 22:07:28,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:28,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:07:28,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:07:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:07:28,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:28,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 496 transitions, 9181 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:28,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:28,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:28,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:32,158 INFO L124 PetriNetUnfolderBase]: 7224/11169 cut-off events. [2024-06-21 22:07:32,170 INFO L125 PetriNetUnfolderBase]: For 1274302/1274312 co-relation queries the response was YES. [2024-06-21 22:07:32,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110195 conditions, 11169 events. 7224/11169 cut-off events. For 1274302/1274312 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 70352 event pairs, 2409 based on Foata normal form. 56/11224 useless extension candidates. Maximal degree in co-relation 110035. Up to 9979 conditions per place. [2024-06-21 22:07:32,308 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 445 selfloop transitions, 84 changer transitions 9/541 dead transitions. [2024-06-21 22:07:32,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 541 transitions, 10661 flow [2024-06-21 22:07:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:07:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:07:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 22:07:32,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44522144522144524 [2024-06-21 22:07:32,309 INFO L175 Difference]: Start difference. First operand has 334 places, 496 transitions, 9181 flow. Second operand 11 states and 191 transitions. [2024-06-21 22:07:32,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 541 transitions, 10661 flow [2024-06-21 22:07:36,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 541 transitions, 10480 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 22:07:36,102 INFO L231 Difference]: Finished difference. Result has 336 places, 497 transitions, 9227 flow [2024-06-21 22:07:36,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9000, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9227, PETRI_PLACES=336, PETRI_TRANSITIONS=497} [2024-06-21 22:07:36,103 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 296 predicate places. [2024-06-21 22:07:36,103 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 497 transitions, 9227 flow [2024-06-21 22:07:36,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-21 22:07:36,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:36,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:36,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:07:36,103 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)] === [2024-06-21 22:07:36,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 3705011, now seen corresponding path program 4 times [2024-06-21 22:07:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:36,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076952383] [2024-06-21 22:07:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:36,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:36,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076952383] [2024-06-21 22:07:36,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076952383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:36,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:36,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:07:36,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938910104] [2024-06-21 22:07:36,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:36,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:07:36,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:07:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:07:37,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:37,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 497 transitions, 9227 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) [2024-06-21 22:07:37,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:37,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:37,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:40,445 INFO L124 PetriNetUnfolderBase]: 7307/11300 cut-off events. [2024-06-21 22:07:40,445 INFO L125 PetriNetUnfolderBase]: For 1247078/1247078 co-relation queries the response was YES. [2024-06-21 22:07:40,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112663 conditions, 11300 events. 7307/11300 cut-off events. For 1247078/1247078 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 71626 event pairs, 2788 based on Foata normal form. 10/11309 useless extension candidates. Maximal degree in co-relation 112501. Up to 11003 conditions per place. [2024-06-21 22:07:40,727 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 496 selfloop transitions, 36 changer transitions 0/535 dead transitions. [2024-06-21 22:07:40,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 535 transitions, 10772 flow [2024-06-21 22:07:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:07:40,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 22:07:40,728 INFO L175 Difference]: Start difference. First operand has 336 places, 497 transitions, 9227 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:07:40,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 535 transitions, 10772 flow [2024-06-21 22:07:44,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 535 transitions, 10465 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 22:07:44,583 INFO L231 Difference]: Finished difference. Result has 334 places, 499 transitions, 9062 flow [2024-06-21 22:07:44,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8920, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9062, PETRI_PLACES=334, PETRI_TRANSITIONS=499} [2024-06-21 22:07:44,583 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 294 predicate places. [2024-06-21 22:07:44,583 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 499 transitions, 9062 flow [2024-06-21 22:07:44,583 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) [2024-06-21 22:07:44,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:44,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:07:44,584 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:44,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1541681781, now seen corresponding path program 5 times [2024-06-21 22:07:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:44,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739362689] [2024-06-21 22:07:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:44,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:45,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739362689] [2024-06-21 22:07:45,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739362689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:45,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:45,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:45,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926997636] [2024-06-21 22:07:45,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:45,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:45,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:45,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:45,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 499 transitions, 9062 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) [2024-06-21 22:07:45,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:45,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:45,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:48,791 INFO L124 PetriNetUnfolderBase]: 7359/11380 cut-off events. [2024-06-21 22:07:48,791 INFO L125 PetriNetUnfolderBase]: For 1285745/1285745 co-relation queries the response was YES. [2024-06-21 22:07:48,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113441 conditions, 11380 events. 