./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:29:54,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:29:54,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:29:54,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:29:54,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:29:54,395 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:29:54,396 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:29:54,396 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:29:54,396 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:29:54,399 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:29:54,399 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:29:54,400 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:29:54,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:29:54,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:29:54,401 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:29:54,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:29:54,402 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:29:54,402 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:29:54,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:29:54,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:29:54,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:29:54,402 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:29:54,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:29:54,403 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:29:54,403 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:29:54,403 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:29:54,403 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:29:54,403 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:29:54,404 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:29:54,404 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:29:54,405 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:29:54,405 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:29:54,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:29:54,405 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:29:54,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:29:54,405 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:29:54,405 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:29:54,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:29:54,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:29:54,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:29:54,406 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:29:54,406 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:29:54,406 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:29:54,406 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:29:54,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:29:54,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:29:54,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:29:54,635 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:29:54,635 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:29:54,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 04:29:55,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:29:55,835 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:29:55,836 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 04:29:55,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ee924ce/181d03966cc644969197dd0ccc29789f/FLAG4c7025aac [2024-06-28 04:29:55,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5ee924ce/181d03966cc644969197dd0ccc29789f [2024-06-28 04:29:55,866 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:29:55,866 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:29:55,868 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-28 04:29:55,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:29:55,978 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:29:55,984 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:29:55,985 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:29:55,989 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:29:55,989 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:29:55" (1/2) ... [2024-06-28 04:29:55,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@801a652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:29:55, skipping insertion in model container [2024-06-28 04:29:55,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:29:55" (1/2) ... [2024-06-28 04:29:55,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fdf66bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:29:55, skipping insertion in model container [2024-06-28 04:29:55,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:29:55" (2/2) ... [2024-06-28 04:29:55,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@801a652 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:55, skipping insertion in model container [2024-06-28 04:29:55,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:29:55" (2/2) ... [2024-06-28 04:29:55,998 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:29:56,125 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:29:56,126 INFO L97 edCorrectnessWitness]: Location invariant before [L822-L822] (((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)) && (z$w_buff1 == 0 || z$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2)) [2024-06-28 04:29:56,126 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)) && (z$w_buff1 == 0 || z$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2)) [2024-06-28 04:29:56,126 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] (((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)) && (z$w_buff1 == 0 || z$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2)) [2024-06-28 04:29:56,127 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:29:56,127 INFO L106 edCorrectnessWitness]: ghost_update [L817-L817] multithreaded = 1; [2024-06-28 04:29:56,166 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:29:56,477 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:29:56,485 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:29:56,591 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:29:56,626 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:29:56,626 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56 WrapperNode [2024-06-28 04:29:56,626 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:29:56,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:29:56,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:29:56,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:29:56,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,677 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 142 [2024-06-28 04:29:56,677 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:29:56,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:29:56,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:29:56,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:29:56,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,689 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,700 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 04:29:56,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,711 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:29:56,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:29:56,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:29:56,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:29:56,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (1/1) ... [2024-06-28 04:29:56,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:29:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:29:56,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 04:29:56,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 04:29:56,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:29:56,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:29:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:29:56,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:29:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:29:56,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:29:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:29:56,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:29:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:29:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:29:56,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:29:56,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:29:56,767 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 04:29:56,863 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:29:56,867 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:29:57,236 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:29:57,236 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:29:57,372 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:29:57,372 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:29:57,372 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:29:57 BoogieIcfgContainer [2024-06-28 04:29:57,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:29:57,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:29:57,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:29:57,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:29:57,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:29:55" (1/4) ... [2024-06-28 04:29:57,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8e4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:29:57, skipping insertion in model container [2024-06-28 04:29:57,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:29:55" (2/4) ... [2024-06-28 04:29:57,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8e4bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:29:57, skipping insertion in model container [2024-06-28 04:29:57,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:29:56" (3/4) ... [2024-06-28 04:29:57,406 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c8e4bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:29:57, skipping insertion in model container [2024-06-28 04:29:57,406 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:29:57" (4/4) ... [2024-06-28 04:29:57,407 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 04:29:57,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:29:57,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:29:57,435 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:29:57,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:29:57,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 04:29:57,518 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 04:29:57,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:29:57,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:29:57,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 04:29:57,523 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-28 04:29:57,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:29:57,539 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;@5e156ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:29:57,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:29:57,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:29:57,544 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 04:29:57,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:29:57,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:57,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:29:57,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:57,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:57,549 INFO L85 PathProgramCache]: Analyzing trace with hash 367698528, now seen corresponding path program 1 times [2024-06-28 04:29:57,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:57,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863902870] [2024-06-28 04:29:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:58,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:58,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863902870] [2024-06-28 04:29:58,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863902870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:58,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:58,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:29:58,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781760794] [2024-06-28 04:29:58,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:58,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:29:58,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:29:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:29:58,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 04:29:58,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:58,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:58,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 04:29:58,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:58,754 INFO L124 PetriNetUnfolderBase]: 1659/2477 cut-off events. [2024-06-28 04:29:58,754 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-28 04:29:58,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5041 conditions, 2477 events. 1659/2477 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11214 event pairs, 1184 based on Foata normal form. 1/2437 useless extension candidates. Maximal degree in co-relation 5029. Up to 2465 conditions per place. [2024-06-28 04:29:58,772 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-28 04:29:58,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 171 flow [2024-06-28 04:29:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:29:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:29:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-28 04:29:58,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-28 04:29:58,783 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 67 transitions. [2024-06-28 04:29:58,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 171 flow [2024-06-28 04:29:58,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:29:58,788 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-28 04:29:58,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-28 04:29:58,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-28 04:29:58,793 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-28 04:29:58,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:58,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:58,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:58,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:29:58,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:58,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:58,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1170999743, now seen corresponding path program 1 times [2024-06-28 04:29:58,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:58,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535966277] [2024-06-28 04:29:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:58,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:29:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:29:59,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:29:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535966277] [2024-06-28 04:29:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535966277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:29:59,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:29:59,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:29:59,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773350259] [2024-06-28 04:29:59,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:29:59,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:29:59,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:29:59,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:29:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:29:59,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 04:29:59,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:59,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:29:59,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 04:29:59,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:29:59,613 INFO L124 PetriNetUnfolderBase]: 1653/2468 cut-off events. [2024-06-28 04:29:59,613 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-28 04:29:59,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5657 conditions, 2468 events. 1653/2468 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11186 event pairs, 1038 based on Foata normal form. 3/2470 useless extension candidates. Maximal degree in co-relation 5645. Up to 2441 conditions per place. [2024-06-28 04:29:59,641 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-28 04:29:59,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 238 flow [2024-06-28 04:29:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:29:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:29:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-28 04:29:59,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-28 04:29:59,643 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-28 04:29:59,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 238 flow [2024-06-28 04:29:59,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:29:59,645 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-28 04:29:59,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 04:29:59,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-28 04:29:59,646 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-28 04:29:59,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:29:59,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:29:59,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:29:59,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:29:59,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:29:59,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:29:59,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1941254745, now seen corresponding path program 1 times [2024-06-28 04:29:59,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:29:59,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878533278] [2024-06-28 04:29:59,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:29:59,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:29:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:00,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878533278] [2024-06-28 04:30:00,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878533278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:00,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:00,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 04:30:00,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707500418] [2024-06-28 04:30:00,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:00,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 04:30:00,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 04:30:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 04:30:00,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 04:30:00,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:00,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:00,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 04:30:00,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:00,381 INFO L124 PetriNetUnfolderBase]: 1661/2481 cut-off events. [2024-06-28 04:30:00,381 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-28 04:30:00,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6307 conditions, 2481 events. 1661/2481 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11214 event pairs, 812 based on Foata normal form. 5/2485 useless extension candidates. Maximal degree in co-relation 6293. Up to 2387 conditions per place. [2024-06-28 04:30:00,393 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-28 04:30:00,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 392 flow [2024-06-28 04:30:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:30:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:30:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-28 04:30:00,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-28 04:30:00,395 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 113 transitions. [2024-06-28 04:30:00,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 392 flow [2024-06-28 04:30:00,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 04:30:00,397 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 233 flow [2024-06-28 04:30:00,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-28 04:30:00,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-28 04:30:00,398 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 233 flow [2024-06-28 04:30:00,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:00,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:00,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:00,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:30:00,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:00,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash 187884212, now seen corresponding path program 1 times [2024-06-28 04:30:00,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:00,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639102604] [2024-06-28 04:30:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:00,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639102604] [2024-06-28 04:30:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639102604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:01,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:01,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:30:01,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466220678] [2024-06-28 04:30:01,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:01,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:30:01,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:30:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:30:01,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 04:30:01,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:01,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:01,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 04:30:01,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:01,453 INFO L124 PetriNetUnfolderBase]: 1669/2493 cut-off events. [2024-06-28 04:30:01,453 INFO L125 PetriNetUnfolderBase]: For 3034/3036 co-relation queries the response was YES. [2024-06-28 04:30:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7426 conditions, 2493 events. 1669/2493 cut-off events. For 3034/3036 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11279 event pairs, 666 based on Foata normal form. 7/2499 useless extension candidates. Maximal degree in co-relation 7409. Up to 2373 conditions per place. [2024-06-28 04:30:01,466 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-28 04:30:01,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 519 flow [2024-06-28 04:30:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-28 04:30:01,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-28 04:30:01,468 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 233 flow. Second operand 6 states and 133 transitions. [2024-06-28 04:30:01,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 519 flow [2024-06-28 04:30:01,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 511 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 04:30:01,472 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 306 flow [2024-06-28 04:30:01,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-28 04:30:01,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-28 04:30:01,473 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 306 flow [2024-06-28 04:30:01,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:01,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:01,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:01,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:30:01,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:01,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1530039064, now seen corresponding path program 1 times [2024-06-28 04:30:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:01,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041709618] [2024-06-28 04:30:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:02,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:02,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041709618] [2024-06-28 04:30:02,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041709618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:02,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:02,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:02,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612739353] [2024-06-28 04:30:02,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:02,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:02,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:02,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 04:30:02,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 306 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:02,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:02,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 04:30:02,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:02,490 INFO L124 PetriNetUnfolderBase]: 1681/2513 cut-off events. [2024-06-28 04:30:02,491 INFO L125 PetriNetUnfolderBase]: For 4782/4784 co-relation queries the response was YES. [2024-06-28 04:30:02,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8297 conditions, 2513 events. 1681/2513 cut-off events. For 4782/4784 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11388 event pairs, 502 based on Foata normal form. 12/2524 useless extension candidates. Maximal degree in co-relation 8277. Up to 2341 conditions per place. [2024-06-28 04:30:02,504 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 64 selfloop transitions, 23 changer transitions 0/91 dead transitions. [2024-06-28 04:30:02,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 620 flow [2024-06-28 04:30:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-28 04:30:02,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2024-06-28 04:30:02,506 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 306 flow. Second operand 7 states and 149 transitions. [2024-06-28 04:30:02,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 620 flow [2024-06-28 04:30:02,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 571 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:02,510 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 333 flow [2024-06-28 04:30:02,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=333, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-28 04:30:02,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-28 04:30:02,511 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 333 flow [2024-06-28 04:30:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:02,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:02,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:02,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:30:02,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:02,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash 945572823, now seen corresponding path program 1 times [2024-06-28 04:30:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:02,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760107710] [2024-06-28 04:30:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:02,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:02,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760107710] [2024-06-28 04:30:02,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760107710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:02,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:02,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:30:02,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098417942] [2024-06-28 04:30:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:02,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:30:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:30:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:30:02,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:02,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 333 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:02,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:02,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:02,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:03,254 INFO L124 PetriNetUnfolderBase]: 1676/2505 cut-off events. [2024-06-28 04:30:03,254 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-28 04:30:03,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8823 conditions, 2505 events. 