7359/11380 cut-off events. For 1285745/1285745 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 72170 event pairs, 2810 based on Foata normal form. 14/11393 useless extension candidates. Maximal degree in co-relation 113278. Up to 11194 conditions per place. [2024-06-21 22:07:49,146 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 493 selfloop transitions, 34 changer transitions 0/530 dead transitions. [2024-06-21 22:07:49,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 530 transitions, 10369 flow [2024-06-21 22:07:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:07:49,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-21 22:07:49,148 INFO L175 Difference]: Start difference. First operand has 334 places, 499 transitions, 9062 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:07:49,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 530 transitions, 10369 flow [2024-06-21 22:07:52,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 530 transitions, 10277 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:52,533 INFO L231 Difference]: Finished difference. Result has 338 places, 500 transitions, 9080 flow [2024-06-21 22:07:52,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9080, PETRI_PLACES=338, PETRI_TRANSITIONS=500} [2024-06-21 22:07:52,533 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 298 predicate places. [2024-06-21 22:07:52,534 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 500 transitions, 9080 flow [2024-06-21 22:07:52,534 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) [2024-06-21 22:07:52,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:52,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:52,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:07:52,534 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:07:52,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1164217435, now seen corresponding path program 7 times [2024-06-21 22:07:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:52,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722979518] [2024-06-21 22:07:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:52,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:53,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722979518] [2024-06-21 22:07:53,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722979518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:53,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:53,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:07:53,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953127265] [2024-06-21 22:07:53,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:53,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:07:53,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:53,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:07:53,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:07:53,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:07:53,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 500 transitions, 9080 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) [2024-06-21 22:07:53,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:53,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:07:53,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:56,677 INFO L124 PetriNetUnfolderBase]: 7389/11422 cut-off events. [2024-06-21 22:07:56,678 INFO L125 PetriNetUnfolderBase]: For 1285390/1285390 co-relation queries the response was YES. [2024-06-21 22:07:56,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113737 conditions, 11422 events. 7389/11422 cut-off events. For 1285390/1285390 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 72404 event pairs, 2812 based on Foata normal form. 6/11427 useless extension candidates. Maximal degree in co-relation 113572. Up to 11238 conditions per place. [2024-06-21 22:07:56,845 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 488 selfloop transitions, 44 changer transitions 0/535 dead transitions. [2024-06-21 22:07:56,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 535 transitions, 10451 flow [2024-06-21 22:07:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 22:07:56,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42450142450142453 [2024-06-21 22:07:56,847 INFO L175 Difference]: Start difference. First operand has 338 places, 500 transitions, 9080 flow. Second operand 9 states and 149 transitions. [2024-06-21 22:07:56,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 535 transitions, 10451 flow [2024-06-21 22:08:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 535 transitions, 10377 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:00,705 INFO L231 Difference]: Finished difference. Result has 341 places, 506 transitions, 9272 flow [2024-06-21 22:08:00,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9006, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9272, PETRI_PLACES=341, PETRI_TRANSITIONS=506} [2024-06-21 22:08:00,706 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 301 predicate places. [2024-06-21 22:08:00,706 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 506 transitions, 9272 flow [2024-06-21 22:08:00,706 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) [2024-06-21 22:08:00,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:00,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:00,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:08:00,706 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:00,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1366347699, now seen corresponding path program 6 times [2024-06-21 22:08:00,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:00,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683861579] [2024-06-21 22:08:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:00,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:01,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:01,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683861579] [2024-06-21 22:08:01,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683861579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:01,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:01,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:08:01,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476810029] [2024-06-21 22:08:01,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:01,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:08:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:08:01,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:08:01,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:08:01,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 506 transitions, 9272 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) [2024-06-21 22:08:01,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:01,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:08:01,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:05,139 INFO L124 PetriNetUnfolderBase]: 7510/11605 cut-off events. [2024-06-21 22:08:05,139 INFO L125 PetriNetUnfolderBase]: For 1372835/1372835 co-relation queries the response was YES. [2024-06-21 22:08:05,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116905 conditions, 11605 events. 