1676/2505 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11316 event pairs, 659 based on Foata normal form. 2/2506 useless extension candidates. Maximal degree in co-relation 8801. Up to 2484 conditions per place. [2024-06-28 04:30:03,267 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 54 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-28 04:30:03,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 485 flow [2024-06-28 04:30:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:30:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:30:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-28 04:30:03,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.405 [2024-06-28 04:30:03,269 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 333 flow. Second operand 5 states and 81 transitions. [2024-06-28 04:30:03,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 485 flow [2024-06-28 04:30:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 421 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:03,273 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 293 flow [2024-06-28 04:30:03,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-28 04:30:03,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-28 04:30:03,274 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 293 flow [2024-06-28 04:30:03,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:03,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:03,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:03,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:30:03,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:03,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash -752531503, now seen corresponding path program 1 times [2024-06-28 04:30:03,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:03,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32478017] [2024-06-28 04:30:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:03,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:03,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32478017] [2024-06-28 04:30:03,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32478017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:03,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:03,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113812044] [2024-06-28 04:30:03,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:03,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:03,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:03,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:03,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:03,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:03,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 293 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:03,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:03,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:04,163 INFO L124 PetriNetUnfolderBase]: 1680/2511 cut-off events. [2024-06-28 04:30:04,164 INFO L125 PetriNetUnfolderBase]: For 7537/7537 co-relation queries the response was YES. [2024-06-28 04:30:04,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8825 conditions, 2511 events. 1680/2511 cut-off events. For 7537/7537 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11306 event pairs, 617 based on Foata normal form. 6/2516 useless extension candidates. Maximal degree in co-relation 8801. Up to 2442 conditions per place. [2024-06-28 04:30:04,177 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-28 04:30:04,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 585 flow [2024-06-28 04:30:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 04:30:04,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-28 04:30:04,179 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 293 flow. Second operand 6 states and 103 transitions. [2024-06-28 04:30:04,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 585 flow [2024-06-28 04:30:04,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 563 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:04,183 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 402 flow [2024-06-28 04:30:04,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-06-28 04:30:04,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-28 04:30:04,184 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 402 flow [2024-06-28 04:30:04,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:04,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:04,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:04,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:30:04,185 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:04,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1964610644, now seen corresponding path program 1 times [2024-06-28 04:30:04,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:04,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348151354] [2024-06-28 04:30:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:04,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:04,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:04,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348151354] [2024-06-28 04:30:04,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348151354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:04,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:04,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:04,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561893667] [2024-06-28 04:30:04,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:04,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:04,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:04,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:04,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:04,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:04,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 402 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:04,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:04,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:04,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:05,002 INFO L124 PetriNetUnfolderBase]: 1686/2521 cut-off events. [2024-06-28 04:30:05,002 INFO L125 PetriNetUnfolderBase]: For 10563/10567 co-relation queries the response was YES. [2024-06-28 04:30:05,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9820 conditions, 2521 events. 1686/2521 cut-off events. For 10563/10567 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11325 event pairs, 636 based on Foata normal form. 8/2528 useless extension candidates. Maximal degree in co-relation 9794. Up to 2424 conditions per place. [2024-06-28 04:30:05,016 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 66 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-28 04:30:05,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 88 transitions, 672 flow [2024-06-28 04:30:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 04:30:05,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-28 04:30:05,018 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 402 flow. Second operand 6 states and 104 transitions. [2024-06-28 04:30:05,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 88 transitions, 672 flow [2024-06-28 04:30:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 654 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 04:30:05,026 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 456 flow [2024-06-28 04:30:05,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-28 04:30:05,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-28 04:30:05,027 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 456 flow [2024-06-28 04:30:05,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:05,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:05,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:30:05,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:05,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1837242752, now seen corresponding path program 2 times [2024-06-28 04:30:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:05,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769100770] [2024-06-28 04:30:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:05,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769100770] [2024-06-28 04:30:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769100770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:05,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:05,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115484627] [2024-06-28 04:30:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:05,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:05,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:05,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:05,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:05,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:05,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:05,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:05,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:05,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:05,778 INFO L124 PetriNetUnfolderBase]: 1671/2495 cut-off events. [2024-06-28 04:30:05,778 INFO L125 PetriNetUnfolderBase]: For 11830/11830 co-relation queries the response was YES. [2024-06-28 04:30:05,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9921 conditions, 2495 events. 1671/2495 cut-off events. For 11830/11830 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11118 event pairs, 632 based on Foata normal form. 2/2496 useless extension candidates. Maximal degree in co-relation 9892. Up to 2465 conditions per place. [2024-06-28 04:30:05,791 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-28 04:30:05,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 654 flow [2024-06-28 04:30:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-28 04:30:05,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:30:05,792 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 456 flow. Second operand 6 states and 95 transitions. [2024-06-28 04:30:05,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 654 flow [2024-06-28 04:30:05,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 625 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:05,801 INFO L231 Difference]: Finished difference. Result has 69 places, 68 transitions, 457 flow [2024-06-28 04:30:05,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=457, PETRI_PLACES=69, PETRI_TRANSITIONS=68} [2024-06-28 04:30:05,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-28 04:30:05,802 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 68 transitions, 457 flow [2024-06-28 04:30:05,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:05,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:05,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:05,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:30:05,803 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)] === [2024-06-28 04:30:05,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash 773388816, now seen corresponding path program 1 times [2024-06-28 04:30:05,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:05,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228649366] [2024-06-28 04:30:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:05,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228649366] [2024-06-28 04:30:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228649366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:06,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:06,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:06,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101794240] [2024-06-28 04:30:06,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:06,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:06,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:06,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:06,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 68 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:06,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:06,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:06,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:06,703 INFO L124 PetriNetUnfolderBase]: 1839/2735 cut-off events. [2024-06-28 04:30:06,703 INFO L125 PetriNetUnfolderBase]: For 14800/14800 co-relation queries the response was YES. [2024-06-28 04:30:06,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 2735 events. 1839/2735 cut-off events. For 14800/14800 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12390 event pairs, 549 based on Foata normal form. 12/2746 useless extension candidates. Maximal degree in co-relation 10988. Up to 2361 conditions per place. [2024-06-28 04:30:06,717 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 86 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-06-28 04:30:06,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 981 flow [2024-06-28 04:30:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 04:30:06,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-28 04:30:06,719 INFO L175 Difference]: Start difference. First operand has 69 places, 68 transitions, 457 flow. Second operand 7 states and 131 transitions. [2024-06-28 04:30:06,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 981 flow [2024-06-28 04:30:06,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 120 transitions, 934 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:06,729 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 658 flow [2024-06-28 04:30:06,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=658, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2024-06-28 04:30:06,730 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-28 04:30:06,730 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 658 flow [2024-06-28 04:30:06,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:06,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:06,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:06,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:30:06,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:06,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1129780498, now seen corresponding path program 2 times [2024-06-28 04:30:06,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:06,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565586314] [2024-06-28 04:30:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:06,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:07,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565586314] [2024-06-28 04:30:07,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565586314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:07,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:07,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70555275] [2024-06-28 04:30:07,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:07,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:07,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:07,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 658 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:07,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:07,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:07,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:07,646 INFO L124 PetriNetUnfolderBase]: 1875/2785 cut-off events. [2024-06-28 04:30:07,647 INFO L125 PetriNetUnfolderBase]: For 19841/19841 co-relation queries the response was YES. [2024-06-28 04:30:07,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12995 conditions, 2785 events. 1875/2785 cut-off events. For 19841/19841 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12564 event pairs, 591 based on Foata normal form. 6/2790 useless extension candidates. Maximal degree in co-relation 12961. Up to 2647 conditions per place. [2024-06-28 04:30:07,662 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 96 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-28 04:30:07,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 1138 flow [2024-06-28 04:30:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:30:07,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-28 04:30:07,664 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 658 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:30:07,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 1138 flow [2024-06-28 04:30:07,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 122 transitions, 1094 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-28 04:30:07,679 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 766 flow [2024-06-28 04:30:07,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=766, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-28 04:30:07,680 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-28 04:30:07,680 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 766 flow [2024-06-28 04:30:07,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:07,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:07,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:07,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:30:07,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:07,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1628244688, now seen corresponding path program 3 times [2024-06-28 04:30:07,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613080991] [2024-06-28 04:30:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:07,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613080991] [2024-06-28 04:30:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613080991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:08,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:08,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:08,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109836350] [2024-06-28 04:30:08,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:08,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:08,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:08,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 766 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:08,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:08,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:08,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:08,566 INFO L124 PetriNetUnfolderBase]: 1879/2791 cut-off events. [2024-06-28 04:30:08,567 INFO L125 PetriNetUnfolderBase]: For 23702/23702 co-relation queries the response was YES. [2024-06-28 04:30:08,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13571 conditions, 2791 events. 1879/2791 cut-off events. For 23702/23702 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12609 event pairs, 585 based on Foata normal form. 6/2796 useless extension candidates. Maximal degree in co-relation 13533. Up to 2716 conditions per place. [2024-06-28 04:30:08,582 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 99 selfloop transitions, 21 changer transitions 0/123 dead transitions. [2024-06-28 04:30:08,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 123 transitions, 1166 flow [2024-06-28 04:30:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:30:08,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-28 04:30:08,584 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 766 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:30:08,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 123 transitions, 1166 flow [2024-06-28 04:30:08,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 1117 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:08,603 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 844 flow [2024-06-28 04:30:08,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-28 04:30:08,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-28 04:30:08,605 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 844 flow [2024-06-28 04:30:08,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:08,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:08,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:08,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:30:08,606 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:08,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 950766414, now seen corresponding path program 1 times [2024-06-28 04:30:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381436251] [2024-06-28 04:30:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:08,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:09,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:09,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381436251] [2024-06-28 04:30:09,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381436251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:09,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:09,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:09,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942354007] [2024-06-28 04:30:09,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:09,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:09,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:09,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:09,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:09,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:09,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:10,286 INFO L124 PetriNetUnfolderBase]: 1882/2796 cut-off events. [2024-06-28 04:30:10,286 INFO L125 PetriNetUnfolderBase]: For 25921/25921 co-relation queries the response was YES. [2024-06-28 04:30:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13906 conditions, 2796 events. 1882/2796 cut-off events. For 25921/25921 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12644 event pairs, 567 based on Foata normal form. 6/2801 useless extension candidates. Maximal degree in co-relation 13866. Up to 2701 conditions per place. [2024-06-28 04:30:10,303 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 25 changer transitions 0/126 dead transitions. [2024-06-28 04:30:10,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1224 flow [2024-06-28 04:30:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:30:10,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 04:30:10,305 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 844 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:30:10,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1224 flow [2024-06-28 04:30:10,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 1171 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:10,325 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 887 flow [2024-06-28 04:30:10,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=887, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-06-28 04:30:10,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-28 04:30:10,326 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 887 flow [2024-06-28 04:30:10,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:10,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:10,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:10,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:30:10,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:10,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash 450339565, now seen corresponding path program 1 times [2024-06-28 04:30:10,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:10,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055157777] [2024-06-28 04:30:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:10,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:10,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055157777] [2024-06-28 04:30:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055157777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:30:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242233647] [2024-06-28 04:30:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:10,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:30:10,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:30:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:30:10,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:10,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 887 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:10,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:10,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:10,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:11,357 INFO L124 PetriNetUnfolderBase]: 1879/2792 cut-off events. [2024-06-28 04:30:11,357 INFO L125 PetriNetUnfolderBase]: For 28319/28319 co-relation queries the response was YES. [2024-06-28 04:30:11,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14297 conditions, 2792 events. 1879/2792 cut-off events. For 28319/28319 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12603 event pairs, 587 based on Foata normal form. 1/2792 useless extension candidates. Maximal degree in co-relation 14256. Up to 2777 conditions per place. [2024-06-28 04:30:11,372 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-28 04:30:11,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1125 flow [2024-06-28 04:30:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:30:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:30:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-06-28 04:30:11,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385 [2024-06-28 04:30:11,374 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 887 flow. Second operand 5 states and 77 transitions. [2024-06-28 04:30:11,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1125 flow [2024-06-28 04:30:11,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 1045 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:11,395 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 829 flow [2024-06-28 04:30:11,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=829, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-06-28 04:30:11,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-28 04:30:11,396 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 829 flow [2024-06-28 04:30:11,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:11,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:11,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:11,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:30:11,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:11,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2108162711, now seen corresponding path program 1 times [2024-06-28 04:30:11,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483041827] [2024-06-28 04:30:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:12,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:12,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483041827] [2024-06-28 04:30:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483041827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:12,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:12,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:12,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667901601] [2024-06-28 04:30:12,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:12,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:12,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:12,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:12,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 829 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:12,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:12,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:12,497 INFO L124 PetriNetUnfolderBase]: 1890/2809 cut-off events. [2024-06-28 04:30:12,497 INFO L125 PetriNetUnfolderBase]: For 31105/31111 co-relation queries the response was YES. [2024-06-28 04:30:12,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14432 conditions, 2809 events. 1890/2809 cut-off events. For 31105/31111 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12716 event pairs, 573 based on Foata normal form. 8/2816 useless extension candidates. Maximal degree in co-relation 14390. Up to 2672 conditions per place. [2024-06-28 04:30:12,510 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 108 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2024-06-28 04:30:12,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1299 flow [2024-06-28 04:30:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:30:12,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-28 04:30:12,512 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 829 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:30:12,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1299 flow [2024-06-28 04:30:12,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 1275 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:12,531 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 951 flow [2024-06-28 04:30:12,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=951, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-28 04:30:12,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-28 04:30:12,532 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 951 flow [2024-06-28 04:30:12,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:12,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:12,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:12,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:30:12,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:12,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:12,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2108252921, now seen corresponding path program 2 times [2024-06-28 04:30:12,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:12,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466754637] [2024-06-28 04:30:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:12,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:13,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:13,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466754637] [2024-06-28 04:30:13,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466754637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:13,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:13,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632879769] [2024-06-28 04:30:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:13,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:13,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:13,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 951 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:13,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:13,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:13,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:13,574 INFO L124 PetriNetUnfolderBase]: 1885/2802 cut-off events. [2024-06-28 04:30:13,574 INFO L125 PetriNetUnfolderBase]: For 35230/35236 co-relation queries the response was YES. [2024-06-28 04:30:13,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14990 conditions, 2802 events. 1885/2802 cut-off events. For 35230/35236 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12684 event pairs, 578 based on Foata normal form. 8/2809 useless extension candidates. Maximal degree in co-relation 14948. Up to 2700 conditions per place. [2024-06-28 04:30:13,590 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 107 selfloop transitions, 22 changer transitions 0/132 dead transitions. [2024-06-28 04:30:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 132 transitions, 1265 flow [2024-06-28 04:30:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 04:30:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 04:30:13,592 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 951 flow. Second operand 7 states and 116 transitions. [2024-06-28 04:30:13,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 132 transitions, 1265 flow [2024-06-28 04:30:13,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 132 transitions, 1184 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:13,621 INFO L231 Difference]: Finished difference. Result has 95 places, 110 transitions, 922 flow [2024-06-28 04:30:13,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=922, PETRI_PLACES=95, PETRI_TRANSITIONS=110} [2024-06-28 04:30:13,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-28 04:30:13,622 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 110 transitions, 922 flow [2024-06-28 04:30:13,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:13,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:13,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:13,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:30:13,624 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:13,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2111977726, now seen corresponding path program 1 times [2024-06-28 04:30:13,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:13,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675166218] [2024-06-28 04:30:13,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:13,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:14,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:14,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675166218] [2024-06-28 04:30:14,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675166218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:14,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:14,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:14,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411653029] [2024-06-28 04:30:14,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:14,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:14,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:14,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:14,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:14,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 110 transitions, 922 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:14,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:14,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:14,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:14,584 INFO L124 PetriNetUnfolderBase]: 1969/2923 cut-off events. [2024-06-28 04:30:14,584 INFO L125 PetriNetUnfolderBase]: For 40366/40368 co-relation queries the response was YES. [2024-06-28 04:30:14,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15892 conditions, 2923 events. 1969/2923 cut-off events. For 40366/40368 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13309 event pairs, 540 based on Foata normal form. 8/2930 useless extension candidates. Maximal degree in co-relation 15848. Up to 2461 conditions per place. [2024-06-28 04:30:14,600 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 101 selfloop transitions, 47 changer transitions 0/151 dead transitions. [2024-06-28 04:30:14,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1594 flow [2024-06-28 04:30:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:14,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:30:14,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 04:30:14,602 INFO L175 Difference]: Start difference. First operand has 95 places, 110 transitions, 922 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:30:14,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1594 flow [2024-06-28 04:30:14,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 151 transitions, 1539 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:14,629 INFO L231 Difference]: Finished difference. Result has 98 places, 119 transitions, 1129 flow [2024-06-28 04:30:14,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=98, PETRI_TRANSITIONS=119} [2024-06-28 04:30:14,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-28 04:30:14,630 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 119 transitions, 1129 flow [2024-06-28 04:30:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:14,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:14,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:14,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:30:14,631 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:14,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1794755250, now seen corresponding path program 2 times [2024-06-28 04:30:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:14,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583837626] [2024-06-28 04:30:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:14,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:15,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583837626] [2024-06-28 04:30:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583837626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:15,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:15,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099537778] [2024-06-28 04:30:15,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:15,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:15,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:15,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:15,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:15,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 119 transitions, 1129 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:15,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:15,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:15,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:15,562 INFO L124 PetriNetUnfolderBase]: 1957/2907 cut-off events. [2024-06-28 04:30:15,562 INFO L125 PetriNetUnfolderBase]: For 45917/45919 co-relation queries the response was YES. [2024-06-28 04:30:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16772 conditions, 2907 events. 1957/2907 cut-off events. For 45917/45919 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13243 event pairs, 540 based on Foata normal form. 8/2914 useless extension candidates. Maximal degree in co-relation 16725. Up to 2455 conditions per place. [2024-06-28 04:30:15,579 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 102 selfloop transitions, 50 changer transitions 0/155 dead transitions. [2024-06-28 04:30:15,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 1717 flow [2024-06-28 04:30:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 04:30:15,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-28 04:30:15,581 INFO L175 Difference]: Start difference. First operand has 98 places, 119 transitions, 1129 flow. Second operand 7 states and 133 transitions. [2024-06-28 04:30:15,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 1717 flow [2024-06-28 04:30:15,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 155 transitions, 1622 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:15,619 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1237 flow [2024-06-28 04:30:15,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1237, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-28 04:30:15,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-28 04:30:15,620 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1237 flow [2024-06-28 04:30:15,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:15,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:15,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:30:15,620 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)] === [2024-06-28 04:30:15,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash -663254450, now seen corresponding path program 3 times [2024-06-28 04:30:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:15,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015766691] [2024-06-28 04:30:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:16,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:16,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015766691] [2024-06-28 04:30:16,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015766691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:16,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:16,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:16,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860473567] [2024-06-28 04:30:16,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:16,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:16,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1237 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:16,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:16,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:16,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:16,530 INFO L124 PetriNetUnfolderBase]: 1961/2912 cut-off events. [2024-06-28 04:30:16,530 INFO L125 PetriNetUnfolderBase]: For 50184/50190 co-relation queries the response was YES. [2024-06-28 04:30:16,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17346 conditions, 2912 events. 1961/2912 cut-off events. For 50184/50190 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13195 event pairs, 576 based on Foata normal form. 12/2923 useless extension candidates. Maximal degree in co-relation 17296. Up to 2804 conditions per place. [2024-06-28 04:30:16,548 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 122 selfloop transitions, 23 changer transitions 0/148 dead transitions. [2024-06-28 04:30:16,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1685 flow [2024-06-28 04:30:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:30:16,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 04:30:16,550 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1237 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:30:16,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1685 flow [2024-06-28 04:30:16,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 148 transitions, 1585 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:16,587 INFO L231 Difference]: Finished difference. Result has 106 places, 126 transitions, 1264 flow [2024-06-28 04:30:16,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1264, PETRI_PLACES=106, PETRI_TRANSITIONS=126} [2024-06-28 04:30:16,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-28 04:30:16,590 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 126 transitions, 1264 flow [2024-06-28 04:30:16,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:16,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:16,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:30:16,591 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:16,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash -656096953, now seen corresponding path program 1 times [2024-06-28 04:30:16,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:16,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712466907] [2024-06-28 04:30:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:17,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:17,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712466907] [2024-06-28 04:30:17,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712466907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:17,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:17,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371081889] [2024-06-28 04:30:17,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:17,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:17,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:17,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:17,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 126 transitions, 1264 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:17,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:17,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:17,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:17,826 INFO L124 PetriNetUnfolderBase]: 1963/2914 cut-off events. [2024-06-28 04:30:17,827 INFO L125 PetriNetUnfolderBase]: For 52823/52823 co-relation queries the response was YES. [2024-06-28 04:30:17,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 2914 events. 1963/2914 cut-off events. For 52823/52823 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13286 event pairs, 563 based on Foata normal form. 3/2916 useless extension candidates. Maximal degree in co-relation 17211. Up to 2808 conditions per place. [2024-06-28 04:30:17,843 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 118 selfloop transitions, 30 changer transitions 0/151 dead transitions. [2024-06-28 04:30:17,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1708 flow [2024-06-28 04:30:17,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 04:30:17,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 04:30:17,844 INFO L175 Difference]: Start difference. First operand has 106 places, 126 transitions, 1264 flow. Second operand 7 states and 118 transitions. [2024-06-28 04:30:17,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1708 flow [2024-06-28 04:30:17,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 1639 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:17,879 INFO L231 Difference]: Finished difference. Result has 108 places, 130 transitions, 1333 flow [2024-06-28 04:30:17,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1333, PETRI_PLACES=108, PETRI_TRANSITIONS=130} [2024-06-28 04:30:17,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-28 04:30:17,879 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 130 transitions, 1333 flow [2024-06-28 04:30:17,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:17,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:17,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:17,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:30:17,880 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:17,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1075626349, now seen corresponding path program 1 times [2024-06-28 04:30:17,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:17,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26453729] [2024-06-28 04:30:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:18,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:18,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26453729] [2024-06-28 04:30:18,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26453729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:18,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:18,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:18,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089791572] [2024-06-28 04:30:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:18,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:18,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 130 transitions, 1333 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:18,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:18,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:18,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:18,830 INFO L124 PetriNetUnfolderBase]: 1957/2906 cut-off events. [2024-06-28 04:30:18,831 INFO L125 PetriNetUnfolderBase]: For 56297/56297 co-relation queries the response was YES. [2024-06-28 04:30:18,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17772 conditions, 2906 events. 1957/2906 cut-off events. For 56297/56297 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13119 event pairs, 573 based on Foata normal form. 2/2907 useless extension candidates. Maximal degree in co-relation 17721. Up to 2885 conditions per place. [2024-06-28 04:30:18,848 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 129 selfloop transitions, 11 changer transitions 0/143 dead transitions. [2024-06-28 04:30:18,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 1663 flow [2024-06-28 04:30:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:18,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-06-28 04:30:18,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37083333333333335 [2024-06-28 04:30:18,849 INFO L175 Difference]: Start difference. First operand has 108 places, 130 transitions, 1333 flow. Second operand 6 states and 89 transitions. [2024-06-28 04:30:18,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 1663 flow [2024-06-28 04:30:18,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 143 transitions, 1575 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:18,894 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1305 flow [2024-06-28 04:30:18,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1305, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-28 04:30:18,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-28 04:30:18,895 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1305 flow [2024-06-28 04:30:18,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:18,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:18,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:18,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:30:18,895 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:18,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:18,896 INFO L85 PathProgramCache]: Analyzing trace with hash 928475023, now seen corresponding path program 1 times [2024-06-28 04:30:18,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:18,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824687612] [2024-06-28 04:30:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:18,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:19,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824687612] [2024-06-28 04:30:19,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824687612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:19,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:19,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:19,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694675748] [2024-06-28 04:30:19,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:19,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:19,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:19,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:19,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:19,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:19,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1305 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:19,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:19,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:19,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:20,183 INFO L124 PetriNetUnfolderBase]: 2136/3195 cut-off events. [2024-06-28 04:30:20,183 INFO L125 PetriNetUnfolderBase]: For 63985/63991 co-relation queries the response was YES. [2024-06-28 04:30:20,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19589 conditions, 3195 events. 2136/3195 cut-off events. For 63985/63991 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14908 event pairs, 598 based on Foata normal form. 10/3204 useless extension candidates. Maximal degree in co-relation 19537. Up to 2965 conditions per place. [2024-06-28 04:30:20,205 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 155 selfloop transitions, 34 changer transitions 0/192 dead transitions. [2024-06-28 04:30:20,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 192 transitions, 2149 flow [2024-06-28 04:30:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:30:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:30:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 04:30:20,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-28 04:30:20,207 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1305 flow. Second operand 9 states and 141 transitions. [2024-06-28 04:30:20,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 192 transitions, 2149 flow [2024-06-28 04:30:20,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 192 transitions, 2109 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:20,259 INFO L231 Difference]: Finished difference. Result has 118 places, 158 transitions, 1670 flow [2024-06-28 04:30:20,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1670, PETRI_PLACES=118, PETRI_TRANSITIONS=158} [2024-06-28 04:30:20,260 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-28 04:30:20,260 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 158 transitions, 1670 flow [2024-06-28 04:30:20,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:20,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:20,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:20,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:30:20,260 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:20,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash 79070485, now seen corresponding path program 2 times [2024-06-28 04:30:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:20,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028301031] [2024-06-28 04:30:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:21,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:21,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028301031] [2024-06-28 04:30:21,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028301031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:21,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:21,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:21,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830543314] [2024-06-28 04:30:21,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:21,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:21,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 158 transitions, 1670 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:21,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:21,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:21,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:21,615 INFO L124 PetriNetUnfolderBase]: 2128/3183 cut-off events. [2024-06-28 04:30:21,615 INFO L125 PetriNetUnfolderBase]: For 68972/68978 co-relation queries the response was YES. [2024-06-28 04:30:21,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20182 conditions, 3183 events. 