7510/11605 cut-off events. For 1372835/1372835 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 73749 event pairs, 2810 based on Foata normal form. 10/11614 useless extension candidates. Maximal degree in co-relation 116739. Up to 10938 conditions per place. [2024-06-21 22:08:05,292 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 465 selfloop transitions, 78 changer transitions 0/546 dead transitions. [2024-06-21 22:08:05,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 546 transitions, 10863 flow [2024-06-21 22:08:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:08:05,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 22:08:05,293 INFO L175 Difference]: Start difference. First operand has 341 places, 506 transitions, 9272 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:08:05,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 546 transitions, 10863 flow [2024-06-21 22:08:09,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 546 transitions, 10713 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:09,413 INFO L231 Difference]: Finished difference. Result has 342 places, 508 transitions, 9354 flow [2024-06-21 22:08:09,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9122, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9354, PETRI_PLACES=342, PETRI_TRANSITIONS=508} [2024-06-21 22:08:09,414 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 302 predicate places. [2024-06-21 22:08:09,414 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 508 transitions, 9354 flow [2024-06-21 22:08:09,414 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) [2024-06-21 22:08:09,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:09,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:08:09,415 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:09,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:09,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1374813788, now seen corresponding path program 1 times [2024-06-21 22:08:09,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:09,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660260638] [2024-06-21 22:08:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:09,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:10,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:10,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660260638] [2024-06-21 22:08:10,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660260638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:10,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026207724] [2024-06-21 22:08:10,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:10,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:10,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:08:10,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 508 transitions, 9354 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:10,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:10,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:08:10,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:13,583 INFO L124 PetriNetUnfolderBase]: 7501/11593 cut-off events. [2024-06-21 22:08:13,583 INFO L125 PetriNetUnfolderBase]: For 1372038/1372051 co-relation queries the response was YES. [2024-06-21 22:08:13,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117120 conditions, 11593 events. 7501/11593 cut-off events. For 1372038/1372051 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 73680 event pairs, 2082 based on Foata normal form. 13/11605 useless extension candidates. Maximal degree in co-relation 116953. Up to 10447 conditions per place. [2024-06-21 22:08:13,740 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 333 selfloop transitions, 203 changer transitions 0/539 dead transitions. [2024-06-21 22:08:13,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 539 transitions, 10714 flow [2024-06-21 22:08:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 22:08:13,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018315018315018 [2024-06-21 22:08:13,741 INFO L175 Difference]: Start difference. First operand has 342 places, 508 transitions, 9354 flow. Second operand 7 states and 137 transitions. [2024-06-21 22:08:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 539 transitions, 10714 flow [2024-06-21 22:08:18,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 539 transitions, 10542 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:18,409 INFO L231 Difference]: Finished difference. Result has 344 places, 508 transitions, 9606 flow [2024-06-21 22:08:18,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9184, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9606, PETRI_PLACES=344, PETRI_TRANSITIONS=508} [2024-06-21 22:08:18,410 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 304 predicate places. [2024-06-21 22:08:18,410 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 508 transitions, 9606 flow [2024-06-21 22:08:18,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:18,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:18,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:08:18,411 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:18,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1884270747, now seen corresponding path program 7 times [2024-06-21 22:08:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:18,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669688217] [2024-06-21 22:08:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669688217] [2024-06-21 22:08:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669688217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:19,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:19,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566800695] [2024-06-21 22:08:19,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:19,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:08:19,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 508 transitions, 9606 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) [2024-06-21 22:08:19,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:19,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:08:19,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:23,130 INFO L124 PetriNetUnfolderBase]: 7681/11869 cut-off events. [2024-06-21 22:08:23,130 INFO L125 PetriNetUnfolderBase]: For 1436979/1436979 co-relation queries the response was YES. [2024-06-21 22:08:23,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120604 conditions, 11869 events. 7681/11869 cut-off events. For 1436979/1436979 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 75805 event pairs, 2846 based on Foata normal form. 10/11878 useless extension candidates. Maximal degree in co-relation 120436. Up to 11438 conditions per place. [2024-06-21 22:08:23,319 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 510 selfloop transitions, 41 changer transitions 0/554 dead transitions. [2024-06-21 22:08:23,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 554 transitions, 11320 flow [2024-06-21 22:08:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 22:08:23,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 22:08:23,320 INFO L175 Difference]: Start difference. First operand has 344 places, 508 transitions, 9606 flow. Second operand 8 states and 148 transitions. [2024-06-21 22:08:23,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 554 transitions, 11320 flow [2024-06-21 22:08:27,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 554 transitions, 10902 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:27,324 INFO L231 Difference]: Finished difference. Result has 346 places, 516 transitions, 9441 flow [2024-06-21 22:08:27,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9190, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9441, PETRI_PLACES=346, PETRI_TRANSITIONS=516} [2024-06-21 22:08:27,325 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 306 predicate places. [2024-06-21 22:08:27,325 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 516 transitions, 9441 flow [2024-06-21 22:08:27,325 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) [2024-06-21 22:08:27,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:27,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:27,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:08:27,325 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:27,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:27,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1739872443, now seen corresponding path program 8 times [2024-06-21 22:08:27,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:27,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655391996] [2024-06-21 22:08:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:27,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:28,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:28,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655391996] [2024-06-21 22:08:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655391996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:28,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:28,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:08:28,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276458305] [2024-06-21 22:08:28,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:28,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:08:28,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:08:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:08:28,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:08:28,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 516 transitions, 9441 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) [2024-06-21 22:08:28,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:28,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:08:28,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:31,991 INFO L124 PetriNetUnfolderBase]: 7717/11925 cut-off events. [2024-06-21 22:08:31,991 INFO L125 PetriNetUnfolderBase]: For 1444364/1444364 co-relation queries the response was YES. [2024-06-21 22:08:32,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122232 conditions, 11925 events. 7717/11925 cut-off events. For 1444364/1444364 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 76263 event pairs, 2826 based on Foata normal form. 10/11934 useless extension candidates. Maximal degree in co-relation 122063. Up to 11662 conditions per place. [2024-06-21 22:08:32,186 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 502 selfloop transitions, 41 changer transitions 0/546 dead transitions. [2024-06-21 22:08:32,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 546 transitions, 10796 flow [2024-06-21 22:08:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:08:32,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-06-21 22:08:32,187 INFO L175 Difference]: Start difference. First operand has 346 places, 516 transitions, 9441 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:08:32,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 546 transitions, 10796 flow [2024-06-21 22:08:36,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 546 transitions, 10649 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:36,307 INFO L231 Difference]: Finished difference. Result has 352 places, 518 transitions, 9445 flow [2024-06-21 22:08:36,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=9328, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9445, PETRI_PLACES=352, PETRI_TRANSITIONS=518} [2024-06-21 22:08:36,307 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 312 predicate places. [2024-06-21 22:08:36,307 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 518 transitions, 9445 flow [2024-06-21 22:08:36,308 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) [2024-06-21 22:08:36,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:36,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:36,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:08:36,308 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:36,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash -343855794, now seen corresponding path program 2 times [2024-06-21 22:08:36,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:36,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112229252] [2024-06-21 22:08:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:36,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:37,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:37,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112229252] [2024-06-21 22:08:37,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112229252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:37,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:37,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:08:37,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264074197] [2024-06-21 22:08:37,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:37,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:08:37,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:37,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:08:37,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:08:37,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2024-06-21 22:08:37,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 518 transitions, 9445 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) [2024-06-21 22:08:37,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:37,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2024-06-21 22:08:37,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:41,050 INFO L124 PetriNetUnfolderBase]: 7732/11946 cut-off events. [2024-06-21 22:08:41,050 INFO L125 PetriNetUnfolderBase]: For 1449108/1449108 co-relation queries the response was YES. [2024-06-21 22:08:41,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122159 conditions, 11946 events. 7732/11946 cut-off events. For 1449108/1449108 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 76459 event pairs, 2876 based on Foata normal form. 3/11948 useless extension candidates. Maximal degree in co-relation 121988. Up to 11642 conditions per place. [2024-06-21 22:08:41,233 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 467 selfloop transitions, 81 changer transitions 0/551 dead transitions. [2024-06-21 22:08:41,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 551 transitions, 10853 flow [2024-06-21 22:08:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:08:41,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 22:08:41,234 INFO L175 Difference]: Start difference. First operand has 352 places, 518 transitions, 9445 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:08:41,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 551 transitions, 10853 flow