2128/3183 cut-off events. For 68972/68978 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14780 event pairs, 610 based on Foata normal form. 10/3192 useless extension candidates. Maximal degree in co-relation 20125. Up to 3022 conditions per place. [2024-06-28 04:30:21,637 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 156 selfloop transitions, 33 changer transitions 0/192 dead transitions. [2024-06-28 04:30:21,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 192 transitions, 2181 flow [2024-06-28 04:30:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-28 04:30:21,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-28 04:30:21,638 INFO L175 Difference]: Start difference. First operand has 118 places, 158 transitions, 1670 flow. Second operand 10 states and 152 transitions. [2024-06-28 04:30:21,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 192 transitions, 2181 flow [2024-06-28 04:30:21,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 192 transitions, 2095 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-28 04:30:21,706 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1734 flow [2024-06-28 04:30:21,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1734, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-06-28 04:30:21,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-28 04:30:21,707 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1734 flow [2024-06-28 04:30:21,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:21,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:21,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:21,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:30:21,707 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:21,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash 928535597, now seen corresponding path program 1 times [2024-06-28 04:30:21,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:21,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016839771] [2024-06-28 04:30:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:21,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:22,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016839771] [2024-06-28 04:30:22,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016839771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:22,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:22,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:22,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248331803] [2024-06-28 04:30:22,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:22,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:22,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:22,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1734 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:22,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:22,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:22,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:23,317 INFO L124 PetriNetUnfolderBase]: 2296/3410 cut-off events. [2024-06-28 04:30:23,318 INFO L125 PetriNetUnfolderBase]: For 79315/79320 co-relation queries the response was YES. [2024-06-28 04:30:23,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21740 conditions, 3410 events. 2296/3410 cut-off events. For 79315/79320 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15966 event pairs, 514 based on Foata normal form. 12/3421 useless extension candidates. Maximal degree in co-relation 21677. Up to 2140 conditions per place. [2024-06-28 04:30:23,340 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 167 selfloop transitions, 65 changer transitions 0/235 dead transitions. [2024-06-28 04:30:23,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 235 transitions, 2942 flow [2024-06-28 04:30:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 04:30:23,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509375 [2024-06-28 04:30:23,342 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1734 flow. Second operand 8 states and 163 transitions. [2024-06-28 04:30:23,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 235 transitions, 2942 flow [2024-06-28 04:30:23,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 235 transitions, 2884 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:23,409 INFO L231 Difference]: Finished difference. Result has 136 places, 184 transitions, 2126 flow [2024-06-28 04:30:23,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2126, PETRI_PLACES=136, PETRI_TRANSITIONS=184} [2024-06-28 04:30:23,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-28 04:30:23,410 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 184 transitions, 2126 flow [2024-06-28 04:30:23,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:23,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:23,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:30:23,411 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:23,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash 931336757, now seen corresponding path program 2 times [2024-06-28 04:30:23,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:23,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169844632] [2024-06-28 04:30:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:24,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:24,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169844632] [2024-06-28 04:30:24,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169844632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:24,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:24,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828586133] [2024-06-28 04:30:24,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:24,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:24,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:24,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 184 transitions, 2126 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:24,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:24,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:24,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:24,904 INFO L124 PetriNetUnfolderBase]: 2520/3721 cut-off events. [2024-06-28 04:30:24,904 INFO L125 PetriNetUnfolderBase]: For 97437/97445 co-relation queries the response was YES. [2024-06-28 04:30:24,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25827 conditions, 3721 events. 2520/3721 cut-off events. For 97437/97445 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17567 event pairs, 538 based on Foata normal form. 14/3734 useless extension candidates. Maximal degree in co-relation 25759. Up to 2650 conditions per place. [2024-06-28 04:30:24,932 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 171 selfloop transitions, 69 changer transitions 0/243 dead transitions. [2024-06-28 04:30:24,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 243 transitions, 3238 flow [2024-06-28 04:30:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 04:30:24,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-28 04:30:24,934 INFO L175 Difference]: Start difference. First operand has 136 places, 184 transitions, 2126 flow. Second operand 8 states and 159 transitions. [2024-06-28 04:30:24,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 243 transitions, 3238 flow [2024-06-28 04:30:25,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 243 transitions, 3140 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-06-28 04:30:25,036 INFO L231 Difference]: Finished difference. Result has 146 places, 199 transitions, 2470 flow [2024-06-28 04:30:25,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2040, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2470, PETRI_PLACES=146, PETRI_TRANSITIONS=199} [2024-06-28 04:30:25,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-28 04:30:25,037 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 199 transitions, 2470 flow [2024-06-28 04:30:25,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:25,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:25,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:25,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:30:25,039 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:25,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:25,040 INFO L85 PathProgramCache]: Analyzing trace with hash 81867119, now seen corresponding path program 3 times [2024-06-28 04:30:25,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:25,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56530303] [2024-06-28 04:30:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:25,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:25,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:25,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56530303] [2024-06-28 04:30:25,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56530303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:25,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:25,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:25,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140605766] [2024-06-28 04:30:25,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:25,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:25,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:25,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:25,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 199 transitions, 2470 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:25,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:25,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:25,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:26,382 INFO L124 PetriNetUnfolderBase]: 2656/3912 cut-off events. [2024-06-28 04:30:26,382 INFO L125 PetriNetUnfolderBase]: For 113411/113419 co-relation queries the response was YES. [2024-06-28 04:30:26,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28692 conditions, 3912 events. 2656/3912 cut-off events. For 113411/113419 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18601 event pairs, 563 based on Foata normal form. 14/3925 useless extension candidates. Maximal degree in co-relation 28618. Up to 2695 conditions per place. [2024-06-28 04:30:26,415 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 173 selfloop transitions, 77 changer transitions 0/253 dead transitions. [2024-06-28 04:30:26,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 253 transitions, 3562 flow [2024-06-28 04:30:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:26,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 04:30:26,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-28 04:30:26,417 INFO L175 Difference]: Start difference. First operand has 146 places, 199 transitions, 2470 flow. Second operand 8 states and 159 transitions. [2024-06-28 04:30:26,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 253 transitions, 3562 flow [2024-06-28 04:30:26,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 253 transitions, 3442 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:26,558 INFO L231 Difference]: Finished difference. Result has 152 places, 209 transitions, 2688 flow [2024-06-28 04:30:26,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2688, PETRI_PLACES=152, PETRI_TRANSITIONS=209} [2024-06-28 04:30:26,559 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-28 04:30:26,559 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 209 transitions, 2688 flow [2024-06-28 04:30:26,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:26,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:26,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:26,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:30:26,560 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)] === [2024-06-28 04:30:26,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash 197158289, now seen corresponding path program 4 times [2024-06-28 04:30:26,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:26,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777206676] [2024-06-28 04:30:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:26,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777206676] [2024-06-28 04:30:27,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777206676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:27,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:27,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817198887] [2024-06-28 04:30:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:27,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:27,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:27,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:27,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 209 transitions, 2688 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:27,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:27,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:27,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:27,927 INFO L124 PetriNetUnfolderBase]: 2720/4003 cut-off events. [2024-06-28 04:30:27,927 INFO L125 PetriNetUnfolderBase]: For 124925/124935 co-relation queries the response was YES. [2024-06-28 04:30:27,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29995 conditions, 4003 events. 2720/4003 cut-off events. For 124925/124935 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19148 event pairs, 539 based on Foata normal form. 18/4020 useless extension candidates. Maximal degree in co-relation 29919. Up to 2722 conditions per place. [2024-06-28 04:30:28,074 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 186 selfloop transitions, 83 changer transitions 0/272 dead transitions. [2024-06-28 04:30:28,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 272 transitions, 3996 flow [2024-06-28 04:30:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 04:30:28,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-28 04:30:28,075 INFO L175 Difference]: Start difference. First operand has 152 places, 209 transitions, 2688 flow. Second operand 8 states and 167 transitions. [2024-06-28 04:30:28,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 272 transitions, 3996 flow [2024-06-28 04:30:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 272 transitions, 3841 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:28,219 INFO L231 Difference]: Finished difference. Result has 159 places, 219 transitions, 2992 flow [2024-06-28 04:30:28,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2992, PETRI_PLACES=159, PETRI_TRANSITIONS=219} [2024-06-28 04:30:28,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-28 04:30:28,220 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 219 transitions, 2992 flow [2024-06-28 04:30:28,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:28,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:28,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:28,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:30:28,221 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)] === [2024-06-28 04:30:28,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1046807851, now seen corresponding path program 1 times [2024-06-28 04:30:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718811239] [2024-06-28 04:30:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718811239] [2024-06-28 04:30:29,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718811239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:29,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:29,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:29,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276063934] [2024-06-28 04:30:29,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:29,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:29,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:29,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 219 transitions, 2992 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:29,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:29,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:29,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:29,873 INFO L124 PetriNetUnfolderBase]: 2776/4092 cut-off events. [2024-06-28 04:30:29,873 INFO L125 PetriNetUnfolderBase]: For 139155/139163 co-relation queries the response was YES. [2024-06-28 04:30:29,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32250 conditions, 4092 events. 2776/4092 cut-off events. For 139155/139163 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19782 event pairs, 541 based on Foata normal form. 18/4109 useless extension candidates. Maximal degree in co-relation 32169. Up to 3518 conditions per place. [2024-06-28 04:30:29,911 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 192 selfloop transitions, 60 changer transitions 0/255 dead transitions. [2024-06-28 04:30:29,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 3826 flow [2024-06-28 04:30:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:30:29,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-28 04:30:29,913 INFO L175 Difference]: Start difference. First operand has 159 places, 219 transitions, 2992 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:30:29,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 3826 flow [2024-06-28 04:30:30,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 255 transitions, 3586 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:30,093 INFO L231 Difference]: Finished difference. Result has 162 places, 223 transitions, 2971 flow [2024-06-28 04:30:30,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2971, PETRI_PLACES=162, PETRI_TRANSITIONS=223} [2024-06-28 04:30:30,093 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-28 04:30:30,094 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 223 transitions, 2971 flow [2024-06-28 04:30:30,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:30,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:30,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:30,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:30:30,094 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:30,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1046800907, now seen corresponding path program 5 times [2024-06-28 04:30:30,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:30,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351019147] [2024-06-28 04:30:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:30,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351019147] [2024-06-28 04:30:30,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351019147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:30,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:30,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064779151] [2024-06-28 04:30:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:30,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:30,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:30,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 223 transitions, 2971 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:30,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:30,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:30,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:31,667 INFO L124 PetriNetUnfolderBase]: 2936/4317 cut-off events. [2024-06-28 04:30:31,667 INFO L125 PetriNetUnfolderBase]: For 152266/152271 co-relation queries the response was YES. [2024-06-28 04:30:31,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33237 conditions, 4317 events. 2936/4317 cut-off events. For 152266/152271 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20928 event pairs, 516 based on Foata normal form. 12/4328 useless extension candidates. Maximal degree in co-relation 33156. Up to 3173 conditions per place. [2024-06-28 04:30:31,711 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 198 selfloop transitions, 79 changer transitions 0/280 dead transitions. [2024-06-28 04:30:31,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 280 transitions, 4215 flow [2024-06-28 04:30:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 04:30:31,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-28 04:30:31,729 INFO L175 Difference]: Start difference. First operand has 162 places, 223 transitions, 2971 flow. Second operand 8 states and 157 transitions. [2024-06-28 04:30:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 280 transitions, 4215 flow [2024-06-28 04:30:31,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 280 transitions, 4030 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:31,902 INFO L231 Difference]: Finished difference. Result has 166 places, 238 transitions, 3282 flow [2024-06-28 04:30:31,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3282, PETRI_PLACES=166, PETRI_TRANSITIONS=238} [2024-06-28 04:30:31,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-28 04:30:31,903 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 238 transitions, 3282 flow [2024-06-28 04:30:31,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:31,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:31,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:31,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:30:31,904 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:31,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1046627927, now seen corresponding path program 6 times [2024-06-28 04:30:31,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:31,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886641740] [2024-06-28 04:30:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:31,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:32,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886641740] [2024-06-28 04:30:32,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886641740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:32,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:32,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:32,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105434795] [2024-06-28 04:30:32,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:32,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:32,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 238 transitions, 3282 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:32,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:32,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:32,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:33,306 INFO L124 PetriNetUnfolderBase]: 3000/4407 cut-off events. [2024-06-28 04:30:33,307 INFO L125 PetriNetUnfolderBase]: For 165422/165432 co-relation queries the response was YES. [2024-06-28 04:30:33,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34876 conditions, 4407 events. 3000/4407 cut-off events. For 165422/165432 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21406 event pairs, 549 based on Foata normal form. 18/4424 useless extension candidates. Maximal degree in co-relation 34792. Up to 3265 conditions per place. [2024-06-28 04:30:33,351 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 202 selfloop transitions, 85 changer transitions 0/290 dead transitions. [2024-06-28 04:30:33,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 290 transitions, 4470 flow [2024-06-28 04:30:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 04:30:33,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2024-06-28 04:30:33,352 INFO L175 Difference]: Start difference. First operand has 166 places, 238 transitions, 3282 flow. Second operand 8 states and 161 transitions. [2024-06-28 04:30:33,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 290 transitions, 4470 flow [2024-06-28 04:30:33,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 290 transitions, 4312 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:33,575 INFO L231 Difference]: Finished difference. Result has 172 places, 244 transitions, 3485 flow [2024-06-28 04:30:33,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3485, PETRI_PLACES=172, PETRI_TRANSITIONS=244} [2024-06-28 04:30:33,575 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-28 04:30:33,576 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 244 transitions, 3485 flow [2024-06-28 04:30:33,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:33,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:33,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:33,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:30:33,576 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:33,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:33,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1060406134, now seen corresponding path program 1 times [2024-06-28 04:30:33,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:33,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139347840] [2024-06-28 04:30:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:33,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:34,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:34,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139347840] [2024-06-28 04:30:34,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139347840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:34,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:34,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224037670] [2024-06-28 04:30:34,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:34,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:34,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:34,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:34,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 244 transitions, 3485 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:34,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:34,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:34,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:34,714 INFO L124 PetriNetUnfolderBase]: 3005/4410 cut-off events. [2024-06-28 04:30:34,715 INFO L125 PetriNetUnfolderBase]: For 172849/172857 co-relation queries the response was YES. [2024-06-28 04:30:34,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35515 conditions, 4410 events. 3005/4410 cut-off events. For 172849/172857 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21345 event pairs, 729 based on Foata normal form. 9/4418 useless extension candidates. Maximal degree in co-relation 35429. Up to 4364 conditions per place. [2024-06-28 04:30:34,755 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 240 selfloop transitions, 19 changer transitions 0/262 dead transitions. [2024-06-28 04:30:34,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 262 transitions, 4159 flow [2024-06-28 04:30:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 04:30:34,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-28 04:30:34,756 INFO L175 Difference]: Start difference. First operand has 172 places, 244 transitions, 3485 flow. Second operand 6 states and 97 transitions. [2024-06-28 04:30:34,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 262 transitions, 4159 flow [2024-06-28 04:30:34,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 262 transitions, 3928 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:34,959 INFO L231 Difference]: Finished difference. Result has 173 places, 247 transitions, 3355 flow [2024-06-28 04:30:34,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3355, PETRI_PLACES=173, PETRI_TRANSITIONS=247} [2024-06-28 04:30:34,960 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-28 04:30:34,960 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 247 transitions, 3355 flow [2024-06-28 04:30:34,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:34,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:34,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:34,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:30:34,961 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)] === [2024-06-28 04:30:34,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1602917679, now seen corresponding path program 2 times [2024-06-28 04:30:34,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96144945] [2024-06-28 04:30:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:35,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:35,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96144945] [2024-06-28 04:30:35,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96144945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:35,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:35,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020940626] [2024-06-28 04:30:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:35,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:35,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:35,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:35,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 247 transitions, 3355 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:35,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:35,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:35,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:36,617 INFO L124 PetriNetUnfolderBase]: 3033/4463 cut-off events. [2024-06-28 04:30:36,617 INFO L125 PetriNetUnfolderBase]: For 180124/180124 co-relation queries the response was YES. [2024-06-28 04:30:36,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35165 conditions, 4463 events. 3033/4463 cut-off events. For 180124/180124 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21756 event pairs, 780 based on Foata normal form. 6/4468 useless extension candidates. Maximal degree in co-relation 35078. Up to 4293 conditions per place. [2024-06-28 04:30:36,661 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 243 selfloop transitions, 31 changer transitions 0/277 dead transitions. [2024-06-28 04:30:36,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 277 transitions, 4177 flow [2024-06-28 04:30:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:30:36,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-28 04:30:36,663 INFO L175 Difference]: Start difference. First operand has 173 places, 247 transitions, 3355 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:30:36,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 277 transitions, 4177 flow [2024-06-28 04:30:36,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 277 transitions, 4019 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:36,887 INFO L231 Difference]: Finished difference. Result has 175 places, 250 transitions, 3353 flow [2024-06-28 04:30:36,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3353, PETRI_PLACES=175, PETRI_TRANSITIONS=250} [2024-06-28 04:30:36,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-28 04:30:36,888 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 250 transitions, 3353 flow [2024-06-28 04:30:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:36,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:36,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:36,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:30:36,889 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:36,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1375016529, now seen corresponding path program 3 times [2024-06-28 04:30:36,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:36,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324463121] [2024-06-28 04:30:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:36,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324463121] [2024-06-28 04:30:37,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324463121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:37,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:37,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:37,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794727633] [2024-06-28 04:30:37,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:37,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:37,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:37,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:37,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 250 transitions, 3353 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:37,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:37,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:37,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:38,421 INFO L124 PetriNetUnfolderBase]: 3061/4507 cut-off events. [2024-06-28 04:30:38,421 INFO L125 PetriNetUnfolderBase]: For 189302/189302 co-relation queries the response was YES. [2024-06-28 04:30:38,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35882 conditions, 4507 events. 3061/4507 cut-off events. For 189302/189302 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22020 event pairs, 775 based on Foata normal form. 6/4512 useless extension candidates. Maximal degree in co-relation 35795. Up to 4397 conditions per place. [2024-06-28 04:30:38,467 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 250 selfloop transitions, 25 changer transitions 0/278 dead transitions. [2024-06-28 04:30:38,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 278 transitions, 4117 flow [2024-06-28 04:30:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:30:38,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-28 04:30:38,468 INFO L175 Difference]: Start difference. First operand has 175 places, 250 transitions, 3353 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:30:38,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 278 transitions, 4117 flow [2024-06-28 04:30:38,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 278 transitions, 3975 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:38,692 INFO L231 Difference]: Finished difference. Result has 177 places, 253 transitions, 3361 flow [2024-06-28 04:30:38,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3361, PETRI_PLACES=177, PETRI_TRANSITIONS=253} [2024-06-28 04:30:38,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-28 04:30:38,692 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 253 transitions, 3361 flow [2024-06-28 04:30:38,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:38,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:38,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:30:38,693 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1141782897, now seen corresponding path program 4 times [2024-06-28 04:30:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340703760] [2024-06-28 04:30:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:39,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340703760] [2024-06-28 04:30:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340703760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:39,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:39,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:39,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633687788] [2024-06-28 04:30:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:39,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:39,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:39,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:39,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 253 transitions, 3361 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:39,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:39,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:39,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:40,264 INFO L124 PetriNetUnfolderBase]: 3089/4551 cut-off events. [2024-06-28 04:30:40,264 INFO L125 PetriNetUnfolderBase]: For 197304/197304 co-relation queries the response was YES. [2024-06-28 04:30:40,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36256 conditions, 4551 events. 3089/4551 cut-off events. For 197304/197304 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22307 event pairs, 787 based on Foata normal form. 6/4556 useless extension candidates. Maximal degree in co-relation 36168. Up to 4382 conditions per place. [2024-06-28 04:30:40,310 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 240 selfloop transitions, 38 changer transitions 0/281 dead transitions. [2024-06-28 04:30:40,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 281 transitions, 4137 flow [2024-06-28 04:30:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:30:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:30:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 04:30:40,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-28 04:30:40,311 INFO L175 Difference]: Start difference. First operand has 177 places, 253 transitions, 3361 flow. Second operand 9 states and 141 transitions. [2024-06-28 04:30:40,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 281 transitions, 4137 flow [2024-06-28 04:30:40,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 281 transitions, 4013 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:40,547 INFO L231 Difference]: Finished difference. Result has 180 places, 256 transitions, 3421 flow [2024-06-28 04:30:40,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3421, PETRI_PLACES=180, PETRI_TRANSITIONS=256} [2024-06-28 04:30:40,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-28 04:30:40,548 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 256 transitions, 3421 flow [2024-06-28 04:30:40,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:40,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:40,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:40,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:30:40,548 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:40,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1366742567, now seen corresponding path program 1 times [2024-06-28 04:30:40,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:40,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390774075] [2024-06-28 04:30:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390774075] [2024-06-28 04:30:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390774075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:41,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:41,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:41,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339570113] [2024-06-28 04:30:41,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:41,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:41,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:41,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 256 transitions, 3421 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:41,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:41,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:41,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:42,118 INFO L124 PetriNetUnfolderBase]: 3091/4555 cut-off events. [2024-06-28 04:30:42,118 INFO L125 PetriNetUnfolderBase]: For 203768/203774 co-relation queries the response was YES. [2024-06-28 04:30:42,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36524 conditions, 4555 events. 3091/4555 cut-off events. For 203768/203774 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22386 event pairs, 793 based on Foata normal form. 9/4563 useless extension candidates. Maximal degree in co-relation 36435. Up to 4390 conditions per place. [2024-06-28 04:30:42,162 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 241 selfloop transitions, 37 changer transitions 0/281 dead transitions. [2024-06-28 04:30:42,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 281 transitions, 4199 flow [2024-06-28 04:30:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:30:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:30:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 04:30:42,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:30:42,164 INFO L175 Difference]: Start difference. First operand has 180 places, 256 transitions, 3421 flow. Second operand 7 states and 120 transitions. [2024-06-28 04:30:42,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 281 transitions, 4199 flow [2024-06-28 04:30:42,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 281 transitions, 4045 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:42,406 INFO L231 Difference]: Finished difference. Result has 181 places, 260 transitions, 3463 flow [2024-06-28 04:30:42,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3463, PETRI_PLACES=181, PETRI_TRANSITIONS=260} [2024-06-28 04:30:42,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-28 04:30:42,407 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 260 transitions, 3463 flow [2024-06-28 04:30:42,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:42,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:42,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:42,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:30:42,408 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:42,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1135594411, now seen corresponding path program 7 times [2024-06-28 04:30:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:42,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243584354] [2024-06-28 04:30:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243584354] [2024-06-28 04:30:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243584354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:43,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:43,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231883644] [2024-06-28 04:30:43,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:43,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:43,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 260 transitions, 3463 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:43,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:43,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:43,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:43,933 INFO L124 PetriNetUnfolderBase]: 3219/4733 cut-off events. [2024-06-28 04:30:43,933 INFO L125 PetriNetUnfolderBase]: For 212035/212041 co-relation queries the response was YES. [2024-06-28 04:30:43,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37642 conditions, 4733 events. 3219/4733 cut-off events. For 212035/212041 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23313 event pairs, 799 based on Foata normal form. 16/4748 useless extension candidates. Maximal degree in co-relation 37552. Up to 4338 conditions per place. [2024-06-28 04:30:43,981 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 260 selfloop transitions, 48 changer transitions 0/311 dead transitions. [2024-06-28 04:30:43,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 311 transitions, 4722 flow [2024-06-28 04:30:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:30:43,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-28 04:30:43,982 INFO L175 Difference]: Start difference. First operand has 181 places, 260 transitions, 3463 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:30:43,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 311 transitions, 4722 flow [2024-06-28 04:30:44,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 311 transitions, 4600 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 04:30:44,251 INFO L231 Difference]: Finished difference. Result has 187 places, 275 transitions, 3792 flow [2024-06-28 04:30:44,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3792, PETRI_PLACES=187, PETRI_TRANSITIONS=275} [2024-06-28 04:30:44,252 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-28 04:30:44,252 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 275 transitions, 3792 flow [2024-06-28 04:30:44,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:44,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:44,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:44,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:30:44,252 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:44,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1144172235, now seen corresponding path program 5 times [2024-06-28 04:30:44,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:44,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440724305] [2024-06-28 04:30:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:44,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:44,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:44,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440724305] [2024-06-28 04:30:44,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440724305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:44,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:44,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:30:44,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961625624] [2024-06-28 04:30:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:44,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:30:44,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:30:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:30:44,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:44,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 275 transitions, 3792 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:44,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:44,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:44,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:45,968 INFO L124 PetriNetUnfolderBase]: 3222/4737 cut-off events. [2024-06-28 04:30:45,969 INFO L125 PetriNetUnfolderBase]: For 220758/220758 co-relation queries the response was YES. [2024-06-28 04:30:45,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38472 conditions, 4737 events. 3222/4737 cut-off events. For 220758/220758 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23356 event pairs, 812 based on Foata normal form. 6/4742 useless extension candidates. Maximal degree in co-relation 38378. Up to 4599 conditions per place. [2024-06-28 04:30:46,017 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 271 selfloop transitions, 29 changer transitions 0/303 dead transitions. [2024-06-28 04:30:46,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 303 transitions, 4618 flow [2024-06-28 04:30:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:30:46,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 04:30:46,018 INFO L175 Difference]: Start difference. First operand has 187 places, 275 transitions, 3792 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:30:46,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 303 transitions, 4618 flow [2024-06-28 04:30:46,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 303 transitions, 4458 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:46,322 INFO L231 Difference]: Finished difference. Result has 192 places, 278 transitions, 3798 flow [2024-06-28 04:30:46,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3798, PETRI_PLACES=192, PETRI_TRANSITIONS=278} [2024-06-28 04:30:46,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-28 04:30:46,323 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 278 transitions, 3798 flow [2024-06-28 04:30:46,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:46,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:46,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:46,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:30:46,324 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:46,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1015333684, now seen corresponding path program 2 times [2024-06-28 04:30:46,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:46,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819691133] [2024-06-28 04:30:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819691133] [2024-06-28 04:30:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819691133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:46,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:46,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:46,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120577118] [2024-06-28 04:30:46,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:46,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:46,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:46,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:46,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:46,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 278 transitions, 3798 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:46,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:46,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:46,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:47,593 INFO L124 PetriNetUnfolderBase]: 3219/4733 cut-off events. [2024-06-28 04:30:47,593 INFO L125 PetriNetUnfolderBase]: For 224374/224374 co-relation queries the response was YES. [2024-06-28 04:30:47,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38303 conditions, 4733 events. 3219/4733 cut-off events. For 224374/224374 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23357 event pairs, 839 based on Foata normal form. 1/4733 useless extension candidates. Maximal degree in co-relation 38208. Up to 4704 conditions per place. [2024-06-28 04:30:47,647 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 271 selfloop transitions, 12 changer transitions 0/286 dead transitions. [2024-06-28 04:30:47,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 286 transitions, 4384 flow [2024-06-28 04:30:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-06-28 04:30:47,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-28 04:30:47,648 INFO L175 Difference]: Start difference. First operand has 192 places, 278 transitions, 3798 flow. Second operand 6 states and 88 transitions. [2024-06-28 04:30:47,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 286 transitions, 4384 flow [2024-06-28 04:30:48,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 286 transitions, 4230 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 04:30:48,004 INFO L231 Difference]: Finished difference. Result has 192 places, 278 transitions, 3674 flow [2024-06-28 04:30:48,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3674, PETRI_PLACES=192, PETRI_TRANSITIONS=278} [2024-06-28 04:30:48,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-28 04:30:48,005 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 278 transitions, 3674 flow [2024-06-28 04:30:48,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:48,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:48,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:48,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:30:48,006 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:48,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1758667557, now seen corresponding path program 3 times [2024-06-28 04:30:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:48,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280180696] [2024-06-28 04:30:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:48,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:48,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280180696] [2024-06-28 04:30:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280180696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:48,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:48,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:48,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800767097] [2024-06-28 04:30:48,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:48,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:48,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:48,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:48,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 278 transitions, 3674 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:48,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:48,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:48,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:49,578 INFO L124 PetriNetUnfolderBase]: 3416/5042 cut-off events. [2024-06-28 04:30:49,578 INFO L125 PetriNetUnfolderBase]: For 242190/242199 co-relation queries the response was YES. [2024-06-28 04:30:49,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40504 conditions, 5042 events. 3416/5042 cut-off events. For 242190/242199 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25339 event pairs, 820 based on Foata normal form. 12/5053 useless extension candidates. Maximal degree in co-relation 40408. Up to 4662 conditions per place. [2024-06-28 04:30:49,634 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 287 selfloop transitions, 68 changer transitions 0/358 dead transitions. [2024-06-28 04:30:49,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 358 transitions, 5325 flow [2024-06-28 04:30:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:30:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:30:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 04:30:49,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-28 04:30:49,636 INFO L175 Difference]: Start difference. First operand has 192 places, 278 transitions, 3674 flow. Second operand 9 states and 152 transitions. [2024-06-28 04:30:49,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 358 transitions, 5325 flow [2024-06-28 04:30:50,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 358 transitions, 5289 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:50,016 INFO L231 Difference]: Finished difference. Result has 200 places, 317 transitions, 4478 flow [2024-06-28 04:30:50,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4478, PETRI_PLACES=200, PETRI_TRANSITIONS=317} [2024-06-28 04:30:50,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-28 04:30:50,016 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 317 transitions, 4478 flow [2024-06-28 04:30:50,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:50,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:50,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:50,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:30:50,017 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:50,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1303291395, now seen corresponding path program 4 times [2024-06-28 04:30:50,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:50,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837494504] [2024-06-28 04:30:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:50,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:50,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:50,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837494504] [2024-06-28 04:30:50,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837494504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:50,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:50,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:30:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378743607] [2024-06-28 04:30:50,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:50,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:30:50,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:30:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:30:50,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:50,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 317 transitions, 4478 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:50,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:50,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:50,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:51,642 INFO L124 PetriNetUnfolderBase]: 3440/5076 cut-off events. [2024-06-28 04:30:51,642 INFO L125 PetriNetUnfolderBase]: For 253180/253196 co-relation queries the response was YES. [2024-06-28 04:30:51,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41811 conditions, 5076 events. 3440/5076 cut-off events. For 253180/253196 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25483 event pairs, 818 based on Foata normal form. 18/5093 useless extension candidates. Maximal degree in co-relation 41711. Up to 4787 conditions per place. [2024-06-28 04:30:51,696 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 292 selfloop transitions, 72 changer transitions 0/367 dead transitions. [2024-06-28 04:30:51,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 367 transitions, 5596 flow [2024-06-28 04:30:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:30:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:30:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 04:30:51,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-28 04:30:51,697 INFO L175 Difference]: Start difference. First operand has 200 places, 317 transitions, 4478 flow. Second operand 10 states and 163 transitions. [2024-06-28 04:30:51,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 367 transitions, 5596 flow [2024-06-28 04:30:52,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 367 transitions, 5441 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-28 04:30:52,051 INFO L231 Difference]: Finished difference. Result has 211 places, 330 transitions, 4773 flow [2024-06-28 04:30:52,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4773, PETRI_PLACES=211, PETRI_TRANSITIONS=330} [2024-06-28 04:30:52,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-28 04:30:52,052 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 330 transitions, 4773 flow [2024-06-28 04:30:52,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:52,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:52,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:52,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:30:52,053 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:52,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1170282015, now seen corresponding path program 5 times [2024-06-28 04:30:52,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:52,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905587342] [2024-06-28 04:30:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:52,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905587342] [2024-06-28 04:30:52,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905587342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:52,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:52,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517389023] [2024-06-28 04:30:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:52,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:52,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:52,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:52,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 04:30:52,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 330 transitions, 4773 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:52,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:52,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 04:30:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:53,440 INFO L124 PetriNetUnfolderBase]: 3436/5170 cut-off events. [2024-06-28 04:30:53,440 INFO L125 PetriNetUnfolderBase]: For 264593/264661 co-relation queries the response was YES. [2024-06-28 04:30:53,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42703 conditions, 5170 events. 3436/5170 cut-off events. For 264593/264661 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27196 event pairs, 671 based on Foata normal form. 22/5153 useless extension candidates. Maximal degree in co-relation 42598. Up to 4186 conditions per place. [2024-06-28 04:30:53,500 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 113 changer transitions 0/388 dead transitions. [2024-06-28 04:30:53,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 388 transitions, 6219 flow [2024-06-28 04:30:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:30:53,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-28 04:30:53,501 INFO L175 Difference]: Start difference. First operand has 211 places, 330 transitions, 4773 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:30:53,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 388 transitions, 6219 flow [2024-06-28 04:30:53,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 388 transitions, 6068 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 04:30:53,903 INFO L231 Difference]: Finished difference. Result has 214 places, 358 transitions, 5370 flow [2024-06-28 04:30:53,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4628, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5370, PETRI_PLACES=214, PETRI_TRANSITIONS=358} [2024-06-28 04:30:53,903 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-28 04:30:53,904 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 358 transitions, 5370 flow [2024-06-28 04:30:53,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:53,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:53,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:53,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:30:53,904 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:53,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1574926895, now seen corresponding path program 6 times [2024-06-28 04:30:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36095602] [2024-06-28 04:30:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:54,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36095602] [2024-06-28 04:30:54,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36095602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:54,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:54,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:54,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467470556] [2024-06-28 04:30:54,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:54,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:54,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:54,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:54,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 04:30:54,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 358 transitions, 5370 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:54,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:54,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 04:30:54,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:55,464 INFO L124 PetriNetUnfolderBase]: 3558/5367 cut-off events. [2024-06-28 04:30:55,465 INFO L125 PetriNetUnfolderBase]: For 287883/287951 co-relation queries the response was YES. [2024-06-28 04:30:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45427 conditions, 5367 events. 3558/5367 cut-off events. For 287883/287951 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 28606 event pairs, 800 based on Foata normal form. 24/5352 useless extension candidates. Maximal degree in co-relation 45319. Up to 4449 conditions per place. [2024-06-28 04:30:55,529 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 124 changer transitions 0/417 dead transitions. [2024-06-28 04:30:55,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 417 transitions, 6995 flow [2024-06-28 04:30:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:30:55,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-28 04:30:55,531 INFO L175 Difference]: Start difference. First operand has 214 places, 358 transitions, 5370 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:30:55,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 417 transitions, 6995 flow [2024-06-28 04:30:56,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 417 transitions, 6667 flow, removed 125 selfloop flow, removed 3 redundant places. [2024-06-28 04:30:56,029 INFO L231 Difference]: Finished difference. Result has 221 places, 384 transitions, 5959 flow [2024-06-28 04:30:56,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5959, PETRI_PLACES=221, PETRI_TRANSITIONS=384} [2024-06-28 04:30:56,030 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-28 04:30:56,030 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 384 transitions, 5959 flow [2024-06-28 04:30:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:56,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:56,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:56,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:30:56,030 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:56,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1590699695, now seen corresponding path program 7 times [2024-06-28 04:30:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:56,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579085024] [2024-06-28 04:30:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:56,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:56,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:56,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579085024] [2024-06-28 04:30:56,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579085024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:56,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:56,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:30:56,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405599340] [2024-06-28 04:30:56,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:56,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:30:56,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:56,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:30:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:30:56,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 04:30:56,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 384 transitions, 5959 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:56,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:56,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 04:30:56,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:57,622 INFO L124 PetriNetUnfolderBase]: 3563/5373 cut-off events. [2024-06-28 04:30:57,622 INFO L125 PetriNetUnfolderBase]: For 285634/285710 co-relation queries the response was YES. [2024-06-28 04:30:57,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45727 conditions, 5373 events. 3563/5373 cut-off events. For 285634/285710 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28596 event pairs, 805 based on Foata normal form. 30/5364 useless extension candidates. Maximal degree in co-relation 45615. Up to 4712 conditions per place. [2024-06-28 04:30:57,688 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 276 selfloop transitions, 103 changer transitions 0/418 dead transitions. [2024-06-28 04:30:57,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 418 transitions, 6958 flow [2024-06-28 04:30:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:30:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:30:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:30:57,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-28 04:30:57,690 INFO L175 Difference]: Start difference. First operand has 221 places, 384 transitions, 5959 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:30:57,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 418 transitions, 6958 flow [2024-06-28 04:30:58,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 418 transitions, 6610 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-06-28 04:30:58,422 INFO L231 Difference]: Finished difference. Result has 226 places, 390 transitions, 5992 flow [2024-06-28 04:30:58,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5992, PETRI_PLACES=226, PETRI_TRANSITIONS=390} [2024-06-28 04:30:58,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-28 04:30:58,422 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 390 transitions, 5992 flow [2024-06-28 04:30:58,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:58,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:30:58,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:30:58,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:30:58,423 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:30:58,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:30:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash 583130218, now seen corresponding path program 1 times [2024-06-28 04:30:58,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:30:58,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999409684] [2024-06-28 04:30:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:30:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:30:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:30:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:30:58,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:30:58,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999409684] [2024-06-28 04:30:58,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999409684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:30:58,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:30:58,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:30:58,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337765802] [2024-06-28 04:30:58,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:30:58,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:30:58,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:30:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:30:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:30:58,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:30:58,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 390 transitions, 5992 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:30:58,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:30:58,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:30:58,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:30:59,815 INFO L124 PetriNetUnfolderBase]: 3727/5551 cut-off events. [2024-06-28 04:30:59,815 INFO L125 PetriNetUnfolderBase]: For 291352/291352 co-relation queries the response was YES. [2024-06-28 04:30:59,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46673 conditions, 5551 events. 3727/5551 cut-off events. For 291352/291352 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28924 event pairs, 1000 based on Foata normal form. 3/5553 useless extension candidates. Maximal degree in co-relation 46560. Up to 5432 conditions per place. [2024-06-28 04:30:59,879 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 377 selfloop transitions, 25 changer transitions 0/405 dead transitions. [2024-06-28 04:30:59,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 405 transitions, 6972 flow [2024-06-28 04:30:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:30:59,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:30:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-28 04:30:59,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-28 04:30:59,880 INFO L175 Difference]: Start difference. First operand has 226 places, 390 transitions, 5992 flow. Second operand 6 states and 98 transitions. [2024-06-28 04:30:59,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 405 transitions, 6972 flow [2024-06-28 04:31:00,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 405 transitions, 6794 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:00,605 INFO L231 Difference]: Finished difference. Result has 227 places, 393 transitions, 5931 flow [2024-06-28 04:31:00,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5814, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5931, PETRI_PLACES=227, PETRI_TRANSITIONS=393} [2024-06-28 04:31:00,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-28 04:31:00,605 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 393 transitions, 5931 flow [2024-06-28 04:31:00,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:00,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:00,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:00,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:31:00,606 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:00,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1014088042, now seen corresponding path program 2 times [2024-06-28 04:31:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829862150] [2024-06-28 04:31:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:00,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:00,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829862150] [2024-06-28 04:31:00,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829862150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:00,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:00,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:31:00,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292666983] [2024-06-28 04:31:00,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:00,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:31:00,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:00,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:31:00,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:31:01,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 393 transitions, 5931 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:01,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:01,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:01,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:02,086 INFO L124 PetriNetUnfolderBase]: 3692/5499 cut-off events. [2024-06-28 04:31:02,086 INFO L125 PetriNetUnfolderBase]: For 298118/298120 co-relation queries the response was YES. [2024-06-28 04:31:02,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46239 conditions, 5499 events. 3692/5499 cut-off events. For 298118/298120 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28621 event pairs, 985 based on Foata normal form. 1/5499 useless extension candidates. Maximal degree in co-relation 46125. Up to 5381 conditions per place. [2024-06-28 04:31:02,140 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 372 selfloop transitions, 26 changer transitions 0/401 dead transitions. [2024-06-28 04:31:02,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 401 transitions, 6751 flow [2024-06-28 04:31:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-28 04:31:02,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:31:02,142 INFO L175 Difference]: Start difference. First operand has 227 places, 393 transitions, 5931 flow. Second operand 6 states and 95 transitions. [2024-06-28 04:31:02,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 401 transitions, 6751 flow [2024-06-28 04:31:02,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 401 transitions, 6689 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:02,628 INFO L231 Difference]: Finished difference. Result has 229 places, 393 transitions, 5927 flow [2024-06-28 04:31:02,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5927, PETRI_PLACES=229, PETRI_TRANSITIONS=393} [2024-06-28 04:31:02,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-28 04:31:02,629 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 393 transitions, 5927 flow [2024-06-28 04:31:02,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:02,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:02,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:02,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:31:02,629 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:02,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1282044363, now seen corresponding path program 1 times [2024-06-28 04:31:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556005962] [2024-06-28 04:31:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:03,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:03,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556005962] [2024-06-28 04:31:03,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556005962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:03,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:03,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:03,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703108083] [2024-06-28 04:31:03,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:03,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:03,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:03,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:03,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 393 transitions, 5927 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:03,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:03,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:03,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:04,545 INFO L124 PetriNetUnfolderBase]: 4054/6064 cut-off events. [2024-06-28 04:31:04,545 INFO L125 PetriNetUnfolderBase]: For 374205/374216 co-relation queries the response was YES. [2024-06-28 04:31:04,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52279 conditions, 6064 events. 4054/6064 cut-off events. For 374205/374216 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32378 event pairs, 538 based on Foata normal form. 32/6095 useless extension candidates. Maximal degree in co-relation 52164. Up to 3122 conditions per place. [2024-06-28 04:31:04,621 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 351 selfloop transitions, 126 changer transitions 0/480 dead transitions. [2024-06-28 04:31:04,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 480 transitions, 8035 flow [2024-06-28 04:31:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 04:31:04,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-28 04:31:04,622 INFO L175 Difference]: Start difference. First operand has 229 places, 393 transitions, 5927 flow. Second operand 9 states and 175 transitions. [2024-06-28 04:31:04,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 480 transitions, 8035 flow [2024-06-28 04:31:05,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 480 transitions, 7960 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:05,261 INFO L231 Difference]: Finished difference. Result has 235 places, 420 transitions, 6674 flow [2024-06-28 04:31:05,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6674, PETRI_PLACES=235, PETRI_TRANSITIONS=420} [2024-06-28 04:31:05,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-28 04:31:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 420 transitions, 6674 flow [2024-06-28 04:31:05,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:05,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:05,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:05,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:31:05,263 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:05,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:05,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1280170413, now seen corresponding path program 2 times [2024-06-28 04:31:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:05,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955021768] [2024-06-28 04:31:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955021768] [2024-06-28 04:31:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955021768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635934480] [2024-06-28 04:31:05,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:05,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:06,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:06,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 420 transitions, 6674 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:06,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:06,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:06,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:07,423 INFO L124 PetriNetUnfolderBase]: 4359/6551 cut-off events. [2024-06-28 04:31:07,423 INFO L125 PetriNetUnfolderBase]: For 437721/437737 co-relation queries the response was YES. [2024-06-28 04:31:07,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59773 conditions, 6551 events. 4359/6551 cut-off events. For 437721/437737 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 35882 event pairs, 892 based on Foata normal form. 36/6586 useless extension candidates. Maximal degree in co-relation 59655. Up to 4586 conditions per place. [2024-06-28 04:31:07,519 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 352 selfloop transitions, 133 changer transitions 0/488 dead transitions. [2024-06-28 04:31:07,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 488 transitions, 8679 flow [2024-06-28 04:31:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 04:31:07,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-28 04:31:07,521 INFO L175 Difference]: Start difference. First operand has 235 places, 420 transitions, 6674 flow. Second operand 10 states and 192 transitions. [2024-06-28 04:31:07,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 488 transitions, 8679 flow [2024-06-28 04:31:08,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 488 transitions, 8534 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:08,676 INFO L231 Difference]: Finished difference. Result has 244 places, 426 transitions, 7073 flow [2024-06-28 04:31:08,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7073, PETRI_PLACES=244, PETRI_TRANSITIONS=426} [2024-06-28 04:31:08,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-28 04:31:08,677 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 426 transitions, 7073 flow [2024-06-28 04:31:08,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:08,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:08,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:08,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:31:08,678 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:08,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1843777545, now seen corresponding path program 3 times [2024-06-28 04:31:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:08,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840433628] [2024-06-28 04:31:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:08,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840433628] [2024-06-28 04:31:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840433628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115375981] [2024-06-28 04:31:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:09,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:09,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 426 transitions, 7073 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:09,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:09,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:09,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:11,213 INFO L124 PetriNetUnfolderBase]: 4671/7078 cut-off events. [2024-06-28 04:31:11,213 INFO L125 PetriNetUnfolderBase]: For 525446/525457 co-relation queries the response was YES. [2024-06-28 04:31:11,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63676 conditions, 7078 events. 4671/7078 cut-off events. For 525446/525457 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39548 event pairs, 1030 based on Foata normal form. 80/7157 useless extension candidates. Maximal degree in co-relation 63554. Up to 4475 conditions per place. [2024-06-28 04:31:11,286 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 312 selfloop transitions, 166 changer transitions 0/481 dead transitions. [2024-06-28 04:31:11,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 481 transitions, 8671 flow [2024-06-28 04:31:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 04:31:11,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-28 04:31:11,287 INFO L175 Difference]: Start difference. First operand has 244 places, 426 transitions, 7073 flow. Second operand 9 states and 182 transitions. [2024-06-28 04:31:11,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 481 transitions, 8671 flow [2024-06-28 04:31:12,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 481 transitions, 8437 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:12,218 INFO L231 Difference]: Finished difference. Result has 248 places, 428 transitions, 7276 flow [2024-06-28 04:31:12,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6839, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7276, PETRI_PLACES=248, PETRI_TRANSITIONS=428} [2024-06-28 04:31:12,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-28 04:31:12,219 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 428 transitions, 7276 flow [2024-06-28 04:31:12,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:12,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:12,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:12,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:31:12,220 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:12,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1756941585, now seen corresponding path program 4 times [2024-06-28 04:31:12,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:12,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271547898] [2024-06-28 04:31:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271547898] [2024-06-28 04:31:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271547898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:12,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:12,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960145888] [2024-06-28 04:31:12,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:12,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:12,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:12,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:12,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 428 transitions, 7276 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:12,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:12,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:12,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:14,738 INFO L124 PetriNetUnfolderBase]: 4983/7605 cut-off events. [2024-06-28 04:31:14,739 INFO L125 PetriNetUnfolderBase]: For 557111/557123 co-relation queries the response was YES. [2024-06-28 04:31:14,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67271 conditions, 7605 events. 4983/7605 cut-off events. For 557111/557123 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 43500 event pairs, 1177 based on Foata normal form. 82/7686 useless extension candidates. Maximal degree in co-relation 67147. Up to 5758 conditions per place. [2024-06-28 04:31:14,928 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 373 selfloop transitions, 105 changer transitions 0/481 dead transitions. [2024-06-28 04:31:14,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 481 transitions, 8882 flow [2024-06-28 04:31:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 04:31:14,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-28 04:31:14,930 INFO L175 Difference]: Start difference. First operand has 248 places, 428 transitions, 7276 flow. Second operand 9 states and 179 transitions. [2024-06-28 04:31:14,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 481 transitions, 8882 flow [2024-06-28 04:31:15,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 481 transitions, 8491 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:15,941 INFO L231 Difference]: Finished difference. Result has 250 places, 430 transitions, 7204 flow [2024-06-28 04:31:15,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6885, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7204, PETRI_PLACES=250, PETRI_TRANSITIONS=430} [2024-06-28 04:31:15,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-28 04:31:15,942 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 430 transitions, 7204 flow [2024-06-28 04:31:15,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:15,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:15,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:15,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:31:15,943 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:15,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:15,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085735, now seen corresponding path program 5 times [2024-06-28 04:31:15,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:15,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738408498] [2024-06-28 04:31:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:16,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738408498] [2024-06-28 04:31:16,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738408498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:16,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:16,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:16,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165558683] [2024-06-28 04:31:16,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:16,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:16,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 430 transitions, 7204 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:16,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:16,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:16,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:18,795 INFO L124 PetriNetUnfolderBase]: 4996/7629 cut-off events. [2024-06-28 04:31:18,795 INFO L125 PetriNetUnfolderBase]: For 499155/499167 co-relation queries the response was YES. [2024-06-28 04:31:18,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65966 conditions, 7629 events. 4996/7629 cut-off events. For 499155/499167 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 43720 event pairs, 1245 based on Foata normal form. 40/7668 useless extension candidates. Maximal degree in co-relation 65841. Up to 6431 conditions per place. [2024-06-28 04:31:18,885 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 379 selfloop transitions, 98 changer transitions 0/480 dead transitions. [2024-06-28 04:31:18,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 480 transitions, 8738 flow [2024-06-28 04:31:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:31:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:31:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 04:31:18,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-28 04:31:18,886 INFO L175 Difference]: Start difference. First operand has 250 places, 430 transitions, 7204 flow. Second operand 10 states and 183 transitions. [2024-06-28 04:31:18,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 480 transitions, 8738 flow [2024-06-28 04:31:20,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 480 transitions, 8465 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:20,067 INFO L231 Difference]: Finished difference. Result has 254 places, 433 transitions, 7282 flow [2024-06-28 04:31:20,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7282, PETRI_PLACES=254, PETRI_TRANSITIONS=433} [2024-06-28 04:31:20,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-28 04:31:20,068 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 433 transitions, 7282 flow [2024-06-28 04:31:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:20,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:20,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:31:20,069 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:20,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2009373434, now seen corresponding path program 1 times [2024-06-28 04:31:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:20,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922329654] [2024-06-28 04:31:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:20,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:20,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922329654] [2024-06-28 04:31:20,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922329654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:20,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:20,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010053428] [2024-06-28 04:31:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:20,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:20,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:20,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 433 transitions, 7282 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:20,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:20,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:20,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:22,372 INFO L124 PetriNetUnfolderBase]: 5016/7653 cut-off events. [2024-06-28 04:31:22,372 INFO L125 PetriNetUnfolderBase]: For 474416/474426 co-relation queries the response was YES. [2024-06-28 04:31:22,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66043 conditions, 7653 events. 5016/7653 cut-off events. For 474416/474426 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 43874 event pairs, 1283 based on Foata normal form. 14/7666 useless extension candidates. Maximal degree in co-relation 65916. Up to 7013 conditions per place. [2024-06-28 04:31:22,462 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 385 selfloop transitions, 76 changer transitions 0/464 dead transitions. [2024-06-28 04:31:22,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 464 transitions, 8614 flow [2024-06-28 04:31:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 04:31:22,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-28 04:31:22,463 INFO L175 Difference]: Start difference. First operand has 254 places, 433 transitions, 7282 flow. Second operand 7 states and 128 transitions. [2024-06-28 04:31:22,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 464 transitions, 8614 flow [2024-06-28 04:31:23,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 464 transitions, 8392 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:23,675 INFO L231 Difference]: Finished difference. Result has 255 places, 438 transitions, 7343 flow [2024-06-28 04:31:23,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7068, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7343, PETRI_PLACES=255, PETRI_TRANSITIONS=438} [2024-06-28 04:31:23,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 214 predicate places. [2024-06-28 04:31:23,676 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 438 transitions, 7343 flow [2024-06-28 04:31:23,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:23,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:23,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:23,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:31:23,677 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:23,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1914419629, now seen corresponding path program 6 times [2024-06-28 04:31:23,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:23,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36440971] [2024-06-28 04:31:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:23,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:24,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:24,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36440971] [2024-06-28 04:31:24,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36440971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:24,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:24,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:24,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924331449] [2024-06-28 04:31:24,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:24,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:24,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:24,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:24,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:24,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:24,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 438 transitions, 7343 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:24,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:24,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:24,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:26,476 INFO L124 PetriNetUnfolderBase]: 5244/8026 cut-off events. [2024-06-28 04:31:26,477 INFO L125 PetriNetUnfolderBase]: For 539785/539799 co-relation queries the response was YES. [2024-06-28 04:31:26,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69676 conditions, 8026 events. 5244/8026 cut-off events. For 539785/539799 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 46719 event pairs, 1091 based on Foata normal form. 36/8061 useless extension candidates. Maximal degree in co-relation 69548. Up to 6232 conditions per place. [2024-06-28 04:31:26,584 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 380 selfloop transitions, 116 changer transitions 0/499 dead transitions. [2024-06-28 04:31:26,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 499 transitions, 9277 flow [2024-06-28 04:31:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 04:31:26,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-28 04:31:26,591 INFO L175 Difference]: Start difference. First operand has 255 places, 438 transitions, 7343 flow. Second operand 9 states and 177 transitions. [2024-06-28 04:31:26,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 499 transitions, 9277 flow [2024-06-28 04:31:27,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 499 transitions, 9149 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:27,619 INFO L231 Difference]: Finished difference. Result has 261 places, 442 transitions, 7656 flow [2024-06-28 04:31:27,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7656, PETRI_PLACES=261, PETRI_TRANSITIONS=442} [2024-06-28 04:31:27,620 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-28 04:31:27,620 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 442 transitions, 7656 flow [2024-06-28 04:31:27,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:27,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:27,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:27,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:31:27,624 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:27,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1816940535, now seen corresponding path program 7 times [2024-06-28 04:31:27,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:27,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270478303] [2024-06-28 04:31:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:28,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:28,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270478303] [2024-06-28 04:31:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270478303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:28,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:28,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:28,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568621264] [2024-06-28 04:31:28,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:28,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:28,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:28,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:28,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:28,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 442 transitions, 7656 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:28,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:28,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:28,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:30,610 INFO L124 PetriNetUnfolderBase]: 5556/8544 cut-off events. [2024-06-28 04:31:30,611 INFO L125 PetriNetUnfolderBase]: For 642697/642711 co-relation queries the response was YES. [2024-06-28 04:31:30,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73555 conditions, 8544 events. 5556/8544 cut-off events. For 642697/642711 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 50558 event pairs, 1304 based on Foata normal form. 84/8627 useless extension candidates. Maximal degree in co-relation 73425. Up to 6302 conditions per place. [2024-06-28 04:31:30,701 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 349 selfloop transitions, 150 changer transitions 0/502 dead transitions. [2024-06-28 04:31:30,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 502 transitions, 9384 flow [2024-06-28 04:31:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 04:31:30,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-28 04:31:30,706 INFO L175 Difference]: Start difference. First operand has 261 places, 442 transitions, 7656 flow. Second operand 9 states and 186 transitions. [2024-06-28 04:31:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 502 transitions, 9384 flow [2024-06-28 04:31:32,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 502 transitions, 9156 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:32,356 INFO L231 Difference]: Finished difference. Result has 265 places, 444 transitions, 7843 flow [2024-06-28 04:31:32,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7430, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7843, PETRI_PLACES=265, PETRI_TRANSITIONS=444} [2024-06-28 04:31:32,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-28 04:31:32,357 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 444 transitions, 7843 flow [2024-06-28 04:31:32,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:32,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:32,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:32,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:31:32,358 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:32,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1908701617, now seen corresponding path program 1 times [2024-06-28 04:31:32,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:32,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720135348] [2024-06-28 04:31:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:32,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:33,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720135348] [2024-06-28 04:31:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720135348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:33,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:33,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:33,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199181599] [2024-06-28 04:31:33,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:33,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:33,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:33,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:33,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 444 transitions, 7843 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:33,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:33,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:33,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:35,301 INFO L124 PetriNetUnfolderBase]: 5584/8596 cut-off events. [2024-06-28 04:31:35,301 INFO L125 PetriNetUnfolderBase]: For 581555/581562 co-relation queries the response was YES. [2024-06-28 04:31:35,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74707 conditions, 8596 events. 5584/8596 cut-off events. For 581555/581562 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 51080 event pairs, 1516 based on Foata normal form. 12/8607 useless extension candidates. Maximal degree in co-relation 74575. Up to 7927 conditions per place. [2024-06-28 04:31:35,393 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 399 selfloop transitions, 74 changer transitions 0/476 dead transitions. [2024-06-28 04:31:35,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 476 transitions, 9103 flow [2024-06-28 04:31:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:31:35,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-28 04:31:35,395 INFO L175 Difference]: Start difference. First operand has 265 places, 444 transitions, 7843 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:31:35,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 476 transitions, 9103 flow [2024-06-28 04:31:36,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 476 transitions, 8736 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 04:31:36,531 INFO L231 Difference]: Finished difference. Result has 266 places, 447 transitions, 7750 flow [2024-06-28 04:31:36,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7476, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7750, PETRI_PLACES=266, PETRI_TRANSITIONS=447} [2024-06-28 04:31:36,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-28 04:31:36,532 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 447 transitions, 7750 flow [2024-06-28 04:31:36,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:36,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:36,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:36,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:31:36,533 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:36,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:36,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1908694177, now seen corresponding path program 2 times [2024-06-28 04:31:36,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:36,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629047655] [2024-06-28 04:31:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:36,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:37,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:37,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629047655] [2024-06-28 04:31:37,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629047655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:37,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:37,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:37,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592251077] [2024-06-28 04:31:37,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:37,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:37,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:37,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:37,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:37,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 447 transitions, 7750 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:37,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:37,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:37,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:39,129 INFO L124 PetriNetUnfolderBase]: 5650/8698 cut-off events. [2024-06-28 04:31:39,129 INFO L125 PetriNetUnfolderBase]: For 601609/601616 co-relation queries the response was YES. [2024-06-28 04:31:39,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75065 conditions, 8698 events. 5650/8698 cut-off events. For 601609/601616 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 51905 event pairs, 1517 based on Foata normal form. 12/8709 useless extension candidates. Maximal degree in co-relation 74932. Up to 7867 conditions per place. [2024-06-28 04:31:39,235 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 396 selfloop transitions, 85 changer transitions 0/484 dead transitions. [2024-06-28 04:31:39,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 484 transitions, 9349 flow [2024-06-28 04:31:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:31:39,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-28 04:31:39,246 INFO L175 Difference]: Start difference. First operand has 266 places, 447 transitions, 7750 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:31:39,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 484 transitions, 9349 flow [2024-06-28 04:31:40,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 484 transitions, 9105 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:40,577 INFO L231 Difference]: Finished difference. Result has 269 places, 453 transitions, 7943 flow [2024-06-28 04:31:40,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7506, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7943, PETRI_PLACES=269, PETRI_TRANSITIONS=453} [2024-06-28 04:31:40,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-28 04:31:40,577 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 453 transitions, 7943 flow [2024-06-28 04:31:40,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:40,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:40,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:40,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:31:40,578 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:40,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1817090637, now seen corresponding path program 3 times [2024-06-28 04:31:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:40,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150874752] [2024-06-28 04:31:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:40,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:41,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150874752] [2024-06-28 04:31:41,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150874752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:41,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:41,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874018359] [2024-06-28 04:31:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:41,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:41,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:41,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 453 transitions, 7943 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:41,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:41,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:41,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:43,521 INFO L124 PetriNetUnfolderBase]: 5640/8681 cut-off events. [2024-06-28 04:31:43,521 INFO L125 PetriNetUnfolderBase]: For 610819/610829 co-relation queries the response was YES. [2024-06-28 04:31:43,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75268 conditions, 8681 events. 5640/8681 cut-off events. For 610819/610829 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 51781 event pairs, 1509 based on Foata normal form. 16/8696 useless extension candidates. Maximal degree in co-relation 75133. Up to 8015 conditions per place. [2024-06-28 04:31:43,626 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 406 selfloop transitions, 78 changer transitions 0/487 dead transitions. [2024-06-28 04:31:43,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 487 transitions, 9253 flow [2024-06-28 04:31:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:31:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:31:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:31:43,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-28 04:31:43,628 INFO L175 Difference]: Start difference. First operand has 269 places, 453 transitions, 7943 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:31:43,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 487 transitions, 9253 flow [2024-06-28 04:31:45,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 487 transitions, 8937 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:45,291 INFO L231 Difference]: Finished difference. Result has 272 places, 453 transitions, 7791 flow [2024-06-28 04:31:45,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7627, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=272, PETRI_TRANSITIONS=453} [2024-06-28 04:31:45,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-28 04:31:45,292 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 453 transitions, 7791 flow [2024-06-28 04:31:45,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:45,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:45,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:45,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:31:45,293 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:45,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1908909379, now seen corresponding path program 8 times [2024-06-28 04:31:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:45,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560202023] [2024-06-28 04:31:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:46,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:46,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560202023] [2024-06-28 04:31:46,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560202023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:46,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:46,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:46,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936176852] [2024-06-28 04:31:46,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:46,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:46,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:46,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:46,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 453 transitions, 7791 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:46,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:46,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:46,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:48,205 INFO L124 PetriNetUnfolderBase]: 5764/8888 cut-off events. [2024-06-28 04:31:48,206 INFO L125 PetriNetUnfolderBase]: For 675241/675248 co-relation queries the response was YES. [2024-06-28 04:31:48,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77101 conditions, 8888 events. 5764/8888 cut-off events. For 675241/675248 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 53345 event pairs, 1540 based on Foata normal form. 36/8923 useless extension candidates. Maximal degree in co-relation 76965. Up to 7991 conditions per place. [2024-06-28 04:31:48,312 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 411 selfloop transitions, 79 changer transitions 0/493 dead transitions. [2024-06-28 04:31:48,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 493 transitions, 9129 flow [2024-06-28 04:31:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:31:48,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-28 04:31:48,313 INFO L175 Difference]: Start difference. First operand has 272 places, 453 transitions, 7791 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:31:48,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 493 transitions, 9129 flow [2024-06-28 04:31:49,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 493 transitions, 8981 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:49,676 INFO L231 Difference]: Finished difference. Result has 275 places, 455 transitions, 7924 flow [2024-06-28 04:31:49,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7643, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7924, PETRI_PLACES=275, PETRI_TRANSITIONS=455} [2024-06-28 04:31:49,677 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-28 04:31:49,677 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 455 transitions, 7924 flow [2024-06-28 04:31:49,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:49,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:49,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:49,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:31:49,678 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:49,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1914271759, now seen corresponding path program 9 times [2024-06-28 04:31:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:49,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959260774] [2024-06-28 04:31:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:50,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:50,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959260774] [2024-06-28 04:31:50,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959260774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:50,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:50,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:31:50,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972274149] [2024-06-28 04:31:50,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:31:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:31:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:31:50,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:50,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 455 transitions, 7924 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:50,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:50,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:50,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:52,597 INFO L124 PetriNetUnfolderBase]: 5888/9089 cut-off events. [2024-06-28 04:31:52,598 INFO L125 PetriNetUnfolderBase]: For 714002/714012 co-relation queries the response was YES. [2024-06-28 04:31:52,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79550 conditions, 9089 events. 5888/9089 cut-off events. For 714002/714012 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 54930 event pairs, 1547 based on Foata normal form. 40/9128 useless extension candidates. Maximal degree in co-relation 79413. Up to 8195 conditions per place. [2024-06-28 04:31:52,699 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 414 selfloop transitions, 83 changer transitions 0/500 dead transitions. [2024-06-28 04:31:52,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 500 transitions, 9422 flow [2024-06-28 04:31:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:31:52,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-28 04:31:52,700 INFO L175 Difference]: Start difference. First operand has 275 places, 455 transitions, 7924 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:31:52,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 500 transitions, 9422 flow [2024-06-28 04:31:54,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 500 transitions, 9206 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:54,147 INFO L231 Difference]: Finished difference. Result has 279 places, 457 transitions, 8001 flow [2024-06-28 04:31:54,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7708, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8001, PETRI_PLACES=279, PETRI_TRANSITIONS=457} [2024-06-28 04:31:54,147 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-28 04:31:54,148 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 457 transitions, 8001 flow [2024-06-28 04:31:54,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:54,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:54,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:54,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:31:54,148 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:54,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2141181252, now seen corresponding path program 1 times [2024-06-28 04:31:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:54,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341392449] [2024-06-28 04:31:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:54,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:54,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341392449] [2024-06-28 04:31:54,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341392449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:54,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:54,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:54,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646840272] [2024-06-28 04:31:54,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:54,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:54,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:54,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:54,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:54,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:54,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 457 transitions, 8001 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:54,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:54,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:54,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:56,734 INFO L124 PetriNetUnfolderBase]: 5898/9097 cut-off events. [2024-06-28 04:31:56,735 INFO L125 PetriNetUnfolderBase]: For 679122/679130 co-relation queries the response was YES. [2024-06-28 04:31:56,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79509 conditions, 9097 events. 5898/9097 cut-off events. For 679122/679130 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 54988 event pairs, 1792 based on Foata normal form. 10/9106 useless extension candidates. Maximal degree in co-relation 79371. Up to 8981 conditions per place. [2024-06-28 04:31:56,849 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 28 changer transitions 0/482 dead transitions. [2024-06-28 04:31:56,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 482 transitions, 9243 flow [2024-06-28 04:31:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 04:31:56,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-28 04:31:56,850 INFO L175 Difference]: Start difference. First operand has 279 places, 457 transitions, 8001 flow. Second operand 7 states and 113 transitions. [2024-06-28 04:31:56,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 482 transitions, 9243 flow [2024-06-28 04:31:58,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 482 transitions, 8956 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-28 04:31:58,190 INFO L231 Difference]: Finished difference. Result has 278 places, 462 transitions, 7880 flow [2024-06-28 04:31:58,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7716, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7880, PETRI_PLACES=278, PETRI_TRANSITIONS=462} [2024-06-28 04:31:58,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-28 04:31:58,191 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 462 transitions, 7880 flow [2024-06-28 04:31:58,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:58,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:58,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:58,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:31:58,192 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:58,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2141180880, now seen corresponding path program 2 times [2024-06-28 04:31:58,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:58,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279642560] [2024-06-28 04:31:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:58,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:58,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:58,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279642560] [2024-06-28 04:31:58,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279642560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:58,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:58,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:58,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929440213] [2024-06-28 04:31:58,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:58,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:58,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:58,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:31:58,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 462 transitions, 7880 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:58,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:58,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:31:58,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:00,982 INFO L124 PetriNetUnfolderBase]: 5964/9198 cut-off events. [2024-06-28 04:32:00,982 INFO L125 PetriNetUnfolderBase]: For 673384/673391 co-relation queries the response was YES. [2024-06-28 04:32:01,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79262 conditions, 9198 events. 5964/9198 cut-off events. For 673384/673391 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 55652 event pairs, 1570 based on Foata normal form. 10/9207 useless extension candidates. Maximal degree in co-relation 79124. Up to 8509 conditions per place. [2024-06-28 04:32:01,097 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 406 selfloop transitions, 85 changer transitions 0/494 dead transitions. [2024-06-28 04:32:01,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 494 transitions, 9428 flow [2024-06-28 04:32:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:32:01,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-28 04:32:01,098 INFO L175 Difference]: Start difference. First operand has 278 places, 462 transitions, 7880 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:32:01,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 494 transitions, 9428 flow [2024-06-28 04:32:02,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 494 transitions, 9363 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 04:32:02,516 INFO L231 Difference]: Finished difference. Result has 283 places, 475 transitions, 8319 flow [2024-06-28 04:32:02,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7815, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8319, PETRI_PLACES=283, PETRI_TRANSITIONS=475} [2024-06-28 04:32:02,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-28 04:32:02,517 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 475 transitions, 8319 flow [2024-06-28 04:32:02,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:02,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:02,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:32:02,518 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:02,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1732131937, now seen corresponding path program 4 times [2024-06-28 04:32:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298288203] [2024-06-28 04:32:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:03,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:03,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298288203] [2024-06-28 04:32:03,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298288203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:03,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:03,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:03,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519715550] [2024-06-28 04:32:03,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:03,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:03,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:32:03,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 475 transitions, 8319 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:03,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:03,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:32:03,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:05,679 INFO L124 PetriNetUnfolderBase]: 5964/9198 cut-off events. [2024-06-28 04:32:05,679 INFO L125 PetriNetUnfolderBase]: For 691984/691988 co-relation queries the response was YES. [2024-06-28 04:32:05,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79909 conditions, 9198 events. 5964/9198 cut-off events. For 691984/691988 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55685 event pairs, 1873 based on Foata normal form. 10/9207 useless extension candidates. Maximal degree in co-relation 79768. Up to 9019 conditions per place. [2024-06-28 04:32:05,803 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 470 selfloop transitions, 30 changer transitions 0/503 dead transitions. [2024-06-28 04:32:05,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 503 transitions, 9535 flow [2024-06-28 04:32:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:32:05,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 04:32:05,804 INFO L175 Difference]: Start difference. First operand has 283 places, 475 transitions, 8319 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:32:05,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 503 transitions, 9535 flow [2024-06-28 04:32:07,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 503 transitions, 9371 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:07,433 INFO L231 Difference]: Finished difference. Result has 287 places, 478 transitions, 8359 flow [2024-06-28 04:32:07,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8155, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8359, PETRI_PLACES=287, PETRI_TRANSITIONS=478} [2024-06-28 04:32:07,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-28 04:32:07,434 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 478 transitions, 8359 flow [2024-06-28 04:32:07,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:07,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:07,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:07,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:32:07,435 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:07,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1109601727, now seen corresponding path program 5 times [2024-06-28 04:32:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244479211] [2024-06-28 04:32:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:08,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:08,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244479211] [2024-06-28 04:32:08,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244479211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:08,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:08,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:08,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316562780] [2024-06-28 04:32:08,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:08,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:08,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:08,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:08,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:08,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:32:08,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 478 transitions, 8359 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:08,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:08,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:32:08,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:10,362 INFO L124 PetriNetUnfolderBase]: 5989/9237 cut-off events. [2024-06-28 04:32:10,363 INFO L125 PetriNetUnfolderBase]: For 716243/716247 co-relation queries the response was YES. [2024-06-28 04:32:10,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80286 conditions, 9237 events. 5989/9237 cut-off events. For 716243/716247 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 55803 event pairs, 1813 based on Foata normal form. 10/9246 useless extension candidates. Maximal degree in co-relation 80145. Up to 9034 conditions per place. [2024-06-28 04:32:10,482 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 33 changer transitions 0/506 dead transitions. [2024-06-28 04:32:10,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 506 transitions, 9567 flow [2024-06-28 04:32:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:32:10,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 04:32:10,492 INFO L175 Difference]: Start difference. First operand has 287 places, 478 transitions, 8359 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:32:10,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 506 transitions, 9567 flow [2024-06-28 04:32:12,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 506 transitions, 9403 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:12,109 INFO L231 Difference]: Finished difference. Result has 291 places, 481 transitions, 8395 flow [2024-06-28 04:32:12,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8395, PETRI_PLACES=291, PETRI_TRANSITIONS=481} [2024-06-28 04:32:12,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-28 04:32:12,110 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 481 transitions, 8395 flow [2024-06-28 04:32:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:12,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:12,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:32:12,110 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:12,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1100397517, now seen corresponding path program 6 times [2024-06-28 04:32:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:12,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476800224] [2024-06-28 04:32:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:13,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:13,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476800224] [2024-06-28 04:32:13,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476800224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:13,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:13,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:13,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610336038] [2024-06-28 04:32:13,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:13,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:13,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:13,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 04:32:13,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 481 transitions, 8395 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:13,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:13,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 04:32:13,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand