./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:31:28,267 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:31:28,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:31:28,326 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:31:28,326 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:31:28,351 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:31:28,352 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:31:28,352 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:31:28,353 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:31:28,356 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:31:28,356 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:31:28,356 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:31:28,357 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:31:28,358 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:31:28,358 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:31:28,359 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:31:28,359 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:31:28,359 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:31:28,359 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:31:28,359 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:31:28,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:31:28,360 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:31:28,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:31:28,360 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:31:28,360 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:31:28,360 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:31:28,360 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:31:28,361 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:31:28,361 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:31:28,361 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:31:28,362 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:31:28,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:31:28,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:31:28,362 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:31:28,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:31:28,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:31:28,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:31:28,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:31:28,363 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:31:28,363 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:31:28,363 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:31:28,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:31:28,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:31:28,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:31:28,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:31:28,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:31:28,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:31:28,622 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:31:28,622 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:31:28,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 04:31:29,680 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:31:29,908 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:31:29,924 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 04:31:29,940 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6e703003/b92da06f16b24cfe9e8b1a85ba438762/FLAGd6e43cfe4 [2024-06-28 04:31:29,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6e703003/b92da06f16b24cfe9e8b1a85ba438762 [2024-06-28 04:31:29,951 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:31:29,955 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:31:29,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-28 04:31:30,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:31:30,085 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:31:30,086 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:31:30,086 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:31:30,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:31:30,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:31:29" (1/2) ... [2024-06-28 04:31:30,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@943ebf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:31:30, skipping insertion in model container [2024-06-28 04:31:30,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:31:29" (1/2) ... [2024-06-28 04:31:30,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21f1fb63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:31:30, skipping insertion in model container [2024-06-28 04:31:30,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:31:30" (2/2) ... [2024-06-28 04:31:30,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@943ebf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:31:30, skipping insertion in model container [2024-06-28 04:31:30,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:31:30" (2/2) ... [2024-06-28 04:31:30,094 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:31:30,167 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:31:30,168 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:31:30,168 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:31:30,168 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 04:31:30,168 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:31:30,169 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-28 04:31:30,206 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:31:30,538 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:31:30,545 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:31:30,682 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:31:30,715 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:31:30,715 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:31:30 WrapperNode [2024-06-28 04:31:30,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:31:30,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:31:30,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:31:30,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:31:30,721 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,736 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,776 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-28 04:31:30,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:31:30,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:31:30,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:31:30,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:31:30,785 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,785 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,788 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,843 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 04:31:30,843 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,843 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,865 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,874 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,876 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,878 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:31:30,881 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:31:30,882 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:31:30,882 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:31:30,896 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 04:31:30" (1/1) ... [2024-06-28 04:31:30,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:31:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:31:30,918 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 04:31:30,931 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 04:31:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:31:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:31:30,957 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:31:30,958 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:31:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:31:30,958 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:31:30,958 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:31:30,959 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:31:30,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:31:30,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:31:30,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:31:30,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:31:30,960 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 04:31:31,057 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:31:31,059 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:31:31,391 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:31:31,392 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:31:31,571 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:31:31,571 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:31:31,573 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:31:31 BoogieIcfgContainer [2024-06-28 04:31:31,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:31:31,575 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:31:31,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:31:31,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:31:31,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:31:29" (1/4) ... [2024-06-28 04:31:31,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1334fd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:31:31, skipping insertion in model container [2024-06-28 04:31:31,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:31:30" (2/4) ... [2024-06-28 04:31:31,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1334fd44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:31:31, skipping insertion in model container [2024-06-28 04:31:31,579 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 04:31:30" (3/4) ... [2024-06-28 04:31:31,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1334fd44 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:31:31, skipping insertion in model container [2024-06-28 04:31:31,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:31:31" (4/4) ... [2024-06-28 04:31:31,580 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 04:31:31,593 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:31:31,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 04:31:31,593 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:31:31,634 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:31:31,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:31:31,687 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 04:31:31,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:31:31,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:31:31,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 04:31:31,692 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 04:31:31,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:31:31,705 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;@aaf23a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:31:31,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 04:31:31,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:31:31,708 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 04:31:31,708 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:31:31,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:31,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:31:31,709 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 04:31:31,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash 443717112, now seen corresponding path program 1 times [2024-06-28 04:31:31,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:31,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814167887] [2024-06-28 04:31:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:31,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:32,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:32,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814167887] [2024-06-28 04:31:32,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814167887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:32,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:32,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:31:32,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308523202] [2024-06-28 04:31:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:32,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:31:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:31:32,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:31:32,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 04:31:32,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:32,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:32,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 04:31:32,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:32,973 INFO L124 PetriNetUnfolderBase]: 1602/2410 cut-off events. [2024-06-28 04:31:32,974 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-06-28 04:31:32,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4887 conditions, 2410 events. 1602/2410 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11695 event pairs, 1117 based on Foata normal form. 1/2370 useless extension candidates. Maximal degree in co-relation 4875. Up to 2382 conditions per place. [2024-06-28 04:31:32,994 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-28 04:31:32,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-28 04:31:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:31:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:31:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-28 04:31:33,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-28 04:31:33,006 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-28 04:31:33,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-28 04:31:33,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:33,011 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 04:31:33,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 04:31:33,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 04:31:33,015 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 04:31:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:33,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:33,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:33,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:31:33,016 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 04:31:33,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1210425239, now seen corresponding path program 1 times [2024-06-28 04:31:33,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:33,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507990338] [2024-06-28 04:31:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:33,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:33,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:33,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507990338] [2024-06-28 04:31:33,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507990338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:33,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:33,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 04:31:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053354185] [2024-06-28 04:31:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:33,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 04:31:33,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 04:31:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 04:31:33,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 04:31:33,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:33,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:33,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 04:31:33,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:33,748 INFO L124 PetriNetUnfolderBase]: 1590/2392 cut-off events. [2024-06-28 04:31:33,748 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-06-28 04:31:33,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5468 conditions, 2392 events. 1590/2392 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11560 event pairs, 869 based on Foata normal form. 6/2396 useless extension candidates. Maximal degree in co-relation 5456. Up to 2334 conditions per place. [2024-06-28 04:31:33,761 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-28 04:31:33,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 246 flow [2024-06-28 04:31:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:31:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:31:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-28 04:31:33,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-28 04:31:33,765 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 95 transitions. [2024-06-28 04:31:33,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 246 flow [2024-06-28 04:31:33,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:31:33,768 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 04:31:33,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 04:31:33,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 04:31:33,769 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 04:31:33,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:33,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:33,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:33,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:31:33,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:33,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1573673233, now seen corresponding path program 1 times [2024-06-28 04:31:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:33,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480608383] [2024-06-28 04:31:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:33,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:34,254 INFO 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 04:31:34,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:34,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480608383] [2024-06-28 04:31:34,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480608383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:34,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:34,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:31:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013424821] [2024-06-28 04:31:34,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:34,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:31:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:31:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:31:34,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:34,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:34,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:34,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:34,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:34,693 INFO L124 PetriNetUnfolderBase]: 1580/2378 cut-off events. [2024-06-28 04:31:34,694 INFO L125 PetriNetUnfolderBase]: For 1240/1240 co-relation queries the response was YES. [2024-06-28 04:31:34,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 2378 events. 1580/2378 cut-off events. For 1240/1240 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11454 event pairs, 980 based on Foata normal form. 4/2380 useless extension candidates. Maximal degree in co-relation 6029. Up to 2332 conditions per place. [2024-06-28 04:31:34,704 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-06-28 04:31:34,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 278 flow [2024-06-28 04:31:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:31:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:31:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-28 04:31:34,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 04:31:34,709 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 93 transitions. [2024-06-28 04:31:34,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 278 flow [2024-06-28 04:31:34,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 264 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:34,712 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 166 flow [2024-06-28 04:31:34,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 04:31:34,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-28 04:31:34,713 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 166 flow [2024-06-28 04:31:34,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:34,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:34,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:34,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:31:34,714 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 04:31:34,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2032207573, now seen corresponding path program 1 times [2024-06-28 04:31:34,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:34,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011873528] [2024-06-28 04:31:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:34,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:35,516 INFO 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 04:31:35,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011873528] [2024-06-28 04:31:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011873528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:35,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:31:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174824335] [2024-06-28 04:31:35,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:31:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:31:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:31:35,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-28 04:31:35,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:35,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:35,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-28 04:31:35,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:35,945 INFO L124 PetriNetUnfolderBase]: 1571/2363 cut-off events. [2024-06-28 04:31:35,945 INFO L125 PetriNetUnfolderBase]: For 2282/2282 co-relation queries the response was YES. [2024-06-28 04:31:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6556 conditions, 2363 events. 1571/2363 cut-off events. For 2282/2282 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11439 event pairs, 568 based on Foata normal form. 6/2367 useless extension candidates. Maximal degree in co-relation 6540. Up to 2275 conditions per place. [2024-06-28 04:31:35,957 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-28 04:31:35,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 382 flow [2024-06-28 04:31:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-28 04:31:35,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-28 04:31:35,960 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 166 flow. Second operand 6 states and 132 transitions. [2024-06-28 04:31:35,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 382 flow [2024-06-28 04:31:35,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 364 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:35,964 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-28 04:31:35,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 04:31:35,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 04:31:35,966 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-28 04:31:35,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:35,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:35,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:31:35,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:35,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -949121200, now seen corresponding path program 1 times [2024-06-28 04:31:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:35,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543228307] [2024-06-28 04:31:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:36,479 INFO 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 04:31:36,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:36,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543228307] [2024-06-28 04:31:36,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543228307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:36,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:36,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:31:36,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11639444] [2024-06-28 04:31:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:31:36,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:31:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:31:36,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:36,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:36,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:36,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:36,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:37,017 INFO L124 PetriNetUnfolderBase]: 1593/2407 cut-off events. [2024-06-28 04:31:37,017 INFO L125 PetriNetUnfolderBase]: For 3833/3836 co-relation queries the response was YES. [2024-06-28 04:31:37,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7247 conditions, 2407 events. 1593/2407 cut-off events. For 3833/3836 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11787 event pairs, 672 based on Foata normal form. 6/2409 useless extension candidates. Maximal degree in co-relation 7229. Up to 2287 conditions per place. [2024-06-28 04:31:37,029 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-28 04:31:37,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 455 flow [2024-06-28 04:31:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-28 04:31:37,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 04:31:37,031 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 6 states and 117 transitions. [2024-06-28 04:31:37,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 455 flow [2024-06-28 04:31:37,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 426 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:37,039 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-28 04:31:37,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-28 04:31:37,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-28 04:31:37,041 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-28 04:31:37,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:37,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:37,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:37,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:31:37,043 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 04:31:37,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:37,043 INFO L85 PathProgramCache]: Analyzing trace with hash -455083810, now seen corresponding path program 2 times [2024-06-28 04:31:37,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:37,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877256943] [2024-06-28 04:31:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:37,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877256943] [2024-06-28 04:31:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877256943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:37,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:37,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:31:37,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280568373] [2024-06-28 04:31:37,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:37,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:31:37,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:31:37,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:31:37,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:37,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:37,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:37,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:37,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:38,101 INFO L124 PetriNetUnfolderBase]: 1583/2386 cut-off events. [2024-06-28 04:31:38,102 INFO L125 PetriNetUnfolderBase]: For 5536/5536 co-relation queries the response was YES. [2024-06-28 04:31:38,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7744 conditions, 2386 events. 1583/2386 cut-off events. For 5536/5536 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11711 event pairs, 671 based on Foata normal form. 4/2386 useless extension candidates. Maximal degree in co-relation 7724. Up to 2279 conditions per place. [2024-06-28 04:31:38,117 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 48 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-28 04:31:38,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 430 flow [2024-06-28 04:31:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 04:31:38,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:31:38,118 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 111 transitions. [2024-06-28 04:31:38,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 430 flow [2024-06-28 04:31:38,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 400 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:38,124 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-28 04:31:38,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-28 04:31:38,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 04:31:38,126 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-28 04:31:38,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:38,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:38,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:38,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:31:38,127 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 04:31:38,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash -942446032, now seen corresponding path program 1 times [2024-06-28 04:31:38,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:38,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234091733] [2024-06-28 04:31:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:38,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:39,081 INFO 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 04:31:39,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234091733] [2024-06-28 04:31:39,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234091733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:39,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:39,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:39,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116269409] [2024-06-28 04:31:39,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:39,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:39,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:39,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:39,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:39,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:39,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:39,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:39,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:39,602 INFO L124 PetriNetUnfolderBase]: 1573/2377 cut-off events. [2024-06-28 04:31:39,602 INFO L125 PetriNetUnfolderBase]: For 6558/6558 co-relation queries the response was YES. [2024-06-28 04:31:39,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7825 conditions, 2377 events. 1573/2377 cut-off events. For 6558/6558 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11621 event pairs, 643 based on Foata normal form. 4/2379 useless extension candidates. Maximal degree in co-relation 7803. Up to 2303 conditions per place. [2024-06-28 04:31:39,617 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 56 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-28 04:31:39,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 466 flow [2024-06-28 04:31:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 04:31:39,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-28 04:31:39,618 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 6 states and 109 transitions. [2024-06-28 04:31:39,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 466 flow [2024-06-28 04:31:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 422 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:39,625 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 282 flow [2024-06-28 04:31:39,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-28 04:31:39,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-28 04:31:39,626 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 282 flow [2024-06-28 04:31:39,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:39,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:39,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:39,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:31:39,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:39,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:39,627 INFO L85 PathProgramCache]: Analyzing trace with hash 231620195, now seen corresponding path program 1 times [2024-06-28 04:31:39,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:39,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113073969] [2024-06-28 04:31:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:39,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:40,081 INFO 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 04:31:40,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:40,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113073969] [2024-06-28 04:31:40,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113073969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:40,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:31:40,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130338943] [2024-06-28 04:31:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:31:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:31:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:31:40,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:40,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:40,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:40,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:40,471 INFO L124 PetriNetUnfolderBase]: 1570/2373 cut-off events. [2024-06-28 04:31:40,472 INFO L125 PetriNetUnfolderBase]: For 7824/7824 co-relation queries the response was YES. [2024-06-28 04:31:40,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8277 conditions, 2373 events. 1570/2373 cut-off events. For 7824/7824 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11531 event pairs, 683 based on Foata normal form. 1/2372 useless extension candidates. Maximal degree in co-relation 8255. Up to 2332 conditions per place. [2024-06-28 04:31:40,482 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-28 04:31:40,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 442 flow [2024-06-28 04:31:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:31:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:31:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 04:31:40,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 04:31:40,484 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 282 flow. Second operand 5 states and 87 transitions. [2024-06-28 04:31:40,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 442 flow [2024-06-28 04:31:40,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 410 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:40,490 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 296 flow [2024-06-28 04:31:40,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-28 04:31:40,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-28 04:31:40,491 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 296 flow [2024-06-28 04:31:40,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:40,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:40,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:40,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:31:40,492 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 04:31:40,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash 797315967, now seen corresponding path program 1 times [2024-06-28 04:31:40,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:40,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303002067] [2024-06-28 04:31:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:40,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:41,179 INFO 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 04:31:41,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:41,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303002067] [2024-06-28 04:31:41,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303002067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:41,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:41,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:41,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347081406] [2024-06-28 04:31:41,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:41,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:41,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:41,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:41,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:41,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:41,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:41,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:41,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:41,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:41,684 INFO L124 PetriNetUnfolderBase]: 1592/2415 cut-off events. [2024-06-28 04:31:41,684 INFO L125 PetriNetUnfolderBase]: For 9701/9701 co-relation queries the response was YES. [2024-06-28 04:31:41,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8827 conditions, 2415 events. 1592/2415 cut-off events. For 9701/9701 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11856 event pairs, 670 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 8804. Up to 2319 conditions per place. [2024-06-28 04:31:41,694 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-28 04:31:41,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 550 flow [2024-06-28 04:31:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:31:41,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 04:31:41,695 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 296 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:31:41,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 550 flow [2024-06-28 04:31:41,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 526 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:41,702 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 338 flow [2024-06-28 04:31:41,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-28 04:31:41,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-28 04:31:41,703 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 338 flow [2024-06-28 04:31:41,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:41,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:41,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:31:41,704 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 04:31:41,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1572374993, now seen corresponding path program 2 times [2024-06-28 04:31:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181859881] [2024-06-28 04:31:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:42,482 INFO 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 04:31:42,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:42,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181859881] [2024-06-28 04:31:42,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181859881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:42,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:42,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:42,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581510640] [2024-06-28 04:31:42,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:42,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:42,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:42,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:42,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:42,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:42,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 338 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:42,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:42,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:42,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:43,082 INFO L124 PetriNetUnfolderBase]: 1614/2459 cut-off events. [2024-06-28 04:31:43,083 INFO L125 PetriNetUnfolderBase]: For 12283/12289 co-relation queries the response was YES. [2024-06-28 04:31:43,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9560 conditions, 2459 events. 1614/2459 cut-off events. For 12283/12289 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12137 event pairs, 620 based on Foata normal form. 8/2463 useless extension candidates. Maximal degree in co-relation 9536. Up to 2240 conditions per place. [2024-06-28 04:31:43,094 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-28 04:31:43,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 95 transitions, 680 flow [2024-06-28 04:31:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 04:31:43,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-28 04:31:43,096 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 338 flow. Second operand 7 states and 136 transitions. [2024-06-28 04:31:43,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 95 transitions, 680 flow [2024-06-28 04:31:43,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 638 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:43,101 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 422 flow [2024-06-28 04:31:43,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-06-28 04:31:43,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-28 04:31:43,103 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 422 flow [2024-06-28 04:31:43,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:43,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:43,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:43,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:31:43,104 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 04:31:43,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash 802084511, now seen corresponding path program 1 times [2024-06-28 04:31:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:43,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670227702] [2024-06-28 04:31:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:43,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670227702] [2024-06-28 04:31:43,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670227702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:43,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:43,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146584459] [2024-06-28 04:31:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:43,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:43,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:44,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:44,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 422 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:44,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:44,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:44,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:44,679 INFO L124 PetriNetUnfolderBase]: 1636/2491 cut-off events. [2024-06-28 04:31:44,680 INFO L125 PetriNetUnfolderBase]: For 15672/15678 co-relation queries the response was YES. [2024-06-28 04:31:44,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10246 conditions, 2491 events. 1636/2491 cut-off events. For 15672/15678 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12347 event pairs, 594 based on Foata normal form. 5/2492 useless extension candidates. Maximal degree in co-relation 10221. Up to 2287 conditions per place. [2024-06-28 04:31:44,692 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 23 changer transitions 0/103 dead transitions. [2024-06-28 04:31:44,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 780 flow [2024-06-28 04:31:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 04:31:44,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-28 04:31:44,694 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 422 flow. Second operand 7 states and 138 transitions. [2024-06-28 04:31:44,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 780 flow [2024-06-28 04:31:44,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 103 transitions, 740 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:44,704 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 494 flow [2024-06-28 04:31:44,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=494, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-28 04:31:44,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-28 04:31:44,705 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 494 flow [2024-06-28 04:31:44,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:44,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:44,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:44,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:31:44,706 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 04:31:44,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash 474097937, now seen corresponding path program 3 times [2024-06-28 04:31:44,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:44,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124963710] [2024-06-28 04:31:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:45,298 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 04:31:45,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:45,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124963710] [2024-06-28 04:31:45,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124963710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:45,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:45,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:45,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029225720] [2024-06-28 04:31:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:45,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:45,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:45,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:45,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:45,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 494 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:45,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:45,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:45,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:45,857 INFO L124 PetriNetUnfolderBase]: 1626/2465 cut-off events. [2024-06-28 04:31:45,857 INFO L125 PetriNetUnfolderBase]: For 18268/18268 co-relation queries the response was YES. [2024-06-28 04:31:45,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10710 conditions, 2465 events. 1626/2465 cut-off events. For 18268/18268 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12181 event pairs, 573 based on Foata normal form. 4/2463 useless extension candidates. Maximal degree in co-relation 10683. Up to 2264 conditions per place. [2024-06-28 04:31:45,871 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-28 04:31:45,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 728 flow [2024-06-28 04:31:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:31:45,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 04:31:45,874 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 494 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:31:45,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 728 flow [2024-06-28 04:31:45,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 678 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 04:31:45,889 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 504 flow [2024-06-28 04:31:45,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-06-28 04:31:45,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 04:31:45,890 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 504 flow [2024-06-28 04:31:45,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 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 04:31:45,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:45,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:45,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:31:45,890 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 04:31:45,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 547195505, now seen corresponding path program 2 times [2024-06-28 04:31:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:45,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943252399] [2024-06-28 04:31:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:45,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:46,775 INFO 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 04:31:46,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:46,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943252399] [2024-06-28 04:31:46,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943252399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:46,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:46,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:46,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334414314] [2024-06-28 04:31:46,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:46,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:46,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:46,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:46,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:46,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 504 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:46,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:46,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:46,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:47,436 INFO L124 PetriNetUnfolderBase]: 1648/2512 cut-off events. [2024-06-28 04:31:47,436 INFO L125 PetriNetUnfolderBase]: For 20942/20942 co-relation queries the response was YES. [2024-06-28 04:31:47,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11139 conditions, 2512 events. 1648/2512 cut-off events. For 20942/20942 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12456 event pairs, 583 based on Foata normal form. 4/2512 useless extension candidates. Maximal degree in co-relation 11110. Up to 2292 conditions per place. [2024-06-28 04:31:47,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-28 04:31:47,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 838 flow [2024-06-28 04:31:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 04:31:47,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-28 04:31:47,453 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 504 flow. Second operand 7 states and 134 transitions. [2024-06-28 04:31:47,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 838 flow [2024-06-28 04:31:47,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 770 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:47,465 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 528 flow [2024-06-28 04:31:47,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-28 04:31:47,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-28 04:31:47,465 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 528 flow [2024-06-28 04:31:47,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:47,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:47,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:47,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:31:47,466 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:47,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:47,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2092163891, now seen corresponding path program 3 times [2024-06-28 04:31:47,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273998337] [2024-06-28 04:31:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:47,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:48,358 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 04:31:48,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273998337] [2024-06-28 04:31:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273998337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:48,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:48,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:48,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669979696] [2024-06-28 04:31:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:48,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:48,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:48,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:48,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:48,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:48,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:48,914 INFO L124 PetriNetUnfolderBase]: 1638/2498 cut-off events. [2024-06-28 04:31:48,914 INFO L125 PetriNetUnfolderBase]: For 23182/23182 co-relation queries the response was YES. [2024-06-28 04:31:48,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11250 conditions, 2498 events. 1638/2498 cut-off events. For 23182/23182 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12422 event pairs, 588 based on Foata normal form. 4/2498 useless extension candidates. Maximal degree in co-relation 11220. Up to 2284 conditions per place. [2024-06-28 04:31:48,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 27 changer transitions 0/98 dead transitions. [2024-06-28 04:31:48,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 768 flow [2024-06-28 04:31:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 04:31:48,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-28 04:31:48,935 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 528 flow. Second operand 7 states and 129 transitions. [2024-06-28 04:31:48,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 768 flow [2024-06-28 04:31:48,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 680 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:48,955 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 502 flow [2024-06-28 04:31:48,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2024-06-28 04:31:48,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-28 04:31:48,956 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 502 flow [2024-06-28 04:31:48,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:48,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:48,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:48,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:31:48,957 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 04:31:48,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:48,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2092152979, now seen corresponding path program 1 times [2024-06-28 04:31:48,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:48,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62490558] [2024-06-28 04:31:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:48,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:50,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62490558] [2024-06-28 04:31:50,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62490558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:50,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:50,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:50,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994558236] [2024-06-28 04:31:50,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:50,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:50,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:50,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 502 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:50,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:50,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:50,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:50,769 INFO L124 PetriNetUnfolderBase]: 1630/2491 cut-off events. [2024-06-28 04:31:50,769 INFO L125 PetriNetUnfolderBase]: For 25285/25285 co-relation queries the response was YES. [2024-06-28 04:31:50,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11298 conditions, 2491 events. 1630/2491 cut-off events. For 25285/25285 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12371 event pairs, 592 based on Foata normal form. 4/2493 useless extension candidates. Maximal degree in co-relation 11267. Up to 2369 conditions per place. [2024-06-28 04:31:50,783 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 82 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2024-06-28 04:31:50,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 776 flow [2024-06-28 04:31:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 04:31:50,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 04:31:50,786 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 502 flow. Second operand 7 states and 125 transitions. [2024-06-28 04:31:50,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 776 flow [2024-06-28 04:31:50,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 712 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 04:31:50,798 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 505 flow [2024-06-28 04:31:50,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2024-06-28 04:31:50,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-28 04:31:50,799 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 505 flow [2024-06-28 04:31:50,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:50,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:50,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:31:50,800 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:50,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1409706771, now seen corresponding path program 1 times [2024-06-28 04:31:50,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:50,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052523580] [2024-06-28 04:31:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:51,311 INFO 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 04:31:51,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:51,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052523580] [2024-06-28 04:31:51,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052523580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:51,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:51,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:31:51,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561607607] [2024-06-28 04:31:51,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:51,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:31:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:51,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:31:51,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:31:51,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:51,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 505 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:51,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:51,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:51,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:51,767 INFO L124 PetriNetUnfolderBase]: 1657/2530 cut-off events. [2024-06-28 04:31:51,767 INFO L125 PetriNetUnfolderBase]: For 28825/28825 co-relation queries the response was YES. [2024-06-28 04:31:51,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11740 conditions, 2530 events. 1657/2530 cut-off events. For 28825/28825 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12549 event pairs, 656 based on Foata normal form. 3/2529 useless extension candidates. Maximal degree in co-relation 11708. Up to 2409 conditions per place. [2024-06-28 04:31:51,781 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 76 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-28 04:31:51,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 98 transitions, 813 flow [2024-06-28 04:31:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 04:31:51,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 04:31:51,783 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 505 flow. Second operand 6 states and 107 transitions. [2024-06-28 04:31:51,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 98 transitions, 813 flow [2024-06-28 04:31:51,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 764 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:51,797 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 573 flow [2024-06-28 04:31:51,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-28 04:31:51,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-28 04:31:51,798 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 573 flow [2024-06-28 04:31:51,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:51,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:51,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:51,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:31:51,800 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:51,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1832510300, now seen corresponding path program 1 times [2024-06-28 04:31:51,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:51,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755936449] [2024-06-28 04:31:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:51,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:52,323 INFO 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 04:31:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:52,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755936449] [2024-06-28 04:31:52,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755936449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:52,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:52,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:52,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695567713] [2024-06-28 04:31:52,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:52,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:52,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:52,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 573 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:52,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:52,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:52,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:52,734 INFO L124 PetriNetUnfolderBase]: 1679/2556 cut-off events. [2024-06-28 04:31:52,734 INFO L125 PetriNetUnfolderBase]: For 32944/32944 co-relation queries the response was YES. [2024-06-28 04:31:52,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12583 conditions, 2556 events. 1679/2556 cut-off events. For 32944/32944 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12679 event pairs, 655 based on Foata normal form. 2/2556 useless extension candidates. Maximal degree in co-relation 12549. Up to 2467 conditions per place. [2024-06-28 04:31:52,750 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 92 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2024-06-28 04:31:52,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 113 transitions, 905 flow [2024-06-28 04:31:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 04:31:52,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 04:31:52,751 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 573 flow. Second operand 7 states and 124 transitions. [2024-06-28 04:31:52,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 113 transitions, 905 flow [2024-06-28 04:31:52,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 866 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:52,774 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 650 flow [2024-06-28 04:31:52,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=650, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-28 04:31:52,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-28 04:31:52,775 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 650 flow [2024-06-28 04:31:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:52,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:52,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:31:52,776 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:52,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash -764583486, now seen corresponding path program 2 times [2024-06-28 04:31:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:52,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933448110] [2024-06-28 04:31:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:53,311 INFO 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 04:31:53,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933448110] [2024-06-28 04:31:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933448110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:53,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803519809] [2024-06-28 04:31:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:53,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:53,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:53,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:53,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:53,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:53,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:53,728 INFO L124 PetriNetUnfolderBase]: 1689/2574 cut-off events. [2024-06-28 04:31:53,729 INFO L125 PetriNetUnfolderBase]: For 36340/36340 co-relation queries the response was YES. [2024-06-28 04:31:53,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12965 conditions, 2574 events. 1689/2574 cut-off events. For 36340/36340 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12736 event pairs, 652 based on Foata normal form. 2/2574 useless extension candidates. Maximal degree in co-relation 12928. Up to 2475 conditions per place. [2024-06-28 04:31:53,743 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 90 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-28 04:31:53,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 948 flow [2024-06-28 04:31:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 04:31:53,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 04:31:53,744 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 650 flow. Second operand 6 states and 107 transitions. [2024-06-28 04:31:53,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 948 flow [2024-06-28 04:31:53,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 910 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:53,764 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 698 flow [2024-06-28 04:31:53,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2024-06-28 04:31:53,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-28 04:31:53,765 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 698 flow [2024-06-28 04:31:53,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:53,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:53,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:53,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:31:53,765 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:53,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash -751251006, now seen corresponding path program 3 times [2024-06-28 04:31:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:53,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089831005] [2024-06-28 04:31:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:53,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:54,273 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 04:31:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089831005] [2024-06-28 04:31:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089831005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:54,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:54,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:31:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755393565] [2024-06-28 04:31:54,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:54,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:31:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:54,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:31:54,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:31:54,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:54,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:54,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:54,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:54,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:54,665 INFO L124 PetriNetUnfolderBase]: 1673/2549 cut-off events. [2024-06-28 04:31:54,666 INFO L125 PetriNetUnfolderBase]: For 39309/39309 co-relation queries the response was YES. [2024-06-28 04:31:54,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12998 conditions, 2549 events. 1673/2549 cut-off events. For 39309/39309 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12571 event pairs, 656 based on Foata normal form. 4/2547 useless extension candidates. Maximal degree in co-relation 12960. Up to 2419 conditions per place. [2024-06-28 04:31:54,681 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 79 selfloop transitions, 24 changer transitions 0/108 dead transitions. [2024-06-28 04:31:54,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 108 transitions, 942 flow [2024-06-28 04:31:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 04:31:54,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 04:31:54,683 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 698 flow. Second operand 6 states and 106 transitions. [2024-06-28 04:31:54,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 108 transitions, 942 flow [2024-06-28 04:31:54,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 108 transitions, 884 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 04:31:54,734 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 696 flow [2024-06-28 04:31:54,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=696, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2024-06-28 04:31:54,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-28 04:31:54,735 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 696 flow [2024-06-28 04:31:54,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:54,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:54,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:54,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:31:54,736 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:54,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash -757910302, now seen corresponding path program 1 times [2024-06-28 04:31:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:54,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582544139] [2024-06-28 04:31:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:54,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:55,263 INFO 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 04:31:55,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:55,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582544139] [2024-06-28 04:31:55,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582544139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:55,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:55,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:31:55,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300719609] [2024-06-28 04:31:55,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:55,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:31:55,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:31:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:31:55,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:55,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 696 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:55,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:55,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:55,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:55,676 INFO L124 PetriNetUnfolderBase]: 1683/2569 cut-off events. [2024-06-28 04:31:55,676 INFO L125 PetriNetUnfolderBase]: For 38441/38444 co-relation queries the response was YES. [2024-06-28 04:31:55,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13049 conditions, 2569 events. 1683/2569 cut-off events. For 38441/38444 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12737 event pairs, 636 based on Foata normal form. 4/2570 useless extension candidates. Maximal degree in co-relation 13010. Up to 2475 conditions per place. [2024-06-28 04:31:55,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2024-06-28 04:31:55,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 1010 flow [2024-06-28 04:31:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 04:31:55,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 04:31:55,692 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 696 flow. Second operand 7 states and 115 transitions. [2024-06-28 04:31:55,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 1010 flow [2024-06-28 04:31:55,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 942 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 04:31:55,717 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 739 flow [2024-06-28 04:31:55,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=739, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-28 04:31:55,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-28 04:31:55,717 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 739 flow [2024-06-28 04:31:55,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:55,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:55,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:55,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:31:55,718 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 04:31:55,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash -751244062, now seen corresponding path program 2 times [2024-06-28 04:31:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:55,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943647161] [2024-06-28 04:31:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:56,208 INFO 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 04:31:56,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943647161] [2024-06-28 04:31:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943647161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:56,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:31:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136080252] [2024-06-28 04:31:56,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:56,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:31:56,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:31:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:31:56,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:56,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 739 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:56,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:56,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:56,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:56,630 INFO L124 PetriNetUnfolderBase]: 1685/2578 cut-off events. [2024-06-28 04:31:56,630 INFO L125 PetriNetUnfolderBase]: For 42570/42573 co-relation queries the response was YES. [2024-06-28 04:31:56,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13615 conditions, 2578 events. 1685/2578 cut-off events. For 42570/42573 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12790 event pairs, 634 based on Foata normal form. 4/2578 useless extension candidates. Maximal degree in co-relation 13573. Up to 2465 conditions per place. [2024-06-28 04:31:56,645 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 95 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-28 04:31:56,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 122 transitions, 1115 flow [2024-06-28 04:31:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:31:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:31:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 04:31:56,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 04:31:56,647 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 739 flow. Second operand 6 states and 106 transitions. [2024-06-28 04:31:56,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 122 transitions, 1115 flow [2024-06-28 04:31:56,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 122 transitions, 1076 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:56,680 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 828 flow [2024-06-28 04:31:56,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=828, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-06-28 04:31:56,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 04:31:56,681 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 828 flow [2024-06-28 04:31:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:56,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:56,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:56,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:31:56,682 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:31:56,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -751235134, now seen corresponding path program 1 times [2024-06-28 04:31:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053144381] [2024-06-28 04:31:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:31:57,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:57,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053144381] [2024-06-28 04:31:57,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053144381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:57,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:57,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:57,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59528221] [2024-06-28 04:31:57,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:57,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:57,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:57,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:57,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 828 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:57,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:57,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:57,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:57,887 INFO L124 PetriNetUnfolderBase]: 1731/2648 cut-off events. [2024-06-28 04:31:57,888 INFO L125 PetriNetUnfolderBase]: For 47982/47985 co-relation queries the response was YES. [2024-06-28 04:31:57,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14370 conditions, 2648 events. 1731/2648 cut-off events. For 47982/47985 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13187 event pairs, 618 based on Foata normal form. 8/2647 useless extension candidates. Maximal degree in co-relation 14326. Up to 2332 conditions per place. [2024-06-28 04:31:57,900 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 101 selfloop transitions, 42 changer transitions 0/148 dead transitions. [2024-06-28 04:31:57,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 148 transitions, 1429 flow [2024-06-28 04:31:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:31:57,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:31:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 04:31:57,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 04:31:57,902 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 828 flow. Second operand 7 states and 128 transitions. [2024-06-28 04:31:57,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 148 transitions, 1429 flow [2024-06-28 04:31:57,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 148 transitions, 1384 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:57,936 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1102 flow [2024-06-28 04:31:57,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1102, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-28 04:31:57,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-28 04:31:57,936 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1102 flow [2024-06-28 04:31:57,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:57,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:57,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:57,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:31:57,937 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 04:31:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash -976300624, now seen corresponding path program 1 times [2024-06-28 04:31:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:57,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951062318] [2024-06-28 04:31:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:31:58,656 INFO 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 04:31:58,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:31:58,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951062318] [2024-06-28 04:31:58,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951062318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:31:58,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:31:58,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:31:58,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045630205] [2024-06-28 04:31:58,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:31:58,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:31:58,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:31:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:31:58,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:31:58,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:31:58,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1102 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:58,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:31:58,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:31:58,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:31:59,402 INFO L124 PetriNetUnfolderBase]: 1815/2777 cut-off events. [2024-06-28 04:31:59,402 INFO L125 PetriNetUnfolderBase]: For 56846/56846 co-relation queries the response was YES. [2024-06-28 04:31:59,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16291 conditions, 2777 events. 1815/2777 cut-off events. For 56846/56846 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13893 event pairs, 457 based on Foata normal form. 8/2783 useless extension candidates. Maximal degree in co-relation 16243. Up to 2502 conditions per place. [2024-06-28 04:31:59,421 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 24 changer transitions 0/171 dead transitions. [2024-06-28 04:31:59,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 171 transitions, 1696 flow [2024-06-28 04:31:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:31:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:31:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 04:31:59,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-28 04:31:59,422 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1102 flow. Second operand 9 states and 167 transitions. [2024-06-28 04:31:59,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 171 transitions, 1696 flow [2024-06-28 04:31:59,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 171 transitions, 1617 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-28 04:31:59,467 INFO L231 Difference]: Finished difference. Result has 112 places, 133 transitions, 1158 flow [2024-06-28 04:31:59,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1158, PETRI_PLACES=112, PETRI_TRANSITIONS=133} [2024-06-28 04:31:59,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-28 04:31:59,468 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 133 transitions, 1158 flow [2024-06-28 04:31:59,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:31:59,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:31:59,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:31:59,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:31:59,468 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 04:31:59,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:31:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1461410652, now seen corresponding path program 2 times [2024-06-28 04:31:59,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:31:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828286965] [2024-06-28 04:31:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:31:59,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:31:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:00,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:00,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828286965] [2024-06-28 04:32:00,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828286965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:00,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:00,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409509922] [2024-06-28 04:32:00,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:00,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:00,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:00,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:00,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:00,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:00,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 133 transitions, 1158 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:00,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:00,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:00,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:00,842 INFO L124 PetriNetUnfolderBase]: 1799/2751 cut-off events. [2024-06-28 04:32:00,842 INFO L125 PetriNetUnfolderBase]: For 59107/59107 co-relation queries the response was YES. [2024-06-28 04:32:00,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 2751 events. 1799/2751 cut-off events. For 59107/59107 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13687 event pairs, 594 based on Foata normal form. 8/2757 useless extension candidates. Maximal degree in co-relation 16236. Up to 2570 conditions per place. [2024-06-28 04:32:00,871 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 20 changer transitions 0/163 dead transitions. [2024-06-28 04:32:00,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 163 transitions, 1568 flow [2024-06-28 04:32:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:32:00,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:32:00,873 INFO L175 Difference]: Start difference. First operand has 112 places, 133 transitions, 1158 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:32:00,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 163 transitions, 1568 flow [2024-06-28 04:32:00,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 1478 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:00,923 INFO L231 Difference]: Finished difference. Result has 115 places, 133 transitions, 1115 flow [2024-06-28 04:32:00,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1115, PETRI_PLACES=115, PETRI_TRANSITIONS=133} [2024-06-28 04:32:00,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-28 04:32:00,924 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 133 transitions, 1115 flow [2024-06-28 04:32:00,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:00,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:00,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:32:00,924 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 04:32:00,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash 495228014, now seen corresponding path program 1 times [2024-06-28 04:32:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:00,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271034251] [2024-06-28 04:32:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:01,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:01,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271034251] [2024-06-28 04:32:01,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271034251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:01,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:01,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:01,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41721978] [2024-06-28 04:32:01,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:01,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:01,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:01,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:01,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:01,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 133 transitions, 1115 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:01,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:01,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:02,667 INFO L124 PetriNetUnfolderBase]: 1821/2783 cut-off events. [2024-06-28 04:32:02,668 INFO L125 PetriNetUnfolderBase]: For 62787/62787 co-relation queries the response was YES. [2024-06-28 04:32:02,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16453 conditions, 2783 events. 1821/2783 cut-off events. For 62787/62787 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13908 event pairs, 597 based on Foata normal form. 4/2785 useless extension candidates. Maximal degree in co-relation 16401. Up to 2630 conditions per place. [2024-06-28 04:32:02,684 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 139 selfloop transitions, 21 changer transitions 0/165 dead transitions. [2024-06-28 04:32:02,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 165 transitions, 1565 flow [2024-06-28 04:32:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:32:02,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:32:02,686 INFO L175 Difference]: Start difference. First operand has 115 places, 133 transitions, 1115 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:32:02,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 165 transitions, 1565 flow [2024-06-28 04:32:02,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 165 transitions, 1520 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:02,741 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 1166 flow [2024-06-28 04:32:02,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1166, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2024-06-28 04:32:02,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-28 04:32:02,742 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 1166 flow [2024-06-28 04:32:02,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:02,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:02,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:02,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:32:02,743 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 04:32:02,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:02,743 INFO L85 PathProgramCache]: Analyzing trace with hash 776153358, now seen corresponding path program 3 times [2024-06-28 04:32:02,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:02,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028733261] [2024-06-28 04:32:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:02,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:03,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:03,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028733261] [2024-06-28 04:32:03,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028733261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:03,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:03,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:03,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288035961] [2024-06-28 04:32:03,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:03,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:03,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:03,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:03,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:03,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 1166 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:03,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:03,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:03,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:04,244 INFO L124 PetriNetUnfolderBase]: 1855/2844 cut-off events. [2024-06-28 04:32:04,245 INFO L125 PetriNetUnfolderBase]: For 69331/69334 co-relation queries the response was YES. [2024-06-28 04:32:04,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 2844 events. 1855/2844 cut-off events. For 69331/69334 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14246 event pairs, 533 based on Foata normal form. 10/2850 useless extension candidates. Maximal degree in co-relation 17208. Up to 2546 conditions per place. [2024-06-28 04:32:04,264 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 33 changer transitions 0/168 dead transitions. [2024-06-28 04:32:04,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1632 flow [2024-06-28 04:32:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 04:32:04,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 04:32:04,266 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 1166 flow. Second operand 8 states and 151 transitions. [2024-06-28 04:32:04,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1632 flow [2024-06-28 04:32:04,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1560 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:04,330 INFO L231 Difference]: Finished difference. Result has 118 places, 138 transitions, 1215 flow [2024-06-28 04:32:04,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=118, PETRI_TRANSITIONS=138} [2024-06-28 04:32:04,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-28 04:32:04,331 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 138 transitions, 1215 flow [2024-06-28 04:32:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:04,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:04,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:04,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:32:04,331 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 04:32:04,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2003863392, now seen corresponding path program 2 times [2024-06-28 04:32:04,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:04,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500379962] [2024-06-28 04:32:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:05,303 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 04:32:05,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500379962] [2024-06-28 04:32:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500379962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:05,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:05,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:05,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793074897] [2024-06-28 04:32:05,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:05,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:05,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:05,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:05,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:05,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 138 transitions, 1215 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:05,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:05,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:05,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:06,098 INFO L124 PetriNetUnfolderBase]: 1909/2947 cut-off events. [2024-06-28 04:32:06,099 INFO L125 PetriNetUnfolderBase]: For 76511/76514 co-relation queries the response was YES. [2024-06-28 04:32:06,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18159 conditions, 2947 events. 1909/2947 cut-off events. For 76511/76514 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15030 event pairs, 489 based on Foata normal form. 4/2947 useless extension candidates. Maximal degree in co-relation 18105. Up to 2484 conditions per place. [2024-06-28 04:32:06,118 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 48 changer transitions 0/184 dead transitions. [2024-06-28 04:32:06,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 184 transitions, 1997 flow [2024-06-28 04:32:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 04:32:06,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-28 04:32:06,119 INFO L175 Difference]: Start difference. First operand has 118 places, 138 transitions, 1215 flow. Second operand 8 states and 163 transitions. [2024-06-28 04:32:06,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 184 transitions, 1997 flow [2024-06-28 04:32:06,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 184 transitions, 1894 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:06,208 INFO L231 Difference]: Finished difference. Result has 120 places, 147 transitions, 1366 flow [2024-06-28 04:32:06,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=120, PETRI_TRANSITIONS=147} [2024-06-28 04:32:06,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-28 04:32:06,209 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 147 transitions, 1366 flow [2024-06-28 04:32:06,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:06,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:06,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:06,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:32:06,210 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 04:32:06,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:06,210 INFO L85 PathProgramCache]: Analyzing trace with hash 782824558, now seen corresponding path program 3 times [2024-06-28 04:32:06,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:06,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112134253] [2024-06-28 04:32:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:06,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:07,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:07,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112134253] [2024-06-28 04:32:07,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112134253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:07,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:07,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:07,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520517331] [2024-06-28 04:32:07,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:07,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:07,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:07,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:07,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 147 transitions, 1366 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:07,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:07,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:07,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:08,219 INFO L124 PetriNetUnfolderBase]: 2082/3213 cut-off events. [2024-06-28 04:32:08,220 INFO L125 PetriNetUnfolderBase]: For 82937/82940 co-relation queries the response was YES. [2024-06-28 04:32:08,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19900 conditions, 3213 events. 2082/3213 cut-off events. For 82937/82940 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16666 event pairs, 500 based on Foata normal form. 4/3207 useless extension candidates. Maximal degree in co-relation 19845. Up to 2592 conditions per place. [2024-06-28 04:32:08,240 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 135 selfloop transitions, 71 changer transitions 0/211 dead transitions. [2024-06-28 04:32:08,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 211 transitions, 2370 flow [2024-06-28 04:32:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 04:32:08,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 04:32:08,242 INFO L175 Difference]: Start difference. First operand has 120 places, 147 transitions, 1366 flow. Second operand 9 states and 172 transitions. [2024-06-28 04:32:08,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 211 transitions, 2370 flow [2024-06-28 04:32:08,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2228 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-28 04:32:08,310 INFO L231 Difference]: Finished difference. Result has 130 places, 174 transitions, 1724 flow [2024-06-28 04:32:08,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1724, PETRI_PLACES=130, PETRI_TRANSITIONS=174} [2024-06-28 04:32:08,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-28 04:32:08,311 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 174 transitions, 1724 flow [2024-06-28 04:32:08,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:08,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:08,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:32:08,311 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 04:32:08,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 782833486, now seen corresponding path program 1 times [2024-06-28 04:32:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651594323] [2024-06-28 04:32:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:08,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:09,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:09,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651594323] [2024-06-28 04:32:09,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651594323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:09,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:09,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:32:09,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150649029] [2024-06-28 04:32:09,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:09,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:32:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:09,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:32:09,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:32:09,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:09,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 174 transitions, 1724 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:09,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:09,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:09,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:10,400 INFO L124 PetriNetUnfolderBase]: 2099/3243 cut-off events. [2024-06-28 04:32:10,400 INFO L125 PetriNetUnfolderBase]: For 89294/89297 co-relation queries the response was YES. [2024-06-28 04:32:10,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20569 conditions, 3243 events. 2099/3243 cut-off events. For 89294/89297 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16751 event pairs, 527 based on Foata normal form. 4/3243 useless extension candidates. Maximal degree in co-relation 20508. Up to 2898 conditions per place. [2024-06-28 04:32:10,421 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 160 selfloop transitions, 41 changer transitions 0/206 dead transitions. [2024-06-28 04:32:10,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 206 transitions, 2252 flow [2024-06-28 04:32:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 04:32:10,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:32:10,423 INFO L175 Difference]: Start difference. First operand has 130 places, 174 transitions, 1724 flow. Second operand 8 states and 152 transitions. [2024-06-28 04:32:10,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 206 transitions, 2252 flow [2024-06-28 04:32:10,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 206 transitions, 2132 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 04:32:10,517 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1736 flow [2024-06-28 04:32:10,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1736, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-28 04:32:10,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-28 04:32:10,518 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1736 flow [2024-06-28 04:32:10,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:10,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:10,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:10,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:32:10,518 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 04:32:10,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash 341617520, now seen corresponding path program 4 times [2024-06-28 04:32:10,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:10,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389148523] [2024-06-28 04:32:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:10,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:11,195 INFO 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 04:32:11,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:11,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389148523] [2024-06-28 04:32:11,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389148523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:11,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:11,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:11,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747299951] [2024-06-28 04:32:11,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:11,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:11,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:11,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1736 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:11,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:11,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:11,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:12,033 INFO L124 PetriNetUnfolderBase]: 2083/3208 cut-off events. [2024-06-28 04:32:12,034 INFO L125 PetriNetUnfolderBase]: For 93707/93707 co-relation queries the response was YES. [2024-06-28 04:32:12,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20385 conditions, 3208 events. 2083/3208 cut-off events. For 93707/93707 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16553 event pairs, 532 based on Foata normal form. 8/3204 useless extension candidates. Maximal degree in co-relation 20322. Up to 2812 conditions per place. [2024-06-28 04:32:12,060 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 46 changer transitions 0/205 dead transitions. [2024-06-28 04:32:12,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 205 transitions, 2272 flow [2024-06-28 04:32:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:32:12,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:32:12,062 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1736 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:32:12,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 205 transitions, 2272 flow [2024-06-28 04:32:12,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 205 transitions, 2160 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:12,181 INFO L231 Difference]: Finished difference. Result has 137 places, 178 transitions, 1779 flow [2024-06-28 04:32:12,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1779, PETRI_PLACES=137, PETRI_TRANSITIONS=178} [2024-06-28 04:32:12,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-28 04:32:12,182 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 178 transitions, 1779 flow [2024-06-28 04:32:12,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:12,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:12,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:12,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:32:12,182 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:12,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash 492848898, now seen corresponding path program 4 times [2024-06-28 04:32:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:12,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090734676] [2024-06-28 04:32:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:13,112 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 04:32:13,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:13,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090734676] [2024-06-28 04:32:13,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090734676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:13,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:13,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:13,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876184123] [2024-06-28 04:32:13,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:13,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:13,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:13,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:13,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:13,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:13,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 178 transitions, 1779 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 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: 9 of 42 [2024-06-28 04:32:13,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:13,845 INFO L124 PetriNetUnfolderBase]: 2105/3240 cut-off events. [2024-06-28 04:32:13,845 INFO L125 PetriNetUnfolderBase]: For 99462/99462 co-relation queries the response was YES. [2024-06-28 04:32:13,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20857 conditions, 3240 events. 2105/3240 cut-off events. For 99462/99462 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16728 event pairs, 438 based on Foata normal form. 4/3232 useless extension candidates. Maximal degree in co-relation 20793. Up to 2614 conditions per place. [2024-06-28 04:32:13,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 127 selfloop transitions, 77 changer transitions 0/209 dead transitions. [2024-06-28 04:32:13,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 209 transitions, 2426 flow [2024-06-28 04:32:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 04:32:13,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 04:32:13,871 INFO L175 Difference]: Start difference. First operand has 137 places, 178 transitions, 1779 flow. Second operand 8 states and 151 transitions. [2024-06-28 04:32:13,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 209 transitions, 2426 flow [2024-06-28 04:32:13,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 209 transitions, 2289 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:13,979 INFO L231 Difference]: Finished difference. Result has 139 places, 181 transitions, 1861 flow [2024-06-28 04:32:13,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1861, PETRI_PLACES=139, PETRI_TRANSITIONS=181} [2024-06-28 04:32:13,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-28 04:32:13,980 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 181 transitions, 1861 flow [2024-06-28 04:32:13,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:13,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:13,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 04:32:13,981 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 04:32:13,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 259608756, now seen corresponding path program 5 times [2024-06-28 04:32:13,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:13,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534340134] [2024-06-28 04:32:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:14,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:14,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534340134] [2024-06-28 04:32:14,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534340134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:14,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:14,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671613985] [2024-06-28 04:32:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:15,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:15,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 181 transitions, 1861 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:15,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:15,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:15,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:15,746 INFO L124 PetriNetUnfolderBase]: 2127/3282 cut-off events. [2024-06-28 04:32:15,746 INFO L125 PetriNetUnfolderBase]: For 105317/105317 co-relation queries the response was YES. [2024-06-28 04:32:15,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21329 conditions, 3282 events. 2127/3282 cut-off events. For 105317/105317 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17041 event pairs, 436 based on Foata normal form. 4/3274 useless extension candidates. Maximal degree in co-relation 21264. Up to 2633 conditions per place. [2024-06-28 04:32:15,771 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 76 changer transitions 0/217 dead transitions. [2024-06-28 04:32:15,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 217 transitions, 2654 flow [2024-06-28 04:32:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 04:32:15,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-28 04:32:15,773 INFO L175 Difference]: Start difference. First operand has 139 places, 181 transitions, 1861 flow. Second operand 8 states and 157 transitions. [2024-06-28 04:32:15,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 217 transitions, 2654 flow [2024-06-28 04:32:15,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 217 transitions, 2474 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:15,882 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1904 flow [2024-06-28 04:32:15,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1904, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-28 04:32:15,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-28 04:32:15,883 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1904 flow [2024-06-28 04:32:15,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:15,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:15,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:15,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 04:32:15,884 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 04:32:15,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 259845906, now seen corresponding path program 6 times [2024-06-28 04:32:15,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:15,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029594840] [2024-06-28 04:32:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:15,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:16,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029594840] [2024-06-28 04:32:16,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029594840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:16,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:16,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:16,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124064096] [2024-06-28 04:32:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:16,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:16,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:16,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1904 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:16,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:16,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:16,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:17,506 INFO L124 PetriNetUnfolderBase]: 2117/3268 cut-off events. [2024-06-28 04:32:17,506 INFO L125 PetriNetUnfolderBase]: For 109121/109121 co-relation queries the response was YES. [2024-06-28 04:32:17,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21182 conditions, 3268 events. 2117/3268 cut-off events. For 109121/109121 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16967 event pairs, 436 based on Foata normal form. 4/3260 useless extension candidates. Maximal degree in co-relation 21116. Up to 2625 conditions per place. [2024-06-28 04:32:17,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 75 changer transitions 0/214 dead transitions. [2024-06-28 04:32:17,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 214 transitions, 2518 flow [2024-06-28 04:32:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 04:32:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 04:32:17,532 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1904 flow. Second operand 8 states and 155 transitions. [2024-06-28 04:32:17,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 214 transitions, 2518 flow [2024-06-28 04:32:17,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 214 transitions, 2318 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:17,665 INFO L231 Difference]: Finished difference. Result has 145 places, 184 transitions, 1862 flow [2024-06-28 04:32:17,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1862, PETRI_PLACES=145, PETRI_TRANSITIONS=184} [2024-06-28 04:32:17,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-28 04:32:17,666 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 184 transitions, 1862 flow [2024-06-28 04:32:17,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:17,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:17,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:17,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 04:32:17,666 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 04:32:17,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:17,667 INFO L85 PathProgramCache]: Analyzing trace with hash -514645010, now seen corresponding path program 2 times [2024-06-28 04:32:17,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:17,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389426958] [2024-06-28 04:32:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:17,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:18,797 INFO 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 04:32:18,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:18,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389426958] [2024-06-28 04:32:18,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389426958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:18,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:18,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:32:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633300316] [2024-06-28 04:32:18,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:18,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:32:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:32:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:32:18,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:18,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 1862 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:18,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:18,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:19,621 INFO L124 PetriNetUnfolderBase]: 2134/3311 cut-off events. [2024-06-28 04:32:19,621 INFO L125 PetriNetUnfolderBase]: For 115093/115093 co-relation queries the response was YES. [2024-06-28 04:32:19,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21431 conditions, 3311 events. 2134/3311 cut-off events. For 115093/115093 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17239 event pairs, 512 based on Foata normal form. 4/3308 useless extension candidates. Maximal degree in co-relation 21364. Up to 2956 conditions per place. [2024-06-28 04:32:19,649 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 40 changer transitions 0/212 dead transitions. [2024-06-28 04:32:19,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 212 transitions, 2396 flow [2024-06-28 04:32:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:32:19,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:32:19,651 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 1862 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:32:19,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 212 transitions, 2396 flow [2024-06-28 04:32:19,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 212 transitions, 2238 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:19,782 INFO L231 Difference]: Finished difference. Result has 146 places, 186 transitions, 1839 flow [2024-06-28 04:32:19,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1839, PETRI_PLACES=146, PETRI_TRANSITIONS=186} [2024-06-28 04:32:19,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-28 04:32:19,783 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 186 transitions, 1839 flow [2024-06-28 04:32:19,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:19,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:19,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:19,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 04:32:19,784 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 04:32:19,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash 259854834, now seen corresponding path program 3 times [2024-06-28 04:32:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:19,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773144015] [2024-06-28 04:32:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:21,077 INFO 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 04:32:21,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773144015] [2024-06-28 04:32:21,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773144015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:21,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:21,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:21,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712995269] [2024-06-28 04:32:21,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:21,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:21,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:21,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:21,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 186 transitions, 1839 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:21,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:21,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:21,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:21,860 INFO L124 PetriNetUnfolderBase]: 2151/3348 cut-off events. [2024-06-28 04:32:21,860 INFO L125 PetriNetUnfolderBase]: For 121867/121867 co-relation queries the response was YES. [2024-06-28 04:32:21,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21764 conditions, 3348 events. 2151/3348 cut-off events. For 121867/121867 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17584 event pairs, 517 based on Foata normal form. 4/3345 useless extension candidates. Maximal degree in co-relation 21696. Up to 2983 conditions per place. [2024-06-28 04:32:21,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 39 changer transitions 0/216 dead transitions. [2024-06-28 04:32:21,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 216 transitions, 2391 flow [2024-06-28 04:32:21,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 04:32:21,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:32:21,888 INFO L175 Difference]: Start difference. First operand has 146 places, 186 transitions, 1839 flow. Second operand 8 states and 148 transitions. [2024-06-28 04:32:21,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 216 transitions, 2391 flow [2024-06-28 04:32:22,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 216 transitions, 2274 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:22,012 INFO L231 Difference]: Finished difference. Result has 148 places, 188 transitions, 1859 flow [2024-06-28 04:32:22,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1859, PETRI_PLACES=148, PETRI_TRANSITIONS=188} [2024-06-28 04:32:22,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-28 04:32:22,012 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 188 transitions, 1859 flow [2024-06-28 04:32:22,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:22,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:22,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:22,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 04:32:22,013 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 04:32:22,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash -514288820, now seen corresponding path program 4 times [2024-06-28 04:32:22,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:22,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928510834] [2024-06-28 04:32:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:22,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:23,242 INFO 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 04:32:23,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:23,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928510834] [2024-06-28 04:32:23,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928510834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:23,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:23,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:32:23,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534258538] [2024-06-28 04:32:23,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:23,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:32:23,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:32:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:32:23,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:23,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 188 transitions, 1859 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:23,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:23,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:23,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:24,074 INFO L124 PetriNetUnfolderBase]: 2143/3336 cut-off events. [2024-06-28 04:32:24,074 INFO L125 PetriNetUnfolderBase]: For 126803/126803 co-relation queries the response was YES. [2024-06-28 04:32:24,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21805 conditions, 3336 events. 2143/3336 cut-off events. For 126803/126803 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17564 event pairs, 485 based on Foata normal form. 4/3333 useless extension candidates. Maximal degree in co-relation 21736. Up to 2889 conditions per place. [2024-06-28 04:32:24,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 164 selfloop transitions, 47 changer transitions 0/216 dead transitions. [2024-06-28 04:32:24,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 216 transitions, 2409 flow [2024-06-28 04:32:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:32:24,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:32:24,103 INFO L175 Difference]: Start difference. First operand has 148 places, 188 transitions, 1859 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:32:24,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 216 transitions, 2409 flow [2024-06-28 04:32:24,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 216 transitions, 2290 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:24,227 INFO L231 Difference]: Finished difference. Result has 150 places, 190 transitions, 1897 flow [2024-06-28 04:32:24,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1897, PETRI_PLACES=150, PETRI_TRANSITIONS=190} [2024-06-28 04:32:24,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-28 04:32:24,228 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 190 transitions, 1897 flow [2024-06-28 04:32:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:24,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:24,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:24,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 04:32:24,228 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 04:32:24,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1655697812, now seen corresponding path program 7 times [2024-06-28 04:32:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:24,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789612901] [2024-06-28 04:32:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:24,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789612901] [2024-06-28 04:32:25,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789612901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:25,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:25,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025079581] [2024-06-28 04:32:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:25,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:25,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:25,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 190 transitions, 1897 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:25,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:25,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:25,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:26,174 INFO L124 PetriNetUnfolderBase]: 2434/3777 cut-off events. [2024-06-28 04:32:26,174 INFO L125 PetriNetUnfolderBase]: For 133178/133181 co-relation queries the response was YES. [2024-06-28 04:32:26,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24122 conditions, 3777 events. 2434/3777 cut-off events. For 133178/133181 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20507 event pairs, 484 based on Foata normal form. 4/3777 useless extension candidates. Maximal degree in co-relation 24052. Up to 2871 conditions per place. [2024-06-28 04:32:26,203 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 154 selfloop transitions, 134 changer transitions 0/293 dead transitions. [2024-06-28 04:32:26,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 293 transitions, 3232 flow [2024-06-28 04:32:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:32:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:32:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 04:32:26,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-28 04:32:26,204 INFO L175 Difference]: Start difference. First operand has 150 places, 190 transitions, 1897 flow. Second operand 9 states and 178 transitions. [2024-06-28 04:32:26,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 293 transitions, 3232 flow [2024-06-28 04:32:26,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 293 transitions, 3023 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:26,425 INFO L231 Difference]: Finished difference. Result has 157 places, 246 transitions, 2657 flow [2024-06-28 04:32:26,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2657, PETRI_PLACES=157, PETRI_TRANSITIONS=246} [2024-06-28 04:32:26,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-28 04:32:26,425 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 246 transitions, 2657 flow [2024-06-28 04:32:26,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:26,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:26,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:26,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 04:32:26,426 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 04:32:26,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash 161239401, now seen corresponding path program 1 times [2024-06-28 04:32:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:26,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298613237] [2024-06-28 04:32:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:26,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:27,207 INFO 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 04:32:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298613237] [2024-06-28 04:32:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298613237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:27,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:27,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944893728] [2024-06-28 04:32:27,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:27,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:27,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:27,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:27,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 246 transitions, 2657 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:27,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:27,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:28,029 INFO L124 PetriNetUnfolderBase]: 2463/3822 cut-off events. [2024-06-28 04:32:28,030 INFO L125 PetriNetUnfolderBase]: For 138981/138981 co-relation queries the response was YES. [2024-06-28 04:32:28,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25398 conditions, 3822 events. 2463/3822 cut-off events. For 138981/138981 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20715 event pairs, 778 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 25323. Up to 3609 conditions per place. [2024-06-28 04:32:28,064 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 24 changer transitions 0/272 dead transitions. [2024-06-28 04:32:28,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 272 transitions, 3386 flow [2024-06-28 04:32:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 04:32:28,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 04:32:28,066 INFO L175 Difference]: Start difference. First operand has 157 places, 246 transitions, 2657 flow. Second operand 8 states and 130 transitions. [2024-06-28 04:32:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 272 transitions, 3386 flow [2024-06-28 04:32:28,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 272 transitions, 3147 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:28,272 INFO L231 Difference]: Finished difference. Result has 160 places, 258 transitions, 2647 flow [2024-06-28 04:32:28,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2647, PETRI_PLACES=160, PETRI_TRANSITIONS=258} [2024-06-28 04:32:28,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-28 04:32:28,273 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 258 transitions, 2647 flow [2024-06-28 04:32:28,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:28,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:28,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:28,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 04:32:28,273 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:28,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash 571109075, now seen corresponding path program 2 times [2024-06-28 04:32:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287665760] [2024-06-28 04:32:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:28,960 INFO 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 04:32:28,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:28,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287665760] [2024-06-28 04:32:28,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287665760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:28,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:28,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:28,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889359453] [2024-06-28 04:32:28,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:28,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:28,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:29,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:29,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 258 transitions, 2647 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:29,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:29,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:29,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:29,726 INFO L124 PetriNetUnfolderBase]: 2460/3808 cut-off events. [2024-06-28 04:32:29,727 INFO L125 PetriNetUnfolderBase]: For 143632/143632 co-relation queries the response was YES. [2024-06-28 04:32:29,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24997 conditions, 3808 events. 2460/3808 cut-off events. For 143632/143632 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20621 event pairs, 801 based on Foata normal form. 1/3807 useless extension candidates. Maximal degree in co-relation 24921. Up to 3596 conditions per place. [2024-06-28 04:32:29,755 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 236 selfloop transitions, 28 changer transitions 0/269 dead transitions. [2024-06-28 04:32:29,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 269 transitions, 3211 flow [2024-06-28 04:32:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:32:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:32:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 04:32:29,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:32:29,757 INFO L175 Difference]: Start difference. First operand has 160 places, 258 transitions, 2647 flow. Second operand 6 states and 105 transitions. [2024-06-28 04:32:29,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 269 transitions, 3211 flow [2024-06-28 04:32:29,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 269 transitions, 3134 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:29,934 INFO L231 Difference]: Finished difference. Result has 161 places, 258 transitions, 2644 flow [2024-06-28 04:32:29,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2644, PETRI_PLACES=161, PETRI_TRANSITIONS=258} [2024-06-28 04:32:29,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-28 04:32:29,935 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 258 transitions, 2644 flow [2024-06-28 04:32:29,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:29,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:29,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:29,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 04:32:29,936 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:29,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:29,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2020381106, now seen corresponding path program 1 times [2024-06-28 04:32:29,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:29,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482899106] [2024-06-28 04:32:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:29,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:30,428 INFO 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 04:32:30,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:30,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482899106] [2024-06-28 04:32:30,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482899106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:30,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:30,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:30,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578936362] [2024-06-28 04:32:30,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:30,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:30,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:30,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:30,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:30,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 258 transitions, 2644 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:30,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:30,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:30,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:31,096 INFO L124 PetriNetUnfolderBase]: 2516/3902 cut-off events. [2024-06-28 04:32:31,096 INFO L125 PetriNetUnfolderBase]: For 155057/155060 co-relation queries the response was YES. [2024-06-28 04:32:31,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25743 conditions, 3902 events. 2516/3902 cut-off events. For 155057/155060 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21163 event pairs, 644 based on Foata normal form. 6/3896 useless extension candidates. Maximal degree in co-relation 25667. Up to 3508 conditions per place. [2024-06-28 04:32:31,130 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 236 selfloop transitions, 52 changer transitions 0/293 dead transitions. [2024-06-28 04:32:31,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 293 transitions, 3557 flow [2024-06-28 04:32:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 04:32:31,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 04:32:31,132 INFO L175 Difference]: Start difference. First operand has 161 places, 258 transitions, 2644 flow. Second operand 7 states and 125 transitions. [2024-06-28 04:32:31,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 293 transitions, 3557 flow [2024-06-28 04:32:31,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 293 transitions, 3487 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:31,290 INFO L231 Difference]: Finished difference. Result has 165 places, 275 transitions, 2928 flow [2024-06-28 04:32:31,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2928, PETRI_PLACES=165, PETRI_TRANSITIONS=275} [2024-06-28 04:32:31,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-28 04:32:31,291 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 275 transitions, 2928 flow [2024-06-28 04:32:31,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:31,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:31,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:31,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 04:32:31,291 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:31,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1813727666, now seen corresponding path program 2 times [2024-06-28 04:32:31,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:31,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083344471] [2024-06-28 04:32:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:31,961 INFO 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 04:32:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083344471] [2024-06-28 04:32:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083344471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:31,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:31,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728328927] [2024-06-28 04:32:31,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:31,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:31,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:32,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:32,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 275 transitions, 2928 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:32,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:32,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:32,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:32,681 INFO L124 PetriNetUnfolderBase]: 2588/4020 cut-off events. [2024-06-28 04:32:32,682 INFO L125 PetriNetUnfolderBase]: For 161481/161484 co-relation queries the response was YES. [2024-06-28 04:32:32,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27160 conditions, 4020 events. 2588/4020 cut-off events. For 161481/161484 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21997 event pairs, 678 based on Foata normal form. 6/4009 useless extension candidates. Maximal degree in co-relation 27081. Up to 3347 conditions per place. [2024-06-28 04:32:32,717 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 78 changer transitions 0/315 dead transitions. [2024-06-28 04:32:32,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 315 transitions, 4065 flow [2024-06-28 04:32:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:32:32,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:32:32,719 INFO L175 Difference]: Start difference. First operand has 165 places, 275 transitions, 2928 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:32:32,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 315 transitions, 4065 flow [2024-06-28 04:32:32,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 315 transitions, 3995 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 04:32:32,920 INFO L231 Difference]: Finished difference. Result has 173 places, 298 transitions, 3385 flow [2024-06-28 04:32:32,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3385, PETRI_PLACES=173, PETRI_TRANSITIONS=298} [2024-06-28 04:32:32,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-28 04:32:32,921 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 298 transitions, 3385 flow [2024-06-28 04:32:32,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:32,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:32,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:32,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 04:32:32,921 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:32,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1813460756, now seen corresponding path program 3 times [2024-06-28 04:32:32,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:32,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443843386] [2024-06-28 04:32:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:32,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:33,467 INFO 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 04:32:33,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:33,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443843386] [2024-06-28 04:32:33,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443843386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:33,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:33,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:33,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531110818] [2024-06-28 04:32:33,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:33,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:33,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:33,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 298 transitions, 3385 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:33,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:33,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:33,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:34,238 INFO L124 PetriNetUnfolderBase]: 2578/3996 cut-off events. [2024-06-28 04:32:34,239 INFO L125 PetriNetUnfolderBase]: For 169902/169905 co-relation queries the response was YES. [2024-06-28 04:32:34,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27565 conditions, 3996 events. 2578/3996 cut-off events. For 169902/169905 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21789 event pairs, 679 based on Foata normal form. 10/3989 useless extension candidates. Maximal degree in co-relation 27482. Up to 3349 conditions per place. [2024-06-28 04:32:34,274 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 88 changer transitions 0/318 dead transitions. [2024-06-28 04:32:34,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 318 transitions, 4314 flow [2024-06-28 04:32:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 04:32:34,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-28 04:32:34,276 INFO L175 Difference]: Start difference. First operand has 173 places, 298 transitions, 3385 flow. Second operand 7 states and 130 transitions. [2024-06-28 04:32:34,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 318 transitions, 4314 flow [2024-06-28 04:32:34,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 318 transitions, 4238 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-28 04:32:34,484 INFO L231 Difference]: Finished difference. Result has 179 places, 303 transitions, 3594 flow [2024-06-28 04:32:34,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3594, PETRI_PLACES=179, PETRI_TRANSITIONS=303} [2024-06-28 04:32:34,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-28 04:32:34,484 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 303 transitions, 3594 flow [2024-06-28 04:32:34,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:34,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:34,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:34,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 04:32:34,485 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:34,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1813450836, now seen corresponding path program 1 times [2024-06-28 04:32:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:34,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466847234] [2024-06-28 04:32:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:35,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:35,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466847234] [2024-06-28 04:32:35,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466847234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:35,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:35,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:35,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112861187] [2024-06-28 04:32:35,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:35,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:35,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:35,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:35,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:35,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:35,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 303 transitions, 3594 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:35,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:35,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:35,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:36,264 INFO L124 PetriNetUnfolderBase]: 2622/4058 cut-off events. [2024-06-28 04:32:36,264 INFO L125 PetriNetUnfolderBase]: For 183952/183952 co-relation queries the response was YES. [2024-06-28 04:32:36,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28368 conditions, 4058 events. 2622/4058 cut-off events. For 183952/183952 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22076 event pairs, 711 based on Foata normal form. 15/4067 useless extension candidates. Maximal degree in co-relation 28282. Up to 3739 conditions per place. [2024-06-28 04:32:36,302 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 48 changer transitions 0/329 dead transitions. [2024-06-28 04:32:36,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 329 transitions, 4445 flow [2024-06-28 04:32:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:32:36,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:32:36,304 INFO L175 Difference]: Start difference. First operand has 179 places, 303 transitions, 3594 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:32:36,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 329 transitions, 4445 flow [2024-06-28 04:32:36,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 329 transitions, 4292 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 04:32:36,532 INFO L231 Difference]: Finished difference. Result has 185 places, 312 transitions, 3694 flow [2024-06-28 04:32:36,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3445, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3694, PETRI_PLACES=185, PETRI_TRANSITIONS=312} [2024-06-28 04:32:36,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-28 04:32:36,533 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 312 transitions, 3694 flow [2024-06-28 04:32:36,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:36,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:36,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 04:32:36,534 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 04:32:36,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash -915714501, now seen corresponding path program 1 times [2024-06-28 04:32:36,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:36,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497642541] [2024-06-28 04:32:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497642541] [2024-06-28 04:32:37,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497642541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:37,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:37,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216316176] [2024-06-28 04:32:37,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:37,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:37,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:37,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:37,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 312 transitions, 3694 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:37,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:37,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:37,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:37,941 INFO L124 PetriNetUnfolderBase]: 2619/4051 cut-off events. [2024-06-28 04:32:37,941 INFO L125 PetriNetUnfolderBase]: For 185758/185758 co-relation queries the response was YES. [2024-06-28 04:32:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28880 conditions, 4051 events. 2619/4051 cut-off events. For 185758/185758 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22053 event pairs, 703 based on Foata normal form. 1/4050 useless extension candidates. Maximal degree in co-relation 28792. Up to 3808 conditions per place. [2024-06-28 04:32:37,981 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 302 selfloop transitions, 28 changer transitions 0/335 dead transitions. [2024-06-28 04:32:37,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 335 transitions, 4476 flow [2024-06-28 04:32:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 04:32:37,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 04:32:37,982 INFO L175 Difference]: Start difference. First operand has 185 places, 312 transitions, 3694 flow. Second operand 7 states and 125 transitions. [2024-06-28 04:32:37,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 335 transitions, 4476 flow [2024-06-28 04:32:38,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 335 transitions, 4365 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:38,278 INFO L231 Difference]: Finished difference. Result has 188 places, 315 transitions, 3699 flow [2024-06-28 04:32:38,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3699, PETRI_PLACES=188, PETRI_TRANSITIONS=315} [2024-06-28 04:32:38,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-28 04:32:38,279 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 315 transitions, 3699 flow [2024-06-28 04:32:38,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:38,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:38,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 04:32:38,280 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 04:32:38,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash -331940735, now seen corresponding path program 1 times [2024-06-28 04:32:38,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:38,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794702618] [2024-06-28 04:32:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:38,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:38,710 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 04:32:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794702618] [2024-06-28 04:32:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794702618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:38,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959530206] [2024-06-28 04:32:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:38,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:38,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:38,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 315 transitions, 3699 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:38,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:38,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:38,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:39,489 INFO L124 PetriNetUnfolderBase]: 2629/4075 cut-off events. [2024-06-28 04:32:39,489 INFO L125 PetriNetUnfolderBase]: For 193734/193737 co-relation queries the response was YES. [2024-06-28 04:32:39,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29306 conditions, 4075 events. 2629/4075 cut-off events. For 193734/193737 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22287 event pairs, 677 based on Foata normal form. 4/4073 useless extension candidates. Maximal degree in co-relation 29216. Up to 3734 conditions per place. [2024-06-28 04:32:39,528 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 48 changer transitions 0/339 dead transitions. [2024-06-28 04:32:39,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 339 transitions, 4504 flow [2024-06-28 04:32:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:32:39,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 04:32:39,533 INFO L175 Difference]: Start difference. First operand has 188 places, 315 transitions, 3699 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:32:39,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 339 transitions, 4504 flow [2024-06-28 04:32:39,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 339 transitions, 4414 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:39,812 INFO L231 Difference]: Finished difference. Result has 191 places, 319 transitions, 3786 flow [2024-06-28 04:32:39,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3609, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3786, PETRI_PLACES=191, PETRI_TRANSITIONS=319} [2024-06-28 04:32:39,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-28 04:32:39,813 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 319 transitions, 3786 flow [2024-06-28 04:32:39,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:39,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:39,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:39,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 04:32:39,813 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:39,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:39,814 INFO L85 PathProgramCache]: Analyzing trace with hash -325274495, now seen corresponding path program 2 times [2024-06-28 04:32:39,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:39,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615774180] [2024-06-28 04:32:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:39,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:40,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:40,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615774180] [2024-06-28 04:32:40,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615774180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:40,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:40,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:40,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356358363] [2024-06-28 04:32:40,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:40,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:40,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:40,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:40,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:40,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:40,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 319 transitions, 3786 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:40,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:40,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:40,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:41,194 INFO L124 PetriNetUnfolderBase]: 2663/4134 cut-off events. [2024-06-28 04:32:41,194 INFO L125 PetriNetUnfolderBase]: For 205871/205874 co-relation queries the response was YES. [2024-06-28 04:32:41,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30140 conditions, 4134 events. 2663/4134 cut-off events. For 205871/205874 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22730 event pairs, 674 based on Foata normal form. 4/4132 useless extension candidates. Maximal degree in co-relation 30048. Up to 3740 conditions per place. [2024-06-28 04:32:41,232 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 284 selfloop transitions, 57 changer transitions 0/346 dead transitions. [2024-06-28 04:32:41,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 346 transitions, 4770 flow [2024-06-28 04:32:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 04:32:41,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 04:32:41,234 INFO L175 Difference]: Start difference. First operand has 191 places, 319 transitions, 3786 flow. Second operand 7 states and 127 transitions. [2024-06-28 04:32:41,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 346 transitions, 4770 flow [2024-06-28 04:32:41,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 346 transitions, 4705 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 04:32:41,529 INFO L231 Difference]: Finished difference. Result has 196 places, 328 transitions, 4036 flow [2024-06-28 04:32:41,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4036, PETRI_PLACES=196, PETRI_TRANSITIONS=328} [2024-06-28 04:32:41,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-28 04:32:41,530 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 328 transitions, 4036 flow [2024-06-28 04:32:41,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:41,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:41,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:41,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 04:32:41,531 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:41,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:41,531 INFO L85 PathProgramCache]: Analyzing trace with hash 63566721, now seen corresponding path program 3 times [2024-06-28 04:32:41,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:41,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770179094] [2024-06-28 04:32:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:41,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:41,963 INFO 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 04:32:41,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:41,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770179094] [2024-06-28 04:32:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770179094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:41,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:41,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593354589] [2024-06-28 04:32:41,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:41,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:41,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 328 transitions, 4036 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:41,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:41,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:41,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:42,829 INFO L124 PetriNetUnfolderBase]: 2657/4134 cut-off events. [2024-06-28 04:32:42,829 INFO L125 PetriNetUnfolderBase]: For 212892/212895 co-relation queries the response was YES. [2024-06-28 04:32:42,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30342 conditions, 4134 events. 2657/4134 cut-off events. For 212892/212895 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22803 event pairs, 666 based on Foata normal form. 4/4126 useless extension candidates. Maximal degree in co-relation 30248. Up to 3777 conditions per place. [2024-06-28 04:32:42,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 47 changer transitions 0/347 dead transitions. [2024-06-28 04:32:42,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 347 transitions, 4801 flow [2024-06-28 04:32:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:32:42,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 04:32:42,871 INFO L175 Difference]: Start difference. First operand has 196 places, 328 transitions, 4036 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:32:42,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 347 transitions, 4801 flow [2024-06-28 04:32:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 347 transitions, 4696 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 04:32:43,181 INFO L231 Difference]: Finished difference. Result has 199 places, 328 transitions, 4032 flow [2024-06-28 04:32:43,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3931, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4032, PETRI_PLACES=199, PETRI_TRANSITIONS=328} [2024-06-28 04:32:43,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 04:32:43,182 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 328 transitions, 4032 flow [2024-06-28 04:32:43,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:43,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:43,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:43,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 04:32:43,186 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:43,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:43,187 INFO L85 PathProgramCache]: Analyzing trace with hash 809717729, now seen corresponding path program 4 times [2024-06-28 04:32:43,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:43,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234692657] [2024-06-28 04:32:43,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:43,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:43,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:43,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234692657] [2024-06-28 04:32:43,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234692657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:43,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:43,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:43,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815947866] [2024-06-28 04:32:43,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:43,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:43,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:43,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:43,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 328 transitions, 4032 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:43,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:43,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:43,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:44,507 INFO L124 PetriNetUnfolderBase]: 2641/4111 cut-off events. [2024-06-28 04:32:44,508 INFO L125 PetriNetUnfolderBase]: For 218480/218483 co-relation queries the response was YES. [2024-06-28 04:32:44,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30198 conditions, 4111 events. 2641/4111 cut-off events. For 218480/218483 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22642 event pairs, 659 based on Foata normal form. 6/4104 useless extension candidates. Maximal degree in co-relation 30103. Up to 3683 conditions per place. [2024-06-28 04:32:44,550 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 58 changer transitions 0/345 dead transitions. [2024-06-28 04:32:44,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 345 transitions, 4783 flow [2024-06-28 04:32:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 04:32:44,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 04:32:44,552 INFO L175 Difference]: Start difference. First operand has 199 places, 328 transitions, 4032 flow. Second operand 7 states and 124 transitions. [2024-06-28 04:32:44,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 345 transitions, 4783 flow [2024-06-28 04:32:44,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 345 transitions, 4642 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:45,000 INFO L231 Difference]: Finished difference. Result has 199 places, 328 transitions, 4016 flow [2024-06-28 04:32:45,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4016, PETRI_PLACES=199, PETRI_TRANSITIONS=328} [2024-06-28 04:32:45,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-28 04:32:45,002 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 328 transitions, 4016 flow [2024-06-28 04:32:45,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:45,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:45,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:45,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 04:32:45,002 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:45,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -397663103, now seen corresponding path program 5 times [2024-06-28 04:32:45,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:45,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201538765] [2024-06-28 04:32:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:45,605 INFO 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 04:32:45,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:45,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201538765] [2024-06-28 04:32:45,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201538765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:45,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:45,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:45,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977524072] [2024-06-28 04:32:45,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:45,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:45,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:45,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 328 transitions, 4016 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:45,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:45,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:45,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:46,449 INFO L124 PetriNetUnfolderBase]: 2675/4151 cut-off events. [2024-06-28 04:32:46,449 INFO L125 PetriNetUnfolderBase]: For 229469/229472 co-relation queries the response was YES. [2024-06-28 04:32:46,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30633 conditions, 4151 events. 2675/4151 cut-off events. For 229469/229472 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22824 event pairs, 682 based on Foata normal form. 8/4142 useless extension candidates. Maximal degree in co-relation 30539. Up to 3455 conditions per place. [2024-06-28 04:32:46,491 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 240 selfloop transitions, 105 changer transitions 0/350 dead transitions. [2024-06-28 04:32:46,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 350 transitions, 5049 flow [2024-06-28 04:32:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:32:46,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 04:32:46,493 INFO L175 Difference]: Start difference. First operand has 199 places, 328 transitions, 4016 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:32:46,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 350 transitions, 5049 flow [2024-06-28 04:32:46,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 350 transitions, 4897 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:46,838 INFO L231 Difference]: Finished difference. Result has 201 places, 335 transitions, 4190 flow [2024-06-28 04:32:46,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4190, PETRI_PLACES=201, PETRI_TRANSITIONS=335} [2024-06-28 04:32:46,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 04:32:46,839 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 335 transitions, 4190 flow [2024-06-28 04:32:46,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:46,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:46,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:46,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 04:32:46,839 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:46,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:46,840 INFO L85 PathProgramCache]: Analyzing trace with hash -390996863, now seen corresponding path program 6 times [2024-06-28 04:32:46,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:46,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052745244] [2024-06-28 04:32:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:46,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:47,338 INFO 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 04:32:47,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:47,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052745244] [2024-06-28 04:32:47,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052745244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:47,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:47,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:47,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637425789] [2024-06-28 04:32:47,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:47,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:47,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:47,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:47,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:47,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 335 transitions, 4190 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:47,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:47,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:47,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:48,118 INFO L124 PetriNetUnfolderBase]: 2651/4124 cut-off events. [2024-06-28 04:32:48,118 INFO L125 PetriNetUnfolderBase]: For 231848/231851 co-relation queries the response was YES. [2024-06-28 04:32:48,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30495 conditions, 4124 events. 2651/4124 cut-off events. For 231848/231851 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22738 event pairs, 682 based on Foata normal form. 8/4115 useless extension candidates. Maximal degree in co-relation 30400. Up to 3439 conditions per place. [2024-06-28 04:32:48,163 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 97 changer transitions 0/349 dead transitions. [2024-06-28 04:32:48,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 349 transitions, 5024 flow [2024-06-28 04:32:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 04:32:48,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-28 04:32:48,164 INFO L175 Difference]: Start difference. First operand has 201 places, 335 transitions, 4190 flow. Second operand 7 states and 129 transitions. [2024-06-28 04:32:48,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 349 transitions, 5024 flow [2024-06-28 04:32:48,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 349 transitions, 4663 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-28 04:32:48,624 INFO L231 Difference]: Finished difference. Result has 201 places, 335 transitions, 4036 flow [2024-06-28 04:32:48,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4036, PETRI_PLACES=201, PETRI_TRANSITIONS=335} [2024-06-28 04:32:48,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 04:32:48,628 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 335 transitions, 4036 flow [2024-06-28 04:32:48,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:48,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:48,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:48,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 04:32:48,628 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 04:32:48,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:48,629 INFO L85 PathProgramCache]: Analyzing trace with hash -382907165, now seen corresponding path program 1 times [2024-06-28 04:32:48,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:48,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448460383] [2024-06-28 04:32:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:48,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:32:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:49,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448460383] [2024-06-28 04:32:49,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448460383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:49,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:49,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:49,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751364053] [2024-06-28 04:32:49,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:49,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:49,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:49,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 335 transitions, 4036 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:49,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:49,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:49,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:50,149 INFO L124 PetriNetUnfolderBase]: 2649/4115 cut-off events. [2024-06-28 04:32:50,149 INFO L125 PetriNetUnfolderBase]: For 232178/232178 co-relation queries the response was YES. [2024-06-28 04:32:50,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30384 conditions, 4115 events. 2649/4115 cut-off events. For 232178/232178 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22615 event pairs, 703 based on Foata normal form. 2/4111 useless extension candidates. Maximal degree in co-relation 30289. Up to 3824 conditions per place. [2024-06-28 04:32:50,192 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 47 changer transitions 0/353 dead transitions. [2024-06-28 04:32:50,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 353 transitions, 4875 flow [2024-06-28 04:32:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:32:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:32:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:32:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:32:50,203 INFO L175 Difference]: Start difference. First operand has 201 places, 335 transitions, 4036 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:32:50,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 353 transitions, 4875 flow [2024-06-28 04:32:50,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 353 transitions, 4641 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:50,678 INFO L231 Difference]: Finished difference. Result has 203 places, 340 transitions, 3997 flow [2024-06-28 04:32:50,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3997, PETRI_PLACES=203, PETRI_TRANSITIONS=340} [2024-06-28 04:32:50,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-28 04:32:50,679 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 340 transitions, 3997 flow [2024-06-28 04:32:50,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:50,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:50,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:50,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 04:32:50,680 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:50,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:50,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1787928417, now seen corresponding path program 1 times [2024-06-28 04:32:50,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:50,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807612963] [2024-06-28 04:32:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:50,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:51,495 INFO 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 04:32:51,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:51,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807612963] [2024-06-28 04:32:51,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807612963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:51,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:51,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:32:51,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998852110] [2024-06-28 04:32:51,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:51,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:32:51,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:32:51,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:32:51,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:51,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 340 transitions, 3997 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:51,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:51,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:51,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:52,370 INFO L124 PetriNetUnfolderBase]: 2659/4137 cut-off events. [2024-06-28 04:32:52,370 INFO L125 PetriNetUnfolderBase]: For 239818/239818 co-relation queries the response was YES. [2024-06-28 04:32:52,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30640 conditions, 4137 events. 2659/4137 cut-off events. For 239818/239818 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22831 event pairs, 894 based on Foata normal form. 2/4137 useless extension candidates. Maximal degree in co-relation 30544. Up to 3871 conditions per place. [2024-06-28 04:32:52,418 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 332 selfloop transitions, 22 changer transitions 0/359 dead transitions. [2024-06-28 04:32:52,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 359 transitions, 4805 flow [2024-06-28 04:32:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 04:32:52,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-28 04:32:52,419 INFO L175 Difference]: Start difference. First operand has 203 places, 340 transitions, 3997 flow. Second operand 7 states and 122 transitions. [2024-06-28 04:32:52,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 359 transitions, 4805 flow [2024-06-28 04:32:52,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 359 transitions, 4660 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 04:32:52,875 INFO L231 Difference]: Finished difference. Result has 204 places, 343 transitions, 3956 flow [2024-06-28 04:32:52,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3852, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3956, PETRI_PLACES=204, PETRI_TRANSITIONS=343} [2024-06-28 04:32:52,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-28 04:32:52,876 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 343 transitions, 3956 flow [2024-06-28 04:32:52,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:52,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:52,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:52,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 04:32:52,877 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:52,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:52,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1788048573, now seen corresponding path program 1 times [2024-06-28 04:32:52,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:52,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792306355] [2024-06-28 04:32:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:53,675 INFO 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 04:32:53,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:53,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792306355] [2024-06-28 04:32:53,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792306355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:53,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:53,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:32:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167994512] [2024-06-28 04:32:53,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:32:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:32:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:32:53,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:53,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 343 transitions, 3956 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:53,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:53,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:53,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:54,567 INFO L124 PetriNetUnfolderBase]: 2653/4136 cut-off events. [2024-06-28 04:32:54,567 INFO L125 PetriNetUnfolderBase]: For 244750/244750 co-relation queries the response was YES. [2024-06-28 04:32:54,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30815 conditions, 4136 events. 2653/4136 cut-off events. For 244750/244750 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22871 event pairs, 641 based on Foata normal form. 2/4131 useless extension candidates. Maximal degree in co-relation 30718. Up to 3659 conditions per place. [2024-06-28 04:32:54,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 285 selfloop transitions, 72 changer transitions 0/362 dead transitions. [2024-06-28 04:32:54,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 362 transitions, 4865 flow [2024-06-28 04:32:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 04:32:54,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-28 04:32:54,612 INFO L175 Difference]: Start difference. First operand has 204 places, 343 transitions, 3956 flow. Second operand 7 states and 125 transitions. [2024-06-28 04:32:54,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 362 transitions, 4865 flow [2024-06-28 04:32:54,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 362 transitions, 4765 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:54,963 INFO L231 Difference]: Finished difference. Result has 207 places, 346 transitions, 4101 flow [2024-06-28 04:32:54,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4101, PETRI_PLACES=207, PETRI_TRANSITIONS=346} [2024-06-28 04:32:54,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-28 04:32:54,964 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 346 transitions, 4101 flow [2024-06-28 04:32:54,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:54,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:54,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 04:32:54,965 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:54,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 524513731, now seen corresponding path program 2 times [2024-06-28 04:32:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640224911] [2024-06-28 04:32:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:55,881 INFO 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 04:32:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640224911] [2024-06-28 04:32:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640224911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:55,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:55,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:55,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418846928] [2024-06-28 04:32:55,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:55,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:55,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:55,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:55,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 346 transitions, 4101 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:55,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:55,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:55,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:56,826 INFO L124 PetriNetUnfolderBase]: 2663/4137 cut-off events. [2024-06-28 04:32:56,826 INFO L125 PetriNetUnfolderBase]: For 255933/255933 co-relation queries the response was YES. [2024-06-28 04:32:56,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31321 conditions, 4137 events. 2663/4137 cut-off events. For 255933/255933 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22752 event pairs, 883 based on Foata normal form. 2/4137 useless extension candidates. Maximal degree in co-relation 31222. Up to 3847 conditions per place. [2024-06-28 04:32:56,868 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 325 selfloop transitions, 35 changer transitions 0/365 dead transitions. [2024-06-28 04:32:56,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 365 transitions, 4927 flow [2024-06-28 04:32:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:56,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:32:56,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 04:32:56,870 INFO L175 Difference]: Start difference. First operand has 207 places, 346 transitions, 4101 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:32:56,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 365 transitions, 4927 flow [2024-06-28 04:32:57,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 365 transitions, 4784 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:57,337 INFO L231 Difference]: Finished difference. Result has 209 places, 349 transitions, 4097 flow [2024-06-28 04:32:57,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4097, PETRI_PLACES=209, PETRI_TRANSITIONS=349} [2024-06-28 04:32:57,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-28 04:32:57,338 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 349 transitions, 4097 flow [2024-06-28 04:32:57,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:57,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:57,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:57,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 04:32:57,339 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:32:57,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:57,339 INFO L85 PathProgramCache]: Analyzing trace with hash -390987935, now seen corresponding path program 3 times [2024-06-28 04:32:57,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:57,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230615869] [2024-06-28 04:32:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:57,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:32:58,237 INFO 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 04:32:58,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:32:58,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230615869] [2024-06-28 04:32:58,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230615869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:32:58,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:32:58,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:32:58,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791972760] [2024-06-28 04:32:58,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:32:58,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:32:58,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:32:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:32:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:32:58,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:32:58,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 349 transitions, 4097 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:58,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:32:58,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:32:58,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:32:59,148 INFO L124 PetriNetUnfolderBase]: 2657/4123 cut-off events. [2024-06-28 04:32:59,149 INFO L125 PetriNetUnfolderBase]: For 252734/252734 co-relation queries the response was YES. [2024-06-28 04:32:59,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31156 conditions, 4123 events. 2657/4123 cut-off events. For 252734/252734 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22697 event pairs, 896 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 31057. Up to 3824 conditions per place. [2024-06-28 04:32:59,193 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 39 changer transitions 0/366 dead transitions. [2024-06-28 04:32:59,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 366 transitions, 4921 flow [2024-06-28 04:32:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:32:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:32:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 04:32:59,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 04:32:59,195 INFO L175 Difference]: Start difference. First operand has 209 places, 349 transitions, 4097 flow. Second operand 7 states and 123 transitions. [2024-06-28 04:32:59,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 366 transitions, 4921 flow [2024-06-28 04:32:59,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 366 transitions, 4810 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 04:32:59,669 INFO L231 Difference]: Finished difference. Result has 211 places, 352 transitions, 4136 flow [2024-06-28 04:32:59,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4136, PETRI_PLACES=211, PETRI_TRANSITIONS=352} [2024-06-28 04:32:59,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-28 04:32:59,670 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 352 transitions, 4136 flow [2024-06-28 04:32:59,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:32:59,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:32:59,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:32:59,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 04:32:59,670 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 04:32:59,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:32:59,671 INFO L85 PathProgramCache]: Analyzing trace with hash -415345323, now seen corresponding path program 1 times [2024-06-28 04:32:59,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:32:59,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832347631] [2024-06-28 04:32:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:32:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:32:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:00,741 INFO 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 04:33:00,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:00,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832347631] [2024-06-28 04:33:00,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832347631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:00,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:00,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:00,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406959107] [2024-06-28 04:33:00,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:00,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:00,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:00,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:00,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 352 transitions, 4136 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:00,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:00,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:00,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:01,887 INFO L124 PetriNetUnfolderBase]: 2826/4426 cut-off events. [2024-06-28 04:33:01,888 INFO L125 PetriNetUnfolderBase]: For 295854/295854 co-relation queries the response was YES. [2024-06-28 04:33:01,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34159 conditions, 4426 events. 2826/4426 cut-off events. For 295854/295854 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24783 event pairs, 548 based on Foata normal form. 16/4435 useless extension candidates. Maximal degree in co-relation 34059. Up to 3048 conditions per place. [2024-06-28 04:33:01,932 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 143 changer transitions 0/403 dead transitions. [2024-06-28 04:33:01,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 403 transitions, 5392 flow [2024-06-28 04:33:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-28 04:33:01,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-28 04:33:01,934 INFO L175 Difference]: Start difference. First operand has 211 places, 352 transitions, 4136 flow. Second operand 9 states and 183 transitions. [2024-06-28 04:33:01,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 403 transitions, 5392 flow [2024-06-28 04:33:02,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 403 transitions, 5264 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:02,581 INFO L231 Difference]: Finished difference. Result has 215 places, 354 transitions, 4382 flow [2024-06-28 04:33:02,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4008, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4382, PETRI_PLACES=215, PETRI_TRANSITIONS=354} [2024-06-28 04:33:02,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-28 04:33:02,582 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 354 transitions, 4382 flow [2024-06-28 04:33:02,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:02,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:02,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:02,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 04:33:02,583 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 04:33:02,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 447255727, now seen corresponding path program 2 times [2024-06-28 04:33:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:02,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314335044] [2024-06-28 04:33:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:03,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:03,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314335044] [2024-06-28 04:33:03,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314335044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:03,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:03,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591017560] [2024-06-28 04:33:03,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:03,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:03,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:03,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:03,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 354 transitions, 4382 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:03,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:03,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:03,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:04,875 INFO L124 PetriNetUnfolderBase]: 2901/4527 cut-off events. [2024-06-28 04:33:04,875 INFO L125 PetriNetUnfolderBase]: For 316883/316883 co-relation queries the response was YES. [2024-06-28 04:33:04,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35754 conditions, 4527 events. 2901/4527 cut-off events. For 316883/316883 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25412 event pairs, 578 based on Foata normal form. 20/4540 useless extension candidates. Maximal degree in co-relation 35653. Up to 3427 conditions per place. [2024-06-28 04:33:04,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 251 selfloop transitions, 143 changer transitions 0/399 dead transitions. [2024-06-28 04:33:04,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 399 transitions, 5408 flow [2024-06-28 04:33:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 04:33:04,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-28 04:33:04,926 INFO L175 Difference]: Start difference. First operand has 215 places, 354 transitions, 4382 flow. Second operand 9 states and 178 transitions. [2024-06-28 04:33:04,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 399 transitions, 5408 flow [2024-06-28 04:33:05,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 399 transitions, 5212 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:05,643 INFO L231 Difference]: Finished difference. Result has 219 places, 355 transitions, 4529 flow [2024-06-28 04:33:05,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4529, PETRI_PLACES=219, PETRI_TRANSITIONS=355} [2024-06-28 04:33:05,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 04:33:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 355 transitions, 4529 flow [2024-06-28 04:33:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:05,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:05,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:05,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 04:33:05,644 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 04:33:05,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash -408911583, now seen corresponding path program 3 times [2024-06-28 04:33:05,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:05,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279708254] [2024-06-28 04:33:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:05,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:06,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:06,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279708254] [2024-06-28 04:33:06,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279708254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:06,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:06,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:06,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379902327] [2024-06-28 04:33:06,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:06,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:06,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:06,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:06,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:06,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 355 transitions, 4529 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:06,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:07,701 INFO L124 PetriNetUnfolderBase]: 2865/4477 cut-off events. [2024-06-28 04:33:07,701 INFO L125 PetriNetUnfolderBase]: For 304454/304454 co-relation queries the response was YES. [2024-06-28 04:33:07,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35023 conditions, 4477 events. 2865/4477 cut-off events. For 304454/304454 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25160 event pairs, 554 based on Foata normal form. 20/4490 useless extension candidates. Maximal degree in co-relation 34920. Up to 3371 conditions per place. [2024-06-28 04:33:07,856 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 245 selfloop transitions, 147 changer transitions 0/397 dead transitions. [2024-06-28 04:33:07,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 397 transitions, 5503 flow [2024-06-28 04:33:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 04:33:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-28 04:33:07,866 INFO L175 Difference]: Start difference. First operand has 219 places, 355 transitions, 4529 flow. Second operand 9 states and 175 transitions. [2024-06-28 04:33:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 397 transitions, 5503 flow [2024-06-28 04:33:08,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 397 transitions, 5188 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 04:33:08,445 INFO L231 Difference]: Finished difference. Result has 221 places, 355 transitions, 4521 flow [2024-06-28 04:33:08,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4521, PETRI_PLACES=221, PETRI_TRANSITIONS=355} [2024-06-28 04:33:08,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-28 04:33:08,445 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 355 transitions, 4521 flow [2024-06-28 04:33:08,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:08,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:08,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:08,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 04:33:08,446 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:08,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:08,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1136667705, now seen corresponding path program 4 times [2024-06-28 04:33:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:08,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927237959] [2024-06-28 04:33:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:08,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:09,480 INFO 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 04:33:09,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:09,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927237959] [2024-06-28 04:33:09,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927237959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:09,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:09,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784086465] [2024-06-28 04:33:09,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:09,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:09,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:09,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 355 transitions, 4521 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:09,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:09,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:09,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:10,766 INFO L124 PetriNetUnfolderBase]: 3068/4826 cut-off events. [2024-06-28 04:33:10,766 INFO L125 PetriNetUnfolderBase]: For 338102/338102 co-relation queries the response was YES. [2024-06-28 04:33:10,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37821 conditions, 4826 events. 3068/4826 cut-off events. For 338102/338102 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27757 event pairs, 707 based on Foata normal form. 16/4835 useless extension candidates. Maximal degree in co-relation 37717. Up to 4144 conditions per place. [2024-06-28 04:33:10,821 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 351 selfloop transitions, 45 changer transitions 0/401 dead transitions. [2024-06-28 04:33:10,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 401 transitions, 5776 flow [2024-06-28 04:33:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:33:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:33:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 04:33:10,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-28 04:33:10,826 INFO L175 Difference]: Start difference. First operand has 221 places, 355 transitions, 4521 flow. Second operand 10 states and 183 transitions. [2024-06-28 04:33:10,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 401 transitions, 5776 flow [2024-06-28 04:33:11,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 401 transitions, 5463 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 04:33:11,570 INFO L231 Difference]: Finished difference. Result has 225 places, 360 transitions, 4438 flow [2024-06-28 04:33:11,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4438, PETRI_PLACES=225, PETRI_TRANSITIONS=360} [2024-06-28 04:33:11,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-28 04:33:11,571 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 360 transitions, 4438 flow [2024-06-28 04:33:11,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:11,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:11,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:11,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 04:33:11,572 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:11,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:11,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2022556847, now seen corresponding path program 5 times [2024-06-28 04:33:11,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:11,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725042346] [2024-06-28 04:33:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:11,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:12,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725042346] [2024-06-28 04:33:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725042346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:12,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:12,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:12,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332902141] [2024-06-28 04:33:12,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:12,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:12,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:12,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 360 transitions, 4438 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:12,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:12,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:12,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:13,792 INFO L124 PetriNetUnfolderBase]: 3107/4898 cut-off events. [2024-06-28 04:33:13,793 INFO L125 PetriNetUnfolderBase]: For 356589/356589 co-relation queries the response was YES. [2024-06-28 04:33:13,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37146 conditions, 4898 events. 3107/4898 cut-off events. For 356589/356589 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 28366 event pairs, 706 based on Foata normal form. 40/4936 useless extension candidates. Maximal degree in co-relation 37039. Up to 4253 conditions per place. [2024-06-28 04:33:13,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 51 changer transitions 0/401 dead transitions. [2024-06-28 04:33:13,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 401 transitions, 5460 flow [2024-06-28 04:33:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:33:13,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 04:33:13,846 INFO L175 Difference]: Start difference. First operand has 225 places, 360 transitions, 4438 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:33:13,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 401 transitions, 5460 flow [2024-06-28 04:33:14,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 401 transitions, 5258 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:14,523 INFO L231 Difference]: Finished difference. Result has 229 places, 361 transitions, 4398 flow [2024-06-28 04:33:14,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4236, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4398, PETRI_PLACES=229, PETRI_TRANSITIONS=361} [2024-06-28 04:33:14,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-28 04:33:14,524 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 361 transitions, 4398 flow [2024-06-28 04:33:14,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:14,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:14,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:14,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 04:33:14,524 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 04:33:14,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:14,525 INFO L85 PathProgramCache]: Analyzing trace with hash 717452173, now seen corresponding path program 6 times [2024-06-28 04:33:14,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:14,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236399762] [2024-06-28 04:33:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:14,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:15,568 INFO 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 04:33:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:15,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236399762] [2024-06-28 04:33:15,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236399762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:15,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:15,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:15,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101530357] [2024-06-28 04:33:15,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:15,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:15,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:15,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:15,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 361 transitions, 4398 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:15,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:15,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:15,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:16,812 INFO L124 PetriNetUnfolderBase]: 3251/5124 cut-off events. [2024-06-28 04:33:16,812 INFO L125 PetriNetUnfolderBase]: For 361248/361248 co-relation queries the response was YES. [2024-06-28 04:33:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39246 conditions, 5124 events. 3251/5124 cut-off events. For 361248/361248 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29877 event pairs, 772 based on Foata normal form. 16/5138 useless extension candidates. Maximal degree in co-relation 39138. Up to 3992 conditions per place. [2024-06-28 04:33:16,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 57 changer transitions 0/415 dead transitions. [2024-06-28 04:33:16,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 415 transitions, 5724 flow [2024-06-28 04:33:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:33:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:33:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 04:33:16,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-28 04:33:16,873 INFO L175 Difference]: Start difference. First operand has 229 places, 361 transitions, 4398 flow. Second operand 10 states and 191 transitions. [2024-06-28 04:33:16,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 415 transitions, 5724 flow [2024-06-28 04:33:17,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 415 transitions, 5604 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 04:33:17,354 INFO L231 Difference]: Finished difference. Result has 232 places, 363 transitions, 4492 flow [2024-06-28 04:33:17,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4492, PETRI_PLACES=232, PETRI_TRANSITIONS=363} [2024-06-28 04:33:17,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-28 04:33:17,355 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 363 transitions, 4492 flow [2024-06-28 04:33:17,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:17,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:17,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:17,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 04:33:17,356 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 04:33:17,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1824123725, now seen corresponding path program 1 times [2024-06-28 04:33:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:17,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181233388] [2024-06-28 04:33:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:18,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:18,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181233388] [2024-06-28 04:33:18,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181233388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:18,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:18,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:18,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648556900] [2024-06-28 04:33:18,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:18,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:18,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:18,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:18,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 363 transitions, 4492 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:18,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:18,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:18,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:20,246 INFO L124 PetriNetUnfolderBase]: 3292/5187 cut-off events. [2024-06-28 04:33:20,246 INFO L125 PetriNetUnfolderBase]: For 370111/370111 co-relation queries the response was YES. [2024-06-28 04:33:20,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39872 conditions, 5187 events. 3292/5187 cut-off events. For 370111/370111 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30389 event pairs, 585 based on Foata normal form. 12/5192 useless extension candidates. Maximal degree in co-relation 39763. Up to 3575 conditions per place. [2024-06-28 04:33:20,303 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 252 selfloop transitions, 150 changer transitions 0/407 dead transitions. [2024-06-28 04:33:20,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 407 transitions, 5548 flow [2024-06-28 04:33:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 04:33:20,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-28 04:33:20,304 INFO L175 Difference]: Start difference. First operand has 232 places, 363 transitions, 4492 flow. Second operand 9 states and 176 transitions. [2024-06-28 04:33:20,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 407 transitions, 5548 flow [2024-06-28 04:33:21,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 407 transitions, 5445 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:21,046 INFO L231 Difference]: Finished difference. Result has 235 places, 364 transitions, 4745 flow [2024-06-28 04:33:21,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4745, PETRI_PLACES=235, PETRI_TRANSITIONS=364} [2024-06-28 04:33:21,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 04:33:21,047 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 364 transitions, 4745 flow [2024-06-28 04:33:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:21,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:21,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 04:33:21,048 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:21,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1847989777, now seen corresponding path program 1 times [2024-06-28 04:33:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:21,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673988209] [2024-06-28 04:33:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:21,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:21,625 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 04:33:21,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673988209] [2024-06-28 04:33:21,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673988209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:21,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:21,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:33:21,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868560181] [2024-06-28 04:33:21,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:33:21,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:21,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:33:21,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:33:21,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:21,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 364 transitions, 4745 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:21,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:21,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:21,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:22,583 INFO L124 PetriNetUnfolderBase]: 3289/5171 cut-off events. [2024-06-28 04:33:22,584 INFO L125 PetriNetUnfolderBase]: For 361735/361735 co-relation queries the response was YES. [2024-06-28 04:33:22,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40340 conditions, 5171 events. 3289/5171 cut-off events. For 361735/361735 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30158 event pairs, 881 based on Foata normal form. 1/5159 useless extension candidates. Maximal degree in co-relation 40229. Up to 4869 conditions per place. [2024-06-28 04:33:22,644 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 320 selfloop transitions, 51 changer transitions 0/376 dead transitions. [2024-06-28 04:33:22,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 376 transitions, 5569 flow [2024-06-28 04:33:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:33:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:33:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 04:33:22,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-28 04:33:22,645 INFO L175 Difference]: Start difference. First operand has 235 places, 364 transitions, 4745 flow. Second operand 6 states and 107 transitions. [2024-06-28 04:33:22,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 376 transitions, 5569 flow [2024-06-28 04:33:23,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 376 transitions, 5237 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 04:33:23,517 INFO L231 Difference]: Finished difference. Result has 234 places, 367 transitions, 4588 flow [2024-06-28 04:33:23,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4588, PETRI_PLACES=234, PETRI_TRANSITIONS=367} [2024-06-28 04:33:23,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-28 04:33:23,533 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 367 transitions, 4588 flow [2024-06-28 04:33:23,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:23,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:23,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:23,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 04:33:23,533 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:23,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:23,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1908580258, now seen corresponding path program 1 times [2024-06-28 04:33:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:23,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354851551] [2024-06-28 04:33:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:23,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:24,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354851551] [2024-06-28 04:33:24,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354851551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:24,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:24,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:24,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600012979] [2024-06-28 04:33:24,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:24,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:24,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:24,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:24,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 367 transitions, 4588 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:24,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:24,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:24,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:25,332 INFO L124 PetriNetUnfolderBase]: 3294/5204 cut-off events. [2024-06-28 04:33:25,333 INFO L125 PetriNetUnfolderBase]: For 366658/366661 co-relation queries the response was YES. [2024-06-28 04:33:25,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40105 conditions, 5204 events. 3294/5204 cut-off events. For 366658/366661 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30523 event pairs, 849 based on Foata normal form. 3/5201 useless extension candidates. Maximal degree in co-relation 39993. Up to 4830 conditions per place. [2024-06-28 04:33:25,390 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 51 changer transitions 0/390 dead transitions. [2024-06-28 04:33:25,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 390 transitions, 5490 flow [2024-06-28 04:33:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:33:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:33:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 04:33:25,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-28 04:33:25,392 INFO L175 Difference]: Start difference. First operand has 234 places, 367 transitions, 4588 flow. Second operand 7 states and 128 transitions. [2024-06-28 04:33:25,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 390 transitions, 5490 flow [2024-06-28 04:33:26,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 390 transitions, 5375 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 04:33:26,392 INFO L231 Difference]: Finished difference. Result has 237 places, 370 transitions, 4647 flow [2024-06-28 04:33:26,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4647, PETRI_PLACES=237, PETRI_TRANSITIONS=370} [2024-06-28 04:33:26,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-28 04:33:26,392 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 370 transitions, 4647 flow [2024-06-28 04:33:26,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:26,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:26,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:26,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 04:33:26,393 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:26,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:26,393 INFO L85 PathProgramCache]: Analyzing trace with hash -539013777, now seen corresponding path program 7 times [2024-06-28 04:33:26,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596580844] [2024-06-28 04:33:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:27,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:27,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596580844] [2024-06-28 04:33:27,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596580844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:27,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778482974] [2024-06-28 04:33:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:27,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:27,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:27,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 370 transitions, 4647 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:27,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:27,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:27,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:29,038 INFO L124 PetriNetUnfolderBase]: 3369/5317 cut-off events. [2024-06-28 04:33:29,038 INFO L125 PetriNetUnfolderBase]: For 406397/406397 co-relation queries the response was YES. [2024-06-28 04:33:29,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41265 conditions, 5317 events. 3369/5317 cut-off events. For 406397/406397 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31351 event pairs, 680 based on Foata normal form. 20/5324 useless extension candidates. Maximal degree in co-relation 41152. Up to 4236 conditions per place. [2024-06-28 04:33:29,102 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 144 changer transitions 0/408 dead transitions. [2024-06-28 04:33:29,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 408 transitions, 5673 flow [2024-06-28 04:33:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 04:33:29,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 04:33:29,104 INFO L175 Difference]: Start difference. First operand has 237 places, 370 transitions, 4647 flow. Second operand 9 states and 168 transitions. [2024-06-28 04:33:29,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 408 transitions, 5673 flow [2024-06-28 04:33:29,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 408 transitions, 5566 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:29,887 INFO L231 Difference]: Finished difference. Result has 240 places, 371 transitions, 4887 flow [2024-06-28 04:33:29,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4887, PETRI_PLACES=240, PETRI_TRANSITIONS=371} [2024-06-28 04:33:29,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-28 04:33:29,888 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 371 transitions, 4887 flow [2024-06-28 04:33:29,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:29,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:29,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:29,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 04:33:29,888 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:29,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:29,889 INFO L85 PathProgramCache]: Analyzing trace with hash 603845937, now seen corresponding path program 8 times [2024-06-28 04:33:29,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:29,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871438720] [2024-06-28 04:33:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:29,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:30,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:30,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871438720] [2024-06-28 04:33:30,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871438720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:30,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:30,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:30,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561300126] [2024-06-28 04:33:30,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:30,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:31,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:31,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 371 transitions, 4887 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:31,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:31,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:31,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:32,321 INFO L124 PetriNetUnfolderBase]: 3444/5448 cut-off events. [2024-06-28 04:33:32,321 INFO L125 PetriNetUnfolderBase]: For 415438/415438 co-relation queries the response was YES. [2024-06-28 04:33:32,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42788 conditions, 5448 events. 3444/5448 cut-off events. For 415438/415438 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 32429 event pairs, 722 based on Foata normal form. 20/5455 useless extension candidates. Maximal degree in co-relation 42675. Up to 4361 conditions per place. [2024-06-28 04:33:32,384 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 137 changer transitions 0/410 dead transitions. [2024-06-28 04:33:32,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 410 transitions, 5917 flow [2024-06-28 04:33:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 04:33:32,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 04:33:32,386 INFO L175 Difference]: Start difference. First operand has 240 places, 371 transitions, 4887 flow. Second operand 9 states and 172 transitions. [2024-06-28 04:33:32,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 410 transitions, 5917 flow [2024-06-28 04:33:33,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 410 transitions, 5602 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 04:33:33,465 INFO L231 Difference]: Finished difference. Result has 242 places, 372 transitions, 4907 flow [2024-06-28 04:33:33,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4907, PETRI_PLACES=242, PETRI_TRANSITIONS=372} [2024-06-28 04:33:33,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-28 04:33:33,466 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 372 transitions, 4907 flow [2024-06-28 04:33:33,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:33,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:33,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:33,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 04:33:33,466 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:33,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash 375767157, now seen corresponding path program 9 times [2024-06-28 04:33:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943035874] [2024-06-28 04:33:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:33,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:34,398 INFO 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 04:33:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:34,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943035874] [2024-06-28 04:33:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943035874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:34,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:34,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150162574] [2024-06-28 04:33:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:34,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:34,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:34,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:34,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 372 transitions, 4907 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:34,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:34,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:34,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:35,836 INFO L124 PetriNetUnfolderBase]: 3563/5658 cut-off events. [2024-06-28 04:33:35,836 INFO L125 PetriNetUnfolderBase]: For 443302/443302 co-relation queries the response was YES. [2024-06-28 04:33:35,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44842 conditions, 5658 events. 3563/5658 cut-off events. For 443302/443302 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33977 event pairs, 735 based on Foata normal form. 16/5661 useless extension candidates. Maximal degree in co-relation 44728. Up to 4114 conditions per place. [2024-06-28 04:33:35,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 270 selfloop transitions, 143 changer transitions 0/418 dead transitions. [2024-06-28 04:33:35,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 418 transitions, 6237 flow [2024-06-28 04:33:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 04:33:35,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-28 04:33:35,907 INFO L175 Difference]: Start difference. First operand has 242 places, 372 transitions, 4907 flow. Second operand 9 states and 177 transitions. [2024-06-28 04:33:35,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 418 transitions, 6237 flow [2024-06-28 04:33:37,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 418 transitions, 5934 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 04:33:37,102 INFO L231 Difference]: Finished difference. Result has 244 places, 374 transitions, 5002 flow [2024-06-28 04:33:37,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5002, PETRI_PLACES=244, PETRI_TRANSITIONS=374} [2024-06-28 04:33:37,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-28 04:33:37,102 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 374 transitions, 5002 flow [2024-06-28 04:33:37,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:37,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:37,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:37,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 04:33:37,103 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:37,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash 375944787, now seen corresponding path program 10 times [2024-06-28 04:33:37,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:37,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486148868] [2024-06-28 04:33:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:37,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:38,105 INFO 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 04:33:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:38,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486148868] [2024-06-28 04:33:38,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486148868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:38,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:38,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:33:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309452135] [2024-06-28 04:33:38,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:38,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:33:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:38,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:33:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:33:38,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:38,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 374 transitions, 5002 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:38,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:38,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:38,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:39,515 INFO L124 PetriNetUnfolderBase]: 3527/5602 cut-off events. [2024-06-28 04:33:39,516 INFO L125 PetriNetUnfolderBase]: For 430033/430033 co-relation queries the response was YES. [2024-06-28 04:33:39,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43395 conditions, 5602 events. 3527/5602 cut-off events. For 430033/430033 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33616 event pairs, 737 based on Foata normal form. 20/5609 useless extension candidates. Maximal degree in co-relation 43280. Up to 4506 conditions per place. [2024-06-28 04:33:39,577 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 139 changer transitions 0/412 dead transitions. [2024-06-28 04:33:39,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 412 transitions, 5986 flow [2024-06-28 04:33:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 04:33:39,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-28 04:33:39,579 INFO L175 Difference]: Start difference. First operand has 244 places, 374 transitions, 5002 flow. Second operand 9 states and 172 transitions. [2024-06-28 04:33:39,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 412 transitions, 5986 flow [2024-06-28 04:33:40,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 412 transitions, 5760 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 04:33:40,666 INFO L231 Difference]: Finished difference. Result has 248 places, 374 transitions, 5063 flow [2024-06-28 04:33:40,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5063, PETRI_PLACES=248, PETRI_TRANSITIONS=374} [2024-06-28 04:33:40,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-28 04:33:40,667 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 374 transitions, 5063 flow [2024-06-28 04:33:40,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:40,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:40,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:40,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 04:33:40,668 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:40,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash -652872415, now seen corresponding path program 2 times [2024-06-28 04:33:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:40,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52428267] [2024-06-28 04:33:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:40,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:42,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:42,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52428267] [2024-06-28 04:33:42,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52428267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:42,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:42,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:33:42,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28482758] [2024-06-28 04:33:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:42,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:33:42,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:33:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:33:42,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:42,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 374 transitions, 5063 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:42,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:42,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:42,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:43,401 INFO L124 PetriNetUnfolderBase]: 3568/5674 cut-off events. [2024-06-28 04:33:43,401 INFO L125 PetriNetUnfolderBase]: For 424670/424670 co-relation queries the response was YES. [2024-06-28 04:33:43,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44122 conditions, 5674 events. 3568/5674 cut-off events. For 424670/424670 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34379 event pairs, 727 based on Foata normal form. 12/5673 useless extension candidates. Maximal degree in co-relation 44005. Up to 4487 conditions per place. [2024-06-28 04:33:43,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 146 changer transitions 0/414 dead transitions. [2024-06-28 04:33:43,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 414 transitions, 6131 flow [2024-06-28 04:33:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 04:33:43,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-28 04:33:43,471 INFO L175 Difference]: Start difference. First operand has 248 places, 374 transitions, 5063 flow. Second operand 9 states and 170 transitions. [2024-06-28 04:33:43,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 414 transitions, 6131 flow [2024-06-28 04:33:44,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 414 transitions, 5833 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 04:33:44,378 INFO L231 Difference]: Finished difference. Result has 249 places, 375 transitions, 5119 flow [2024-06-28 04:33:44,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5119, PETRI_PLACES=249, PETRI_TRANSITIONS=375} [2024-06-28 04:33:44,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 04:33:44,378 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 375 transitions, 5119 flow [2024-06-28 04:33:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:44,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:44,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:44,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 04:33:44,379 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:44,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash -310285525, now seen corresponding path program 3 times [2024-06-28 04:33:44,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:44,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915315002] [2024-06-28 04:33:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:44,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:45,641 INFO 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 04:33:45,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:45,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915315002] [2024-06-28 04:33:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915315002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:45,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:45,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604436499] [2024-06-28 04:33:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:45,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:45,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:45,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:45,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:45,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:45,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 375 transitions, 5119 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:45,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:45,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:45,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:47,078 INFO L124 PetriNetUnfolderBase]: 3609/5755 cut-off events. [2024-06-28 04:33:47,078 INFO L125 PetriNetUnfolderBase]: For 441371/441371 co-relation queries the response was YES. [2024-06-28 04:33:47,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44845 conditions, 5755 events. 3609/5755 cut-off events. For 441371/441371 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35085 event pairs, 708 based on Foata normal form. 12/5754 useless extension candidates. Maximal degree in co-relation 44727. Up to 3412 conditions per place. [2024-06-28 04:33:47,148 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 253 selfloop transitions, 159 changer transitions 0/417 dead transitions. [2024-06-28 04:33:47,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 417 transitions, 6413 flow [2024-06-28 04:33:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 04:33:47,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:33:47,150 INFO L175 Difference]: Start difference. First operand has 249 places, 375 transitions, 5119 flow. Second operand 9 states and 171 transitions. [2024-06-28 04:33:47,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 417 transitions, 6413 flow [2024-06-28 04:33:48,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 417 transitions, 6081 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 04:33:48,276 INFO L231 Difference]: Finished difference. Result has 251 places, 376 transitions, 5167 flow [2024-06-28 04:33:48,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5167, PETRI_PLACES=251, PETRI_TRANSITIONS=376} [2024-06-28 04:33:48,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-28 04:33:48,277 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 376 transitions, 5167 flow [2024-06-28 04:33:48,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:48,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:48,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:48,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 04:33:48,278 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:48,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 726765263, now seen corresponding path program 4 times [2024-06-28 04:33:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80536438] [2024-06-28 04:33:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:49,605 INFO 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 04:33:49,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:49,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80536438] [2024-06-28 04:33:49,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80536438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:49,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:49,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:33:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559327346] [2024-06-28 04:33:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:33:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:33:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:33:49,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:49,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 376 transitions, 5167 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:49,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:49,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:49,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:51,125 INFO L124 PetriNetUnfolderBase]: 3589/5715 cut-off events. [2024-06-28 04:33:51,126 INFO L125 PetriNetUnfolderBase]: For 432917/432917 co-relation queries the response was YES. [2024-06-28 04:33:51,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44044 conditions, 5715 events. 3589/5715 cut-off events. For 432917/432917 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34726 event pairs, 752 based on Foata normal form. 12/5714 useless extension candidates. Maximal degree in co-relation 43925. Up to 4397 conditions per place. [2024-06-28 04:33:51,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 140 changer transitions 0/416 dead transitions. [2024-06-28 04:33:51,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 416 transitions, 6183 flow [2024-06-28 04:33:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:33:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:33:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 04:33:51,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-28 04:33:51,191 INFO L175 Difference]: Start difference. First operand has 251 places, 376 transitions, 5167 flow. Second operand 9 states and 173 transitions. [2024-06-28 04:33:51,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 416 transitions, 6183 flow [2024-06-28 04:33:52,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 416 transitions, 5867 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:52,359 INFO L231 Difference]: Finished difference. Result has 254 places, 376 transitions, 5137 flow [2024-06-28 04:33:52,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5137, PETRI_PLACES=254, PETRI_TRANSITIONS=376} [2024-06-28 04:33:52,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-28 04:33:52,360 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 376 transitions, 5137 flow [2024-06-28 04:33:52,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:52,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:52,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:52,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 04:33:52,361 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:52,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash -418415630, now seen corresponding path program 2 times [2024-06-28 04:33:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:52,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100524368] [2024-06-28 04:33:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:52,986 INFO 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 04:33:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:52,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100524368] [2024-06-28 04:33:52,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100524368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:52,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:52,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:52,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963786507] [2024-06-28 04:33:52,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:52,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:52,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:52,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:53,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:53,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 376 transitions, 5137 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:53,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:53,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:53,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:54,176 INFO L124 PetriNetUnfolderBase]: 3586/5718 cut-off events. [2024-06-28 04:33:54,176 INFO L125 PetriNetUnfolderBase]: For 420444/420444 co-relation queries the response was YES. [2024-06-28 04:33:54,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43845 conditions, 5718 events. 3586/5718 cut-off events. For 420444/420444 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34752 event pairs, 931 based on Foata normal form. 1/5712 useless extension candidates. Maximal degree in co-relation 43725. Up to 5339 conditions per place. [2024-06-28 04:33:54,235 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 338 selfloop transitions, 50 changer transitions 0/393 dead transitions. [2024-06-28 04:33:54,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 393 transitions, 5981 flow [2024-06-28 04:33:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:33:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:33:54,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 04:33:54,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 04:33:54,236 INFO L175 Difference]: Start difference. First operand has 254 places, 376 transitions, 5137 flow. Second operand 7 states and 124 transitions. [2024-06-28 04:33:54,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 393 transitions, 5981 flow [2024-06-28 04:33:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 393 transitions, 5322 flow, removed 21 selfloop flow, removed 12 redundant places. [2024-06-28 04:33:54,939 INFO L231 Difference]: Finished difference. Result has 249 places, 376 transitions, 4590 flow [2024-06-28 04:33:54,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4590, PETRI_PLACES=249, PETRI_TRANSITIONS=376} [2024-06-28 04:33:54,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-28 04:33:54,940 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 376 transitions, 4590 flow [2024-06-28 04:33:54,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:54,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:54,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:54,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 04:33:54,941 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:54,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash -405083150, now seen corresponding path program 3 times [2024-06-28 04:33:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687912424] [2024-06-28 04:33:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:55,722 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 04:33:55,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:55,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687912424] [2024-06-28 04:33:55,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687912424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:55,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:55,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:55,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315555602] [2024-06-28 04:33:55,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:55,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:55,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:55,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:55,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 376 transitions, 4590 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:55,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:55,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:55,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:56,927 INFO L124 PetriNetUnfolderBase]: 3576/5714 cut-off events. [2024-06-28 04:33:56,928 INFO L125 PetriNetUnfolderBase]: For 422929/422929 co-relation queries the response was YES. [2024-06-28 04:33:56,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41396 conditions, 5714 events. 3576/5714 cut-off events. For 422929/422929 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 34828 event pairs, 916 based on Foata normal form. 2/5709 useless extension candidates. Maximal degree in co-relation 41279. Up to 5218 conditions per place. [2024-06-28 04:33:56,987 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 314 selfloop transitions, 72 changer transitions 0/391 dead transitions. [2024-06-28 04:33:56,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 391 transitions, 5420 flow [2024-06-28 04:33:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:33:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:33:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 04:33:56,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 04:33:56,988 INFO L175 Difference]: Start difference. First operand has 249 places, 376 transitions, 4590 flow. Second operand 7 states and 124 transitions. [2024-06-28 04:33:56,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 391 transitions, 5420 flow [2024-06-28 04:33:57,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 391 transitions, 5311 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 04:33:57,819 INFO L231 Difference]: Finished difference. Result has 250 places, 376 transitions, 4641 flow [2024-06-28 04:33:57,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4641, PETRI_PLACES=250, PETRI_TRANSITIONS=376} [2024-06-28 04:33:57,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-28 04:33:57,820 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 376 transitions, 4641 flow [2024-06-28 04:33:57,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:57,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:33:57,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:33:57,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 04:33:57,820 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:33:57,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:33:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -405260433, now seen corresponding path program 1 times [2024-06-28 04:33:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:33:57,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357537903] [2024-06-28 04:33:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:33:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:33:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:33:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:33:58,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:33:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357537903] [2024-06-28 04:33:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357537903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:33:58,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:33:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:33:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292010128] [2024-06-28 04:33:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:33:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:33:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:33:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:33:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:33:58,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:33:58,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 376 transitions, 4641 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:33:58,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:33:58,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:33:58,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:33:59,792 INFO L124 PetriNetUnfolderBase]: 3615/5780 cut-off events. [2024-06-28 04:33:59,792 INFO L125 PetriNetUnfolderBase]: For 438589/438592 co-relation queries the response was YES. [2024-06-28 04:33:59,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41873 conditions, 5780 events. 3615/5780 cut-off events. For 438589/438592 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35280 event pairs, 944 based on Foata normal form. 10/5773 useless extension candidates. Maximal degree in co-relation 41756. Up to 5123 conditions per place. [2024-06-28 04:33:59,852 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 291 selfloop transitions, 105 changer transitions 0/401 dead transitions. [2024-06-28 04:33:59,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 401 transitions, 5624 flow [2024-06-28 04:33:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:33:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:33:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:33:59,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 04:33:59,854 INFO L175 Difference]: Start difference. First operand has 250 places, 376 transitions, 4641 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:33:59,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 401 transitions, 5624 flow [2024-06-28 04:34:01,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 401 transitions, 5435 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:01,026 INFO L231 Difference]: Finished difference. Result has 252 places, 385 transitions, 4835 flow [2024-06-28 04:34:01,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4835, PETRI_PLACES=252, PETRI_TRANSITIONS=385} [2024-06-28 04:34:01,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-28 04:34:01,027 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 385 transitions, 4835 flow [2024-06-28 04:34:01,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:01,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:01,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 04:34:01,027 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:01,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1030509771, now seen corresponding path program 2 times [2024-06-28 04:34:01,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970327477] [2024-06-28 04:34:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:01,765 INFO 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 04:34:01,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:01,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970327477] [2024-06-28 04:34:01,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970327477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:01,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:01,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:01,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454896928] [2024-06-28 04:34:01,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:01,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:01,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:01,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:01,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 385 transitions, 4835 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:01,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:01,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:01,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:03,144 INFO L124 PetriNetUnfolderBase]: 3697/5916 cut-off events. [2024-06-28 04:34:03,145 INFO L125 PetriNetUnfolderBase]: For 465448/465451 co-relation queries the response was YES. [2024-06-28 04:34:03,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43860 conditions, 5916 events. 3697/5916 cut-off events. For 465448/465451 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36327 event pairs, 954 based on Foata normal form. 8/5907 useless extension candidates. Maximal degree in co-relation 43742. Up to 5078 conditions per place. [2024-06-28 04:34:03,213 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 111 changer transitions 0/412 dead transitions. [2024-06-28 04:34:03,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 412 transitions, 6172 flow [2024-06-28 04:34:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:34:03,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:34:03,215 INFO L175 Difference]: Start difference. First operand has 252 places, 385 transitions, 4835 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:34:03,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 412 transitions, 6172 flow [2024-06-28 04:34:04,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 412 transitions, 5853 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-28 04:34:04,339 INFO L231 Difference]: Finished difference. Result has 256 places, 393 transitions, 4952 flow [2024-06-28 04:34:04,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4516, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4952, PETRI_PLACES=256, PETRI_TRANSITIONS=393} [2024-06-28 04:34:04,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-28 04:34:04,347 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 393 transitions, 4952 flow [2024-06-28 04:34:04,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:04,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:04,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:04,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:34:04,348 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:04,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:04,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1014781611, now seen corresponding path program 3 times [2024-06-28 04:34:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:04,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68806989] [2024-06-28 04:34:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:04,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:05,098 INFO 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 04:34:05,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:05,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68806989] [2024-06-28 04:34:05,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68806989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:05,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:05,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386393783] [2024-06-28 04:34:05,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:05,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:05,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:05,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:05,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:05,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 393 transitions, 4952 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:05,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:05,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:05,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:06,391 INFO L124 PetriNetUnfolderBase]: 3702/5923 cut-off events. [2024-06-28 04:34:06,391 INFO L125 PetriNetUnfolderBase]: For 477962/477965 co-relation queries the response was YES. [2024-06-28 04:34:06,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44049 conditions, 5923 events. 3702/5923 cut-off events. For 477962/477965 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36334 event pairs, 973 based on Foata normal form. 10/5916 useless extension candidates. Maximal degree in co-relation 43929. Up to 5201 conditions per place. [2024-06-28 04:34:06,461 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 303 selfloop transitions, 103 changer transitions 0/411 dead transitions. [2024-06-28 04:34:06,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 411 transitions, 5870 flow [2024-06-28 04:34:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:34:06,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 04:34:06,462 INFO L175 Difference]: Start difference. First operand has 256 places, 393 transitions, 4952 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:34:06,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 411 transitions, 5870 flow [2024-06-28 04:34:07,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 411 transitions, 5637 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-28 04:34:07,748 INFO L231 Difference]: Finished difference. Result has 262 places, 395 transitions, 4996 flow [2024-06-28 04:34:07,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4996, PETRI_PLACES=262, PETRI_TRANSITIONS=395} [2024-06-28 04:34:07,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-28 04:34:07,748 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 395 transitions, 4996 flow [2024-06-28 04:34:07,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:07,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:07,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:07,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:34:07,749 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:07,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:07,749 INFO L85 PathProgramCache]: Analyzing trace with hash 791613479, now seen corresponding path program 11 times [2024-06-28 04:34:07,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:07,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154359319] [2024-06-28 04:34:07,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:07,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:08,771 INFO 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 04:34:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154359319] [2024-06-28 04:34:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154359319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:08,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:08,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:08,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471514691] [2024-06-28 04:34:08,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:08,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:08,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:08,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:08,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:08,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 395 transitions, 4996 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:08,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:08,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:08,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:10,349 INFO L124 PetriNetUnfolderBase]: 4069/6510 cut-off events. [2024-06-28 04:34:10,350 INFO L125 PetriNetUnfolderBase]: For 514230/514230 co-relation queries the response was YES. [2024-06-28 04:34:10,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 6510 events. 4069/6510 cut-off events. For 514230/514230 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40722 event pairs, 986 based on Foata normal form. 16/6524 useless extension candidates. Maximal degree in co-relation 47371. Up to 5726 conditions per place. [2024-06-28 04:34:10,553 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 410 selfloop transitions, 52 changer transitions 0/467 dead transitions. [2024-06-28 04:34:10,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 467 transitions, 6493 flow [2024-06-28 04:34:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:34:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:34:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-28 04:34:10,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-28 04:34:10,555 INFO L175 Difference]: Start difference. First operand has 262 places, 395 transitions, 4996 flow. Second operand 10 states and 188 transitions. [2024-06-28 04:34:10,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 467 transitions, 6493 flow [2024-06-28 04:34:11,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 467 transitions, 6212 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:11,583 INFO L231 Difference]: Finished difference. Result has 269 places, 420 transitions, 5244 flow [2024-06-28 04:34:11,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5244, PETRI_PLACES=269, PETRI_TRANSITIONS=420} [2024-06-28 04:34:11,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-28 04:34:11,584 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 420 transitions, 5244 flow [2024-06-28 04:34:11,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:11,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:11,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:34:11,585 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:11,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash -246575887, now seen corresponding path program 12 times [2024-06-28 04:34:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745053084] [2024-06-28 04:34:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:11,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:12,501 INFO 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 04:34:12,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745053084] [2024-06-28 04:34:12,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745053084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:12,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:12,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:12,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366100521] [2024-06-28 04:34:12,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:12,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:12,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:12,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:12,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 420 transitions, 5244 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:12,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:12,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:12,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:14,384 INFO L124 PetriNetUnfolderBase]: 4322/6914 cut-off events. [2024-06-28 04:34:14,384 INFO L125 PetriNetUnfolderBase]: For 507426/507426 co-relation queries the response was YES. [2024-06-28 04:34:14,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49272 conditions, 6914 events. 4322/6914 cut-off events. For 507426/507426 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43809 event pairs, 967 based on Foata normal form. 16/6928 useless extension candidates. Maximal degree in co-relation 49145. Up to 5828 conditions per place. [2024-06-28 04:34:14,456 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 405 selfloop transitions, 92 changer transitions 0/502 dead transitions. [2024-06-28 04:34:14,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 502 transitions, 6801 flow [2024-06-28 04:34:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:34:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:34:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 223 transitions. [2024-06-28 04:34:14,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44246031746031744 [2024-06-28 04:34:14,457 INFO L175 Difference]: Start difference. First operand has 269 places, 420 transitions, 5244 flow. Second operand 12 states and 223 transitions. [2024-06-28 04:34:14,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 502 transitions, 6801 flow [2024-06-28 04:34:15,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 502 transitions, 6672 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-28 04:34:15,627 INFO L231 Difference]: Finished difference. Result has 280 places, 443 transitions, 5661 flow [2024-06-28 04:34:15,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5661, PETRI_PLACES=280, PETRI_TRANSITIONS=443} [2024-06-28 04:34:15,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-28 04:34:15,627 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 443 transitions, 5661 flow [2024-06-28 04:34:15,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:15,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:15,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:15,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:34:15,628 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:15,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash -923660817, now seen corresponding path program 1 times [2024-06-28 04:34:15,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:15,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232479137] [2024-06-28 04:34:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:15,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:16,533 INFO 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 04:34:16,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:16,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232479137] [2024-06-28 04:34:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232479137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:16,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26602298] [2024-06-28 04:34:16,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:16,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:16,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 443 transitions, 5661 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:16,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:16,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:18,207 INFO L124 PetriNetUnfolderBase]: 4378/6997 cut-off events. [2024-06-28 04:34:18,207 INFO L125 PetriNetUnfolderBase]: For 508738/508738 co-relation queries the response was YES. [2024-06-28 04:34:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50771 conditions, 6997 events. 4378/6997 cut-off events. For 508738/508738 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44357 event pairs, 1163 based on Foata normal form. 4/6995 useless extension candidates. Maximal degree in co-relation 50640. Up to 6368 conditions per place. [2024-06-28 04:34:18,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 73 changer transitions 0/473 dead transitions. [2024-06-28 04:34:18,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 473 transitions, 6993 flow [2024-06-28 04:34:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:34:18,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 04:34:18,298 INFO L175 Difference]: Start difference. First operand has 280 places, 443 transitions, 5661 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:34:18,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 473 transitions, 6993 flow [2024-06-28 04:34:19,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 473 transitions, 6749 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 04:34:19,784 INFO L231 Difference]: Finished difference. Result has 282 places, 451 transitions, 5743 flow [2024-06-28 04:34:19,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5419, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5743, PETRI_PLACES=282, PETRI_TRANSITIONS=451} [2024-06-28 04:34:19,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 04:34:19,785 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 451 transitions, 5743 flow [2024-06-28 04:34:19,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:19,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:19,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:34:19,785 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:19,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash -405073075, now seen corresponding path program 2 times [2024-06-28 04:34:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:19,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546358152] [2024-06-28 04:34:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:20,763 INFO 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 04:34:20,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:20,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546358152] [2024-06-28 04:34:20,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546358152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:20,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:20,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:20,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581541756] [2024-06-28 04:34:20,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:20,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:20,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 451 transitions, 5743 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:20,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:20,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:20,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:22,549 INFO L124 PetriNetUnfolderBase]: 4450/7101 cut-off events. [2024-06-28 04:34:22,549 INFO L125 PetriNetUnfolderBase]: For 540745/540745 co-relation queries the response was YES. [2024-06-28 04:34:22,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52300 conditions, 7101 events. 4450/7101 cut-off events. For 540745/540745 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45007 event pairs, 1176 based on Foata normal form. 4/7098 useless extension candidates. Maximal degree in co-relation 52168. Up to 6258 conditions per place. [2024-06-28 04:34:22,629 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 98 changer transitions 0/481 dead transitions. [2024-06-28 04:34:22,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 481 transitions, 7272 flow [2024-06-28 04:34:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:34:22,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:34:22,631 INFO L175 Difference]: Start difference. First operand has 282 places, 451 transitions, 5743 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:34:22,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 481 transitions, 7272 flow [2024-06-28 04:34:24,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 481 transitions, 7106 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-28 04:34:24,095 INFO L231 Difference]: Finished difference. Result has 287 places, 459 transitions, 5970 flow [2024-06-28 04:34:24,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5970, PETRI_PLACES=287, PETRI_TRANSITIONS=459} [2024-06-28 04:34:24,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 04:34:24,095 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 459 transitions, 5970 flow [2024-06-28 04:34:24,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:24,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:24,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:34:24,096 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:24,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:24,096 INFO L85 PathProgramCache]: Analyzing trace with hash 864339057, now seen corresponding path program 3 times [2024-06-28 04:34:24,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:24,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265171130] [2024-06-28 04:34:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:24,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:24,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265171130] [2024-06-28 04:34:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265171130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:24,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:24,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:24,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484049033] [2024-06-28 04:34:24,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:24,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:24,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:24,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:24,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:25,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:25,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 459 transitions, 5970 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:25,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:25,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:25,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:26,727 INFO L124 PetriNetUnfolderBase]: 4454/7107 cut-off events. [2024-06-28 04:34:26,727 INFO L125 PetriNetUnfolderBase]: For 552519/552519 co-relation queries the response was YES. [2024-06-28 04:34:26,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53128 conditions, 7107 events. 4454/7107 cut-off events. For 552519/552519 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 45067 event pairs, 1161 based on Foata normal form. 4/7104 useless extension candidates. Maximal degree in co-relation 52993. Up to 6265 conditions per place. [2024-06-28 04:34:26,808 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 113 changer transitions 0/489 dead transitions. [2024-06-28 04:34:26,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 489 transitions, 7301 flow [2024-06-28 04:34:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 04:34:26,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-28 04:34:26,810 INFO L175 Difference]: Start difference. First operand has 287 places, 459 transitions, 5970 flow. Second operand 9 states and 161 transitions. [2024-06-28 04:34:26,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 489 transitions, 7301 flow [2024-06-28 04:34:28,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 489 transitions, 7007 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-28 04:34:28,296 INFO L231 Difference]: Finished difference. Result has 291 places, 463 transitions, 6009 flow [2024-06-28 04:34:28,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6009, PETRI_PLACES=291, PETRI_TRANSITIONS=463} [2024-06-28 04:34:28,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-28 04:34:28,297 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 463 transitions, 6009 flow [2024-06-28 04:34:28,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:28,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:28,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:28,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:34:28,298 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:28,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash -260967219, now seen corresponding path program 1 times [2024-06-28 04:34:28,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:28,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685965709] [2024-06-28 04:34:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:29,042 INFO 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 04:34:29,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:29,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685965709] [2024-06-28 04:34:29,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685965709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:29,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:29,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:29,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369676652] [2024-06-28 04:34:29,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:29,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:29,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:29,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:29,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 463 transitions, 6009 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:29,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:29,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:29,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:30,646 INFO L124 PetriNetUnfolderBase]: 4506/7184 cut-off events. [2024-06-28 04:34:30,646 INFO L125 PetriNetUnfolderBase]: For 575093/575096 co-relation queries the response was YES. [2024-06-28 04:34:30,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53342 conditions, 7184 events. 4506/7184 cut-off events. For 575093/575096 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 45693 event pairs, 1274 based on Foata normal form. 10/7182 useless extension candidates. Maximal degree in co-relation 53206. Up to 6638 conditions per place. [2024-06-28 04:34:30,741 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 419 selfloop transitions, 68 changer transitions 0/492 dead transitions. [2024-06-28 04:34:30,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 492 transitions, 7196 flow [2024-06-28 04:34:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:34:30,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:34:30,743 INFO L175 Difference]: Start difference. First operand has 291 places, 463 transitions, 6009 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:34:30,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 492 transitions, 7196 flow [2024-06-28 04:34:32,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 492 transitions, 6974 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:32,696 INFO L231 Difference]: Finished difference. Result has 295 places, 470 transitions, 6062 flow [2024-06-28 04:34:32,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6062, PETRI_PLACES=295, PETRI_TRANSITIONS=470} [2024-06-28 04:34:32,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-28 04:34:32,697 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 470 transitions, 6062 flow [2024-06-28 04:34:32,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:32,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:32,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:32,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:34:32,698 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:32,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:32,698 INFO L85 PathProgramCache]: Analyzing trace with hash 764283259, now seen corresponding path program 4 times [2024-06-28 04:34:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:32,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65058161] [2024-06-28 04:34:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:32,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65058161] [2024-06-28 04:34:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65058161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:33,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:33,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687860919] [2024-06-28 04:34:33,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:33,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:33,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:33,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:33,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:33,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 470 transitions, 6062 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:33,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:33,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:33,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:35,176 INFO L124 PetriNetUnfolderBase]: 4590/7299 cut-off events. [2024-06-28 04:34:35,176 INFO L125 PetriNetUnfolderBase]: For 608424/608424 co-relation queries the response was YES. [2024-06-28 04:34:35,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54931 conditions, 7299 events. 4590/7299 cut-off events. For 608424/608424 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46402 event pairs, 1253 based on Foata normal form. 4/7283 useless extension candidates. Maximal degree in co-relation 54793. Up to 6005 conditions per place. [2024-06-28 04:34:35,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 137 changer transitions 0/510 dead transitions. [2024-06-28 04:34:35,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 510 transitions, 8013 flow [2024-06-28 04:34:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 04:34:35,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 04:34:35,273 INFO L175 Difference]: Start difference. First operand has 295 places, 470 transitions, 6062 flow. Second operand 8 states and 152 transitions. [2024-06-28 04:34:35,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 510 transitions, 8013 flow [2024-06-28 04:34:37,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 510 transitions, 7822 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:34:37,299 INFO L231 Difference]: Finished difference. Result has 299 places, 486 transitions, 6533 flow [2024-06-28 04:34:37,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6533, PETRI_PLACES=299, PETRI_TRANSITIONS=486} [2024-06-28 04:34:37,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-28 04:34:37,300 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 486 transitions, 6533 flow [2024-06-28 04:34:37,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:37,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:37,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:37,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:34:37,301 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:37,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:37,301 INFO L85 PathProgramCache]: Analyzing trace with hash 764277679, now seen corresponding path program 5 times [2024-06-28 04:34:37,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:37,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030743601] [2024-06-28 04:34:37,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:37,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:38,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:38,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030743601] [2024-06-28 04:34:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030743601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:38,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:38,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256277579] [2024-06-28 04:34:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:38,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:38,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:38,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 486 transitions, 6533 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:38,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:38,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:38,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:40,159 INFO L124 PetriNetUnfolderBase]: 4582/7293 cut-off events. [2024-06-28 04:34:40,159 INFO L125 PetriNetUnfolderBase]: For 614738/614738 co-relation queries the response was YES. [2024-06-28 04:34:40,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55730 conditions, 7293 events. 4582/7293 cut-off events. For 614738/614738 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 46423 event pairs, 1260 based on Foata normal form. 4/7277 useless extension candidates. Maximal degree in co-relation 55589. Up to 6248 conditions per place. [2024-06-28 04:34:40,255 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 383 selfloop transitions, 120 changer transitions 0/508 dead transitions. [2024-06-28 04:34:40,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 508 transitions, 8014 flow [2024-06-28 04:34:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:34:40,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:34:40,257 INFO L175 Difference]: Start difference. First operand has 299 places, 486 transitions, 6533 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:34:40,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 508 transitions, 8014 flow [2024-06-28 04:34:42,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 508 transitions, 7764 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-06-28 04:34:42,166 INFO L231 Difference]: Finished difference. Result has 306 places, 488 transitions, 6599 flow [2024-06-28 04:34:42,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6599, PETRI_PLACES=306, PETRI_TRANSITIONS=488} [2024-06-28 04:34:42,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 04:34:42,167 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 488 transitions, 6599 flow [2024-06-28 04:34:42,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:42,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:42,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:42,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:34:42,168 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:42,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash 283792713, now seen corresponding path program 2 times [2024-06-28 04:34:42,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:42,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777139071] [2024-06-28 04:34:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:42,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:42,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777139071] [2024-06-28 04:34:42,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777139071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:42,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:42,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:34:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517397293] [2024-06-28 04:34:42,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:34:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:34:42,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:34:42,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:42,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 488 transitions, 6599 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:42,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:42,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:42,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:44,464 INFO L124 PetriNetUnfolderBase]: 4614/7334 cut-off events. [2024-06-28 04:34:44,464 INFO L125 PetriNetUnfolderBase]: For 640215/640218 co-relation queries the response was YES. [2024-06-28 04:34:44,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56159 conditions, 7334 events. 4614/7334 cut-off events. For 640215/640218 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46723 event pairs, 1300 based on Foata normal form. 10/7327 useless extension candidates. Maximal degree in co-relation 56015. Up to 6597 conditions per place. [2024-06-28 04:34:44,569 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 383 selfloop transitions, 123 changer transitions 0/511 dead transitions. [2024-06-28 04:34:44,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 511 transitions, 7778 flow [2024-06-28 04:34:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:34:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:34:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 04:34:44,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:34:44,571 INFO L175 Difference]: Start difference. First operand has 306 places, 488 transitions, 6599 flow. Second operand 10 states and 170 transitions. [2024-06-28 04:34:44,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 511 transitions, 7778 flow [2024-06-28 04:34:46,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 511 transitions, 7618 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 04:34:46,127 INFO L231 Difference]: Finished difference. Result has 312 places, 491 transitions, 6789 flow [2024-06-28 04:34:46,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6439, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6789, PETRI_PLACES=312, PETRI_TRANSITIONS=491} [2024-06-28 04:34:46,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 04:34:46,128 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 491 transitions, 6789 flow [2024-06-28 04:34:46,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:46,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:46,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:46,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:34:46,129 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:46,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1030516715, now seen corresponding path program 3 times [2024-06-28 04:34:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:46,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505799104] [2024-06-28 04:34:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:46,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505799104] [2024-06-28 04:34:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505799104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:46,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:46,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:46,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200552365] [2024-06-28 04:34:46,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:46,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:46,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 491 transitions, 6789 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:46,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:46,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:46,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:48,365 INFO L124 PetriNetUnfolderBase]: 4620/7346 cut-off events. [2024-06-28 04:34:48,365 INFO L125 PetriNetUnfolderBase]: For 643510/643513 co-relation queries the response was YES. [2024-06-28 04:34:48,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56193 conditions, 7346 events. 4620/7346 cut-off events. For 643510/643513 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46795 event pairs, 1280 based on Foata normal form. 10/7339 useless extension candidates. Maximal degree in co-relation 56048. Up to 6431 conditions per place. [2024-06-28 04:34:48,467 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 139 changer transitions 0/512 dead transitions. [2024-06-28 04:34:48,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 512 transitions, 8132 flow [2024-06-28 04:34:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:34:48,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:34:48,469 INFO L175 Difference]: Start difference. First operand has 312 places, 491 transitions, 6789 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:34:48,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 512 transitions, 8132 flow [2024-06-28 04:34:50,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 512 transitions, 7752 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-28 04:34:50,180 INFO L231 Difference]: Finished difference. Result has 312 places, 494 transitions, 6797 flow [2024-06-28 04:34:50,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6797, PETRI_PLACES=312, PETRI_TRANSITIONS=494} [2024-06-28 04:34:50,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 04:34:50,181 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 494 transitions, 6797 flow [2024-06-28 04:34:50,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:50,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:50,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:50,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:34:50,182 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:50,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1020985579, now seen corresponding path program 6 times [2024-06-28 04:34:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:50,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408614231] [2024-06-28 04:34:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:51,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408614231] [2024-06-28 04:34:51,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408614231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:51,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:51,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:34:51,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543680533] [2024-06-28 04:34:51,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:51,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:34:51,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:51,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:34:51,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:34:51,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:51,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 494 transitions, 6797 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:51,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:51,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:51,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:52,851 INFO L124 PetriNetUnfolderBase]: 4644/7393 cut-off events. [2024-06-28 04:34:52,852 INFO L125 PetriNetUnfolderBase]: For 652335/652335 co-relation queries the response was YES. [2024-06-28 04:34:52,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56300 conditions, 7393 events. 4644/7393 cut-off events. For 652335/652335 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 47143 event pairs, 1241 based on Foata normal form. 8/7381 useless extension candidates. Maximal degree in co-relation 56154. Up to 6089 conditions per place. [2024-06-28 04:34:52,949 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 168 changer transitions 0/525 dead transitions. [2024-06-28 04:34:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 525 transitions, 8486 flow [2024-06-28 04:34:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:34:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:34:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 04:34:52,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-28 04:34:52,951 INFO L175 Difference]: Start difference. First operand has 312 places, 494 transitions, 6797 flow. Second operand 8 states and 151 transitions. [2024-06-28 04:34:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 525 transitions, 8486 flow [2024-06-28 04:34:54,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 525 transitions, 8136 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 04:34:54,546 INFO L231 Difference]: Finished difference. Result has 315 places, 505 transitions, 7046 flow [2024-06-28 04:34:54,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7046, PETRI_PLACES=315, PETRI_TRANSITIONS=505} [2024-06-28 04:34:54,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-28 04:34:54,547 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 505 transitions, 7046 flow [2024-06-28 04:34:54,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:54,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:54,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:54,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:34:54,548 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:54,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:54,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1020993515, now seen corresponding path program 4 times [2024-06-28 04:34:54,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:54,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544363872] [2024-06-28 04:34:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:54,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:34:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:34:55,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:34:55,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544363872] [2024-06-28 04:34:55,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544363872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:34:55,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:34:55,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:34:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086003559] [2024-06-28 04:34:55,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:34:55,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:34:55,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:34:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:34:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:34:55,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:34:55,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 505 transitions, 7046 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:55,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:34:55,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:34:55,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:34:57,226 INFO L124 PetriNetUnfolderBase]: 4696/7452 cut-off events. [2024-06-28 04:34:57,226 INFO L125 PetriNetUnfolderBase]: For 666844/666847 co-relation queries the response was YES. [2024-06-28 04:34:57,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57007 conditions, 7452 events. 4696/7452 cut-off events. For 666844/666847 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 47425 event pairs, 1313 based on Foata normal form. 10/7445 useless extension candidates. Maximal degree in co-relation 56860. Up to 6763 conditions per place. [2024-06-28 04:34:57,328 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 111 changer transitions 0/530 dead transitions. [2024-06-28 04:34:57,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 530 transitions, 8303 flow [2024-06-28 04:34:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:34:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:34:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 04:34:57,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 04:34:57,330 INFO L175 Difference]: Start difference. First operand has 315 places, 505 transitions, 7046 flow. Second operand 9 states and 154 transitions. [2024-06-28 04:34:57,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 530 transitions, 8303 flow [2024-06-28 04:34:59,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 530 transitions, 8125 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-28 04:34:59,366 INFO L231 Difference]: Finished difference. Result has 322 places, 512 transitions, 7253 flow [2024-06-28 04:34:59,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6868, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7253, PETRI_PLACES=322, PETRI_TRANSITIONS=512} [2024-06-28 04:34:59,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-28 04:34:59,366 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 512 transitions, 7253 flow [2024-06-28 04:34:59,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:34:59,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:34:59,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:34:59,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:34:59,367 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:34:59,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:34:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash 764493005, now seen corresponding path program 5 times [2024-06-28 04:34:59,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:34:59,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065800506] [2024-06-28 04:34:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:34:59,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:34:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:00,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:00,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065800506] [2024-06-28 04:35:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065800506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:00,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:00,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:35:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3996927] [2024-06-28 04:35:00,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:00,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:35:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:35:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:35:00,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:00,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 512 transitions, 7253 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:00,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:00,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:00,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:02,029 INFO L124 PetriNetUnfolderBase]: 4709/7473 cut-off events. [2024-06-28 04:35:02,029 INFO L125 PetriNetUnfolderBase]: For 665243/665246 co-relation queries the response was YES. [2024-06-28 04:35:02,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57246 conditions, 7473 events. 4709/7473 cut-off events. For 665243/665246 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 47623 event pairs, 1328 based on Foata normal form. 10/7466 useless extension candidates. Maximal degree in co-relation 57096. Up to 6782 conditions per place. [2024-06-28 04:35:02,145 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 435 selfloop transitions, 97 changer transitions 0/537 dead transitions. [2024-06-28 04:35:02,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 537 transitions, 8538 flow [2024-06-28 04:35:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:35:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:35:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 04:35:02,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-28 04:35:02,147 INFO L175 Difference]: Start difference. First operand has 322 places, 512 transitions, 7253 flow. Second operand 9 states and 154 transitions. [2024-06-28 04:35:02,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 537 transitions, 8538 flow [2024-06-28 04:35:04,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 537 transitions, 8247 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:04,042 INFO L231 Difference]: Finished difference. Result has 326 places, 519 transitions, 7333 flow [2024-06-28 04:35:04,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6962, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7333, PETRI_PLACES=326, PETRI_TRANSITIONS=519} [2024-06-28 04:35:04,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-28 04:35:04,043 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 519 transitions, 7333 flow [2024-06-28 04:35:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:04,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:04,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:04,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:35:04,044 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:04,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:04,044 INFO L85 PathProgramCache]: Analyzing trace with hash -758859830, now seen corresponding path program 1 times [2024-06-28 04:35:04,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:04,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440709497] [2024-06-28 04:35:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:04,649 INFO 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 04:35:04,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:04,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440709497] [2024-06-28 04:35:04,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440709497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:04,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:04,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:04,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657312568] [2024-06-28 04:35:04,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:04,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:04,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:04,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 519 transitions, 7333 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:04,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:04,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:04,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:06,339 INFO L124 PetriNetUnfolderBase]: 4719/7495 cut-off events. [2024-06-28 04:35:06,339 INFO L125 PetriNetUnfolderBase]: For 657498/657498 co-relation queries the response was YES. [2024-06-28 04:35:06,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57325 conditions, 7495 events. 4719/7495 cut-off events. For 657498/657498 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 47832 event pairs, 1296 based on Foata normal form. 2/7495 useless extension candidates. Maximal degree in co-relation 57173. Up to 7029 conditions per place. [2024-06-28 04:35:06,445 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 74 changer transitions 0/571 dead transitions. [2024-06-28 04:35:06,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 571 transitions, 8955 flow [2024-06-28 04:35:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:35:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:35:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:35:06,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 04:35:06,447 INFO L175 Difference]: Start difference. First operand has 326 places, 519 transitions, 7333 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:35:06,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 571 transitions, 8955 flow [2024-06-28 04:35:08,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 571 transitions, 8593 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-28 04:35:08,561 INFO L231 Difference]: Finished difference. Result has 329 places, 539 transitions, 7499 flow [2024-06-28 04:35:08,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6971, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7499, PETRI_PLACES=329, PETRI_TRANSITIONS=539} [2024-06-28 04:35:08,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-28 04:35:08,562 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 539 transitions, 7499 flow [2024-06-28 04:35:08,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:08,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:08,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:08,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:35:08,562 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:08,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1344490430, now seen corresponding path program 2 times [2024-06-28 04:35:08,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:08,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484666294] [2024-06-28 04:35:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:08,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:09,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:09,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484666294] [2024-06-28 04:35:09,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484666294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:09,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:09,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:09,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046359273] [2024-06-28 04:35:09,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:09,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:09,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:09,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:09,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 539 transitions, 7499 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:09,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:09,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:09,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:10,912 INFO L124 PetriNetUnfolderBase]: 4729/7504 cut-off events. [2024-06-28 04:35:10,913 INFO L125 PetriNetUnfolderBase]: For 668954/668957 co-relation queries the response was YES. [2024-06-28 04:35:10,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57859 conditions, 7504 events. 4729/7504 cut-off events. For 668954/668957 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 47748 event pairs, 1032 based on Foata normal form. 4/7502 useless extension candidates. Maximal degree in co-relation 57705. Up to 6829 conditions per place. [2024-06-28 04:35:11,023 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 122 changer transitions 0/581 dead transitions. [2024-06-28 04:35:11,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 581 transitions, 8994 flow [2024-06-28 04:35:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:35:11,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:35:11,024 INFO L175 Difference]: Start difference. First operand has 329 places, 539 transitions, 7499 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:35:11,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 581 transitions, 8994 flow [2024-06-28 04:35:12,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 581 transitions, 8785 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:12,737 INFO L231 Difference]: Finished difference. Result has 332 places, 551 transitions, 7735 flow [2024-06-28 04:35:12,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7735, PETRI_PLACES=332, PETRI_TRANSITIONS=551} [2024-06-28 04:35:12,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-28 04:35:12,738 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 551 transitions, 7735 flow [2024-06-28 04:35:12,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:12,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:12,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:12,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:35:12,739 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:12,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1167423456, now seen corresponding path program 3 times [2024-06-28 04:35:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:12,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028467628] [2024-06-28 04:35:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:13,358 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 04:35:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028467628] [2024-06-28 04:35:13,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028467628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:13,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174513753] [2024-06-28 04:35:13,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:13,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:13,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:13,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:13,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 551 transitions, 7735 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:13,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:13,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:13,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:15,078 INFO L124 PetriNetUnfolderBase]: 4739/7526 cut-off events. [2024-06-28 04:35:15,078 INFO L125 PetriNetUnfolderBase]: For 681236/681239 co-relation queries the response was YES. [2024-06-28 04:35:15,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58967 conditions, 7526 events. 4739/7526 cut-off events. For 681236/681239 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 47914 event pairs, 1038 based on Foata normal form. 4/7524 useless extension candidates. Maximal degree in co-relation 58811. Up to 6815 conditions per place. [2024-06-28 04:35:15,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 127 changer transitions 0/581 dead transitions. [2024-06-28 04:35:15,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 581 transitions, 9129 flow [2024-06-28 04:35:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:35:15,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:35:15,353 INFO L175 Difference]: Start difference. First operand has 332 places, 551 transitions, 7735 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:35:15,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 581 transitions, 9129 flow [2024-06-28 04:35:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 581 transitions, 8901 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-28 04:35:17,123 INFO L231 Difference]: Finished difference. Result has 336 places, 554 transitions, 7863 flow [2024-06-28 04:35:17,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7507, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7863, PETRI_PLACES=336, PETRI_TRANSITIONS=554} [2024-06-28 04:35:17,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-28 04:35:17,124 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 554 transitions, 7863 flow [2024-06-28 04:35:17,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:17,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:17,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:17,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:35:17,125 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:17,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1453115360, now seen corresponding path program 4 times [2024-06-28 04:35:17,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:17,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676243169] [2024-06-28 04:35:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:17,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:17,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676243169] [2024-06-28 04:35:17,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676243169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:17,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:17,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:17,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517791552] [2024-06-28 04:35:17,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:17,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:17,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 554 transitions, 7863 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:17,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:17,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:19,595 INFO L124 PetriNetUnfolderBase]: 4772/7579 cut-off events. [2024-06-28 04:35:19,596 INFO L125 PetriNetUnfolderBase]: For 703387/703387 co-relation queries the response was YES. [2024-06-28 04:35:19,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59966 conditions, 7579 events. 4772/7579 cut-off events. For 703387/703387 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 48282 event pairs, 1115 based on Foata normal form. 2/7573 useless extension candidates. Maximal degree in co-relation 59809. Up to 7141 conditions per place. [2024-06-28 04:35:19,708 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 520 selfloop transitions, 65 changer transitions 0/590 dead transitions. [2024-06-28 04:35:19,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 590 transitions, 9531 flow [2024-06-28 04:35:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:35:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:35:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-28 04:35:19,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 04:35:19,709 INFO L175 Difference]: Start difference. First operand has 336 places, 554 transitions, 7863 flow. Second operand 10 states and 168 transitions. [2024-06-28 04:35:19,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 590 transitions, 9531 flow [2024-06-28 04:35:22,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 590 transitions, 9189 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:22,510 INFO L231 Difference]: Finished difference. Result has 341 places, 566 transitions, 7921 flow [2024-06-28 04:35:22,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7529, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7921, PETRI_PLACES=341, PETRI_TRANSITIONS=566} [2024-06-28 04:35:22,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-28 04:35:22,511 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 566 transitions, 7921 flow [2024-06-28 04:35:22,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:22,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:22,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:22,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:35:22,511 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:22,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:22,512 INFO L85 PathProgramCache]: Analyzing trace with hash 939104288, now seen corresponding path program 5 times [2024-06-28 04:35:22,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:22,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386383082] [2024-06-28 04:35:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:22,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:23,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:23,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386383082] [2024-06-28 04:35:23,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386383082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:23,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:23,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613666256] [2024-06-28 04:35:23,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:23,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:23,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:23,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:23,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 566 transitions, 7921 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:23,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:23,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:23,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:25,014 INFO L124 PetriNetUnfolderBase]: 4782/7578 cut-off events. [2024-06-28 04:35:25,015 INFO L125 PetriNetUnfolderBase]: For 722564/722564 co-relation queries the response was YES. [2024-06-28 04:35:25,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60294 conditions, 7578 events. 4782/7578 cut-off events. For 722564/722564 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 48173 event pairs, 1271 based on Foata normal form. 2/7578 useless extension candidates. Maximal degree in co-relation 60135. Up to 7253 conditions per place. [2024-06-28 04:35:25,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 550 selfloop transitions, 30 changer transitions 0/585 dead transitions. [2024-06-28 04:35:25,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 585 transitions, 9249 flow [2024-06-28 04:35:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:35:25,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:35:25,131 INFO L175 Difference]: Start difference. First operand has 341 places, 566 transitions, 7921 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:35:25,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 585 transitions, 9249 flow [2024-06-28 04:35:27,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 585 transitions, 9087 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-28 04:35:27,501 INFO L231 Difference]: Finished difference. Result has 344 places, 569 transitions, 7934 flow [2024-06-28 04:35:27,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7759, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7934, PETRI_PLACES=344, PETRI_TRANSITIONS=569} [2024-06-28 04:35:27,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-28 04:35:27,501 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 569 transitions, 7934 flow [2024-06-28 04:35:27,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:27,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:27,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:27,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:35:27,502 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:27,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash 449145532, now seen corresponding path program 6 times [2024-06-28 04:35:27,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:27,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999486425] [2024-06-28 04:35:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:28,157 INFO 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 04:35:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999486425] [2024-06-28 04:35:28,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999486425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:28,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:28,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840521453] [2024-06-28 04:35:28,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:28,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:28,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:28,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:28,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 569 transitions, 7934 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:28,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:28,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:28,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:30,061 INFO L124 PetriNetUnfolderBase]: 4824/7643 cut-off events. [2024-06-28 04:35:30,061 INFO L125 PetriNetUnfolderBase]: For 758616/758619 co-relation queries the response was YES. [2024-06-28 04:35:30,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61881 conditions, 7643 events. 4824/7643 cut-off events. For 758616/758619 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48679 event pairs, 1068 based on Foata normal form. 4/7641 useless extension candidates. Maximal degree in co-relation 61720. Up to 6779 conditions per place. [2024-06-28 04:35:30,190 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 163 changer transitions 0/602 dead transitions. [2024-06-28 04:35:30,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 602 transitions, 9936 flow [2024-06-28 04:35:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:35:30,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:35:30,198 INFO L175 Difference]: Start difference. First operand has 344 places, 569 transitions, 7934 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:35:30,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 602 transitions, 9936 flow [2024-06-28 04:35:33,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 602 transitions, 9745 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:33,386 INFO L231 Difference]: Finished difference. Result has 346 places, 578 transitions, 8405 flow [2024-06-28 04:35:33,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8405, PETRI_PLACES=346, PETRI_TRANSITIONS=578} [2024-06-28 04:35:33,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-28 04:35:33,386 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 578 transitions, 8405 flow [2024-06-28 04:35:33,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:33,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:33,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:33,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:35:33,387 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:33,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash -419468798, now seen corresponding path program 1 times [2024-06-28 04:35:33,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:33,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771281543] [2024-06-28 04:35:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:33,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:34,070 INFO 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 04:35:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771281543] [2024-06-28 04:35:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771281543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:34,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:34,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716932657] [2024-06-28 04:35:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:34,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:34,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:34,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:34,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 578 transitions, 8405 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:34,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:34,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:34,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:35,930 INFO L124 PetriNetUnfolderBase]: 4850/7681 cut-off events. [2024-06-28 04:35:35,930 INFO L125 PetriNetUnfolderBase]: For 779083/779083 co-relation queries the response was YES. [2024-06-28 04:35:36,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62921 conditions, 7681 events. 4850/7681 cut-off events. For 779083/779083 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48867 event pairs, 1106 based on Foata normal form. 2/7675 useless extension candidates. Maximal degree in co-relation 62759. Up to 7299 conditions per place. [2024-06-28 04:35:36,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 560 selfloop transitions, 39 changer transitions 0/604 dead transitions. [2024-06-28 04:35:36,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 604 transitions, 9760 flow [2024-06-28 04:35:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:35:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:35:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:35:36,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 04:35:36,048 INFO L175 Difference]: Start difference. First operand has 346 places, 578 transitions, 8405 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:35:36,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 604 transitions, 9760 flow [2024-06-28 04:35:38,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 604 transitions, 9499 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-28 04:35:38,909 INFO L231 Difference]: Finished difference. Result has 353 places, 582 transitions, 8317 flow [2024-06-28 04:35:38,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8146, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8317, PETRI_PLACES=353, PETRI_TRANSITIONS=582} [2024-06-28 04:35:38,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-28 04:35:38,909 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 582 transitions, 8317 flow [2024-06-28 04:35:38,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:38,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:38,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:38,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:35:38,910 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:38,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1138453718, now seen corresponding path program 2 times [2024-06-28 04:35:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:38,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611523682] [2024-06-28 04:35:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:38,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:39,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:39,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611523682] [2024-06-28 04:35:39,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611523682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:39,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:39,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:39,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665273046] [2024-06-28 04:35:39,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:39,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:39,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:39,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 582 transitions, 8317 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:39,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:39,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:39,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:41,577 INFO L124 PetriNetUnfolderBase]: 4858/7698 cut-off events. [2024-06-28 04:35:41,577 INFO L125 PetriNetUnfolderBase]: For 786640/786640 co-relation queries the response was YES. [2024-06-28 04:35:41,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62869 conditions, 7698 events. 4858/7698 cut-off events. For 786640/786640 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 49168 event pairs, 1264 based on Foata normal form. 2/7698 useless extension candidates. Maximal degree in co-relation 62704. Up to 7325 conditions per place. [2024-06-28 04:35:41,688 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 557 selfloop transitions, 43 changer transitions 0/605 dead transitions. [2024-06-28 04:35:41,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 605 transitions, 9669 flow [2024-06-28 04:35:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 04:35:41,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 04:35:41,689 INFO L175 Difference]: Start difference. First operand has 353 places, 582 transitions, 8317 flow. Second operand 8 states and 137 transitions. [2024-06-28 04:35:41,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 605 transitions, 9669 flow [2024-06-28 04:35:45,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 605 transitions, 9550 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 04:35:45,309 INFO L231 Difference]: Finished difference. Result has 356 places, 584 transitions, 8362 flow [2024-06-28 04:35:45,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8198, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8362, PETRI_PLACES=356, PETRI_TRANSITIONS=584} [2024-06-28 04:35:45,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-28 04:35:45,310 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 584 transitions, 8362 flow [2024-06-28 04:35:45,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:45,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:45,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:45,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:35:45,311 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:45,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:45,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1253765930, now seen corresponding path program 3 times [2024-06-28 04:35:45,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:45,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835062867] [2024-06-28 04:35:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:45,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:35:46,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:46,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835062867] [2024-06-28 04:35:46,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835062867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:46,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:46,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:46,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525954036] [2024-06-28 04:35:46,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:46,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:46,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:46,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:46,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:46,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:46,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 584 transitions, 8362 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:46,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:46,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:46,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:48,071 INFO L124 PetriNetUnfolderBase]: 4866/7708 cut-off events. [2024-06-28 04:35:48,071 INFO L125 PetriNetUnfolderBase]: For 803497/803497 co-relation queries the response was YES. [2024-06-28 04:35:48,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63221 conditions, 7708 events. 4866/7708 cut-off events. For 803497/803497 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49143 event pairs, 1272 based on Foata normal form. 2/7708 useless extension candidates. Maximal degree in co-relation 63055. Up to 7377 conditions per place. [2024-06-28 04:35:48,178 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 568 selfloop transitions, 29 changer transitions 0/602 dead transitions. [2024-06-28 04:35:48,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 602 transitions, 9688 flow [2024-06-28 04:35:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 04:35:48,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 04:35:48,180 INFO L175 Difference]: Start difference. First operand has 356 places, 584 transitions, 8362 flow. Second operand 8 states and 131 transitions. [2024-06-28 04:35:48,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 602 transitions, 9688 flow [2024-06-28 04:35:50,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 602 transitions, 9542 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:50,615 INFO L231 Difference]: Finished difference. Result has 358 places, 586 transitions, 8356 flow [2024-06-28 04:35:50,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8216, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8356, PETRI_PLACES=358, PETRI_TRANSITIONS=586} [2024-06-28 04:35:50,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-28 04:35:50,616 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 586 transitions, 8356 flow [2024-06-28 04:35:50,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:50,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:50,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:50,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:35:50,617 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:50,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1138441814, now seen corresponding path program 1 times [2024-06-28 04:35:50,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:50,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967232540] [2024-06-28 04:35:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:51,327 INFO 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 04:35:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967232540] [2024-06-28 04:35:51,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967232540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:51,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:51,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:51,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940598659] [2024-06-28 04:35:51,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:51,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:51,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 586 transitions, 8356 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:51,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:51,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:51,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:35:53,446 INFO L124 PetriNetUnfolderBase]: 4909/7764 cut-off events. [2024-06-28 04:35:53,446 INFO L125 PetriNetUnfolderBase]: For 836321/836321 co-relation queries the response was YES. [2024-06-28 04:35:53,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64302 conditions, 7764 events. 4909/7764 cut-off events. For 836321/836321 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 49377 event pairs, 1007 based on Foata normal form. 3/7753 useless extension candidates. Maximal degree in co-relation 64135. Up to 6793 conditions per place. [2024-06-28 04:35:53,544 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 208 changer transitions 0/617 dead transitions. [2024-06-28 04:35:53,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 617 transitions, 10362 flow [2024-06-28 04:35:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:35:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:35:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 04:35:53,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:35:53,546 INFO L175 Difference]: Start difference. First operand has 358 places, 586 transitions, 8356 flow. Second operand 8 states and 148 transitions. [2024-06-28 04:35:53,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 617 transitions, 10362 flow [2024-06-28 04:35:57,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 617 transitions, 10240 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 04:35:57,240 INFO L231 Difference]: Finished difference. Result has 362 places, 596 transitions, 9162 flow [2024-06-28 04:35:57,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8234, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9162, PETRI_PLACES=362, PETRI_TRANSITIONS=596} [2024-06-28 04:35:57,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-28 04:35:57,241 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 596 transitions, 9162 flow [2024-06-28 04:35:57,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:57,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:35:57,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:35:57,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:35:57,242 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:35:57,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:35:57,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1970336256, now seen corresponding path program 2 times [2024-06-28 04:35:57,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:35:57,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574163152] [2024-06-28 04:35:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:35:57,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:35:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:35:58,067 INFO 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 04:35:58,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:35:58,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574163152] [2024-06-28 04:35:58,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574163152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:35:58,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:35:58,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:35:58,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633256058] [2024-06-28 04:35:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:35:58,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:35:58,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:35:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:35:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:35:58,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:35:58,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 596 transitions, 9162 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:35:58,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:35:58,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:35:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:00,034 INFO L124 PetriNetUnfolderBase]: 4956/7833 cut-off events. [2024-06-28 04:36:00,035 INFO L125 PetriNetUnfolderBase]: For 879204/879207 co-relation queries the response was YES. [2024-06-28 04:36:00,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67075 conditions, 7833 events. 4956/7833 cut-off events. For 879204/879207 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 49867 event pairs, 1093 based on Foata normal form. 5/7805 useless extension candidates. Maximal degree in co-relation 66905. Up to 6528 conditions per place. [2024-06-28 04:36:00,350 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 383 selfloop transitions, 243 changer transitions 0/631 dead transitions. [2024-06-28 04:36:00,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 631 transitions, 11530 flow [2024-06-28 04:36:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 04:36:00,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 04:36:00,351 INFO L175 Difference]: Start difference. First operand has 362 places, 596 transitions, 9162 flow. Second operand 8 states and 147 transitions. [2024-06-28 04:36:00,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 631 transitions, 11530 flow [2024-06-28 04:36:03,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 631 transitions, 11329 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-28 04:36:03,757 INFO L231 Difference]: Finished difference. Result has 368 places, 610 transitions, 10046 flow [2024-06-28 04:36:03,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8961, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10046, PETRI_PLACES=368, PETRI_TRANSITIONS=610} [2024-06-28 04:36:03,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-28 04:36:03,758 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 610 transitions, 10046 flow [2024-06-28 04:36:03,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:03,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:03,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:36:03,758 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:03,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1662930554, now seen corresponding path program 1 times [2024-06-28 04:36:03,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:03,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514109851] [2024-06-28 04:36:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:04,679 INFO 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 04:36:04,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:04,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514109851] [2024-06-28 04:36:04,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514109851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:04,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:04,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:04,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934686770] [2024-06-28 04:36:04,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:04,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:04,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:04,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:04,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 610 transitions, 10046 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:04,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:04,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:04,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:06,946 INFO L124 PetriNetUnfolderBase]: 4966/7871 cut-off events. [2024-06-28 04:36:06,946 INFO L125 PetriNetUnfolderBase]: For 898690/898690 co-relation queries the response was YES. [2024-06-28 04:36:07,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68806 conditions, 7871 events. 4966/7871 cut-off events. For 898690/898690 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 50317 event pairs, 1129 based on Foata normal form. 2/7866 useless extension candidates. Maximal degree in co-relation 68633. Up to 7269 conditions per place. [2024-06-28 04:36:07,052 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 567 selfloop transitions, 69 changer transitions 0/641 dead transitions. [2024-06-28 04:36:07,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 641 transitions, 11516 flow [2024-06-28 04:36:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 04:36:07,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:36:07,053 INFO L175 Difference]: Start difference. First operand has 368 places, 610 transitions, 10046 flow. Second operand 8 states and 148 transitions. [2024-06-28 04:36:07,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 641 transitions, 11516 flow [2024-06-28 04:36:10,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 641 transitions, 11243 flow, removed 86 selfloop flow, removed 2 redundant places. [2024-06-28 04:36:10,624 INFO L231 Difference]: Finished difference. Result has 374 places, 613 transitions, 9989 flow [2024-06-28 04:36:10,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9773, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9989, PETRI_PLACES=374, PETRI_TRANSITIONS=613} [2024-06-28 04:36:10,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-28 04:36:10,627 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 613 transitions, 9989 flow [2024-06-28 04:36:10,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:10,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:10,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:10,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 04:36:10,627 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:10,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1172058142, now seen corresponding path program 2 times [2024-06-28 04:36:10,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:10,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516000760] [2024-06-28 04:36:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:11,420 INFO 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 04:36:11,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516000760] [2024-06-28 04:36:11,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516000760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:11,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:11,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:11,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603975402] [2024-06-28 04:36:11,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:11,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:11,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:11,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:11,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 613 transitions, 9989 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:11,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:11,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:11,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:13,790 INFO L124 PetriNetUnfolderBase]: 4976/7884 cut-off events. [2024-06-28 04:36:13,791 INFO L125 PetriNetUnfolderBase]: For 906231/906231 co-relation queries the response was YES. [2024-06-28 04:36:13,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68647 conditions, 7884 events. 4976/7884 cut-off events. For 906231/906231 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 50383 event pairs, 1134 based on Foata normal form. 2/7879 useless extension candidates. Maximal degree in co-relation 68472. Up to 7254 conditions per place. [2024-06-28 04:36:13,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 562 selfloop transitions, 75 changer transitions 0/642 dead transitions. [2024-06-28 04:36:13,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 642 transitions, 11442 flow [2024-06-28 04:36:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:36:13,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:36:13,907 INFO L175 Difference]: Start difference. First operand has 374 places, 613 transitions, 9989 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:36:13,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 642 transitions, 11442 flow [2024-06-28 04:36:17,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 642 transitions, 11277 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:36:17,893 INFO L231 Difference]: Finished difference. Result has 376 places, 616 transitions, 10050 flow [2024-06-28 04:36:17,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9824, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10050, PETRI_PLACES=376, PETRI_TRANSITIONS=616} [2024-06-28 04:36:17,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-28 04:36:17,894 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 616 transitions, 10050 flow [2024-06-28 04:36:17,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:17,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:17,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:17,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 04:36:17,895 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:17,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash 943872832, now seen corresponding path program 3 times [2024-06-28 04:36:17,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:17,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648492404] [2024-06-28 04:36:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:17,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:18,792 INFO 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 04:36:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648492404] [2024-06-28 04:36:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648492404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:36:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304427770] [2024-06-28 04:36:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:36:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:36:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:36:18,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:18,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 616 transitions, 10050 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:18,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:18,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:18,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:21,065 INFO L124 PetriNetUnfolderBase]: 5018/7951 cut-off events. [2024-06-28 04:36:21,066 INFO L125 PetriNetUnfolderBase]: For 944456/944456 co-relation queries the response was YES. [2024-06-28 04:36:21,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69752 conditions, 7951 events. 5018/7951 cut-off events. For 944456/944456 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 50839 event pairs, 1148 based on Foata normal form. 2/7946 useless extension candidates. Maximal degree in co-relation 69576. Up to 7243 conditions per place. [2024-06-28 04:36:21,179 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 552 selfloop transitions, 91 changer transitions 0/648 dead transitions. [2024-06-28 04:36:21,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 648 transitions, 11830 flow [2024-06-28 04:36:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:36:21,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:36:21,180 INFO L175 Difference]: Start difference. First operand has 376 places, 616 transitions, 10050 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:36:21,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 648 transitions, 11830 flow [2024-06-28 04:36:24,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 648 transitions, 11651 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 04:36:24,972 INFO L231 Difference]: Finished difference. Result has 379 places, 625 transitions, 10326 flow [2024-06-28 04:36:24,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9871, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10326, PETRI_PLACES=379, PETRI_TRANSITIONS=625} [2024-06-28 04:36:24,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-28 04:36:24,973 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 625 transitions, 10326 flow [2024-06-28 04:36:24,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:24,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:24,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:24,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 04:36:24,973 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:24,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:24,974 INFO L85 PathProgramCache]: Analyzing trace with hash -769175586, now seen corresponding path program 7 times [2024-06-28 04:36:24,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:24,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470297033] [2024-06-28 04:36:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:24,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:25,525 INFO 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 04:36:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470297033] [2024-06-28 04:36:25,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470297033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:25,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:25,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:25,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539318520] [2024-06-28 04:36:25,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:25,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:25,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:25,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 625 transitions, 10326 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:25,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:25,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:25,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:27,806 INFO L124 PetriNetUnfolderBase]: 5028/7954 cut-off events. [2024-06-28 04:36:27,806 INFO L125 PetriNetUnfolderBase]: For 963741/963744 co-relation queries the response was YES. [2024-06-28 04:36:27,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70299 conditions, 7954 events. 5028/7954 cut-off events. For 963741/963744 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50837 event pairs, 1089 based on Foata normal form. 4/7933 useless extension candidates. Maximal degree in co-relation 70121. Up to 7256 conditions per place. [2024-06-28 04:36:27,914 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 529 selfloop transitions, 126 changer transitions 0/660 dead transitions. [2024-06-28 04:36:27,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 660 transitions, 11954 flow [2024-06-28 04:36:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:27,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 04:36:27,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:36:27,917 INFO L175 Difference]: Start difference. First operand has 379 places, 625 transitions, 10326 flow. Second operand 8 states and 140 transitions. [2024-06-28 04:36:27,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 660 transitions, 11954 flow [2024-06-28 04:36:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 660 transitions, 11795 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 04:36:31,270 INFO L231 Difference]: Finished difference. Result has 384 places, 633 transitions, 10607 flow [2024-06-28 04:36:31,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10167, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10607, PETRI_PLACES=384, PETRI_TRANSITIONS=633} [2024-06-28 04:36:31,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-28 04:36:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 633 transitions, 10607 flow [2024-06-28 04:36:31,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:31,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:31,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:31,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 04:36:31,271 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:31,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash 557072416, now seen corresponding path program 8 times [2024-06-28 04:36:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:31,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362074019] [2024-06-28 04:36:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:31,888 INFO 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 04:36:31,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:31,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362074019] [2024-06-28 04:36:31,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362074019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:31,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:31,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:31,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420632240] [2024-06-28 04:36:31,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:31,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:31,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:31,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:31,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 633 transitions, 10607 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:31,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:31,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:31,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:34,166 INFO L124 PetriNetUnfolderBase]: 5030/7964 cut-off events. [2024-06-28 04:36:34,166 INFO L125 PetriNetUnfolderBase]: For 978748/978751 co-relation queries the response was YES. [2024-06-28 04:36:34,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70897 conditions, 7964 events. 5030/7964 cut-off events. For 978748/978751 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 50943 event pairs, 1095 based on Foata normal form. 4/7938 useless extension candidates. Maximal degree in co-relation 70717. Up to 7251 conditions per place. [2024-06-28 04:36:34,277 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 528 selfloop transitions, 128 changer transitions 0/661 dead transitions. [2024-06-28 04:36:34,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 661 transitions, 12182 flow [2024-06-28 04:36:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:34,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 04:36:34,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 04:36:34,278 INFO L175 Difference]: Start difference. First operand has 384 places, 633 transitions, 10607 flow. Second operand 8 states and 139 transitions. [2024-06-28 04:36:34,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 661 transitions, 12182 flow [2024-06-28 04:36:38,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 661 transitions, 11928 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-28 04:36:38,773 INFO L231 Difference]: Finished difference. Result has 388 places, 636 transitions, 10738 flow [2024-06-28 04:36:38,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10353, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10738, PETRI_PLACES=388, PETRI_TRANSITIONS=636} [2024-06-28 04:36:38,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-28 04:36:38,774 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 636 transitions, 10738 flow [2024-06-28 04:36:38,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:38,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:38,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 04:36:38,775 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:38,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash 484683808, now seen corresponding path program 9 times [2024-06-28 04:36:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:38,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679229019] [2024-06-28 04:36:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:36:39,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679229019] [2024-06-28 04:36:39,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679229019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:39,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:39,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:39,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139998500] [2024-06-28 04:36:39,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:39,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:39,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:39,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:39,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:39,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:39,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 636 transitions, 10738 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:39,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:39,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:39,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:41,571 INFO L124 PetriNetUnfolderBase]: 5082/8032 cut-off events. [2024-06-28 04:36:41,572 INFO L125 PetriNetUnfolderBase]: For 1030818/1030821 co-relation queries the response was YES. [2024-06-28 04:36:41,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72279 conditions, 8032 events. 5082/8032 cut-off events. For 1030818/1030821 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 51328 event pairs, 1091 based on Foata normal form. 6/8008 useless extension candidates. Maximal degree in co-relation 72097. Up to 7165 conditions per place. [2024-06-28 04:36:41,701 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 514 selfloop transitions, 151 changer transitions 0/670 dead transitions. [2024-06-28 04:36:41,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 670 transitions, 12705 flow [2024-06-28 04:36:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:36:41,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:36:41,702 INFO L175 Difference]: Start difference. First operand has 388 places, 636 transitions, 10738 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:36:41,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 670 transitions, 12705 flow [2024-06-28 04:36:46,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 670 transitions, 12363 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 04:36:46,740 INFO L231 Difference]: Finished difference. Result has 392 places, 646 transitions, 11058 flow [2024-06-28 04:36:46,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10396, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11058, PETRI_PLACES=392, PETRI_TRANSITIONS=646} [2024-06-28 04:36:46,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-28 04:36:46,741 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 646 transitions, 11058 flow [2024-06-28 04:36:46,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:46,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:46,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:46,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 04:36:46,742 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:46,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:46,742 INFO L85 PathProgramCache]: Analyzing trace with hash 97890336, now seen corresponding path program 10 times [2024-06-28 04:36:46,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:46,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640453752] [2024-06-28 04:36:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:46,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:47,457 INFO 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 04:36:47,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:47,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640453752] [2024-06-28 04:36:47,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640453752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:47,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:47,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:47,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479503721] [2024-06-28 04:36:47,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:47,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:47,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:47,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:47,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 646 transitions, 11058 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:47,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:47,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:47,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:49,702 INFO L124 PetriNetUnfolderBase]: 5176/8181 cut-off events. [2024-06-28 04:36:49,702 INFO L125 PetriNetUnfolderBase]: For 1113573/1113576 co-relation queries the response was YES. [2024-06-28 04:36:49,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75112 conditions, 8181 events. 5176/8181 cut-off events. For 1113573/1113576 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 52520 event pairs, 1121 based on Foata normal form. 8/8157 useless extension candidates. Maximal degree in co-relation 74928. Up to 6600 conditions per place. [2024-06-28 04:36:49,845 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 255 changer transitions 0/687 dead transitions. [2024-06-28 04:36:49,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 687 transitions, 13824 flow [2024-06-28 04:36:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:36:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:36:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:36:49,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 04:36:49,847 INFO L175 Difference]: Start difference. First operand has 392 places, 646 transitions, 11058 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:36:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 687 transitions, 13824 flow [2024-06-28 04:36:53,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 687 transitions, 13452 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-28 04:36:53,622 INFO L231 Difference]: Finished difference. Result has 396 places, 667 transitions, 11949 flow [2024-06-28 04:36:53,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11949, PETRI_PLACES=396, PETRI_TRANSITIONS=667} [2024-06-28 04:36:53,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-28 04:36:53,623 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 667 transitions, 11949 flow [2024-06-28 04:36:53,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:53,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:36:53,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:36:53,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 04:36:53,624 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:36:53,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:36:53,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1981100900, now seen corresponding path program 11 times [2024-06-28 04:36:53,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:36:53,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504063691] [2024-06-28 04:36:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:36:53,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:36:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:36:54,316 INFO 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 04:36:54,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:36:54,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504063691] [2024-06-28 04:36:54,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504063691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:36:54,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:36:54,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:36:54,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453958712] [2024-06-28 04:36:54,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:36:54,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:36:54,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:36:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:36:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:36:54,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:36:54,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 667 transitions, 11949 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:36:54,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:36:54,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:36:54,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:36:56,540 INFO L124 PetriNetUnfolderBase]: 5190/8201 cut-off events. [2024-06-28 04:36:56,540 INFO L125 PetriNetUnfolderBase]: For 1125960/1125960 co-relation queries the response was YES. [2024-06-28 04:36:56,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75959 conditions, 8201 events. 5190/8201 cut-off events. For 1125960/1125960 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 52679 event pairs, 1295 based on Foata normal form. 6/8200 useless extension candidates. Maximal degree in co-relation 75773. Up to 7769 conditions per place. [2024-06-28 04:36:56,669 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 633 selfloop transitions, 49 changer transitions 0/687 dead transitions. [2024-06-28 04:36:56,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 687 transitions, 13778 flow [2024-06-28 04:36:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:36:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:36:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 04:36:56,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-28 04:36:56,671 INFO L175 Difference]: Start difference. First operand has 396 places, 667 transitions, 11949 flow. Second operand 9 states and 150 transitions. [2024-06-28 04:36:56,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 687 transitions, 13778 flow [2024-06-28 04:37:00,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 687 transitions, 13383 flow, removed 145 selfloop flow, removed 2 redundant places. [2024-06-28 04:37:00,808 INFO L231 Difference]: Finished difference. Result has 404 places, 673 transitions, 11882 flow [2024-06-28 04:37:00,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11584, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11882, PETRI_PLACES=404, PETRI_TRANSITIONS=673} [2024-06-28 04:37:00,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-28 04:37:00,809 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 673 transitions, 11882 flow [2024-06-28 04:37:00,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:00,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:00,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:00,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 04:37:00,810 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:00,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:00,810 INFO L85 PathProgramCache]: Analyzing trace with hash -37316094, now seen corresponding path program 12 times [2024-06-28 04:37:00,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:00,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672740861] [2024-06-28 04:37:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:00,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:01,415 INFO 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 04:37:01,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:01,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672740861] [2024-06-28 04:37:01,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672740861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:01,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:01,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:37:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910087837] [2024-06-28 04:37:01,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:01,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:37:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:37:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:37:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:01,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 673 transitions, 11882 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:03,620 INFO L124 PetriNetUnfolderBase]: 5228/8261 cut-off events. [2024-06-28 04:37:03,620 INFO L125 PetriNetUnfolderBase]: For 1150329/1150332 co-relation queries the response was YES. [2024-06-28 04:37:03,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76597 conditions, 8261 events. 5228/8261 cut-off events. For 1150329/1150332 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 53139 event pairs, 1119 based on Foata normal form. 8/8236 useless extension candidates. Maximal degree in co-relation 76408. Up to 6650 conditions per place. [2024-06-28 04:37:03,742 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 431 selfloop transitions, 269 changer transitions 0/705 dead transitions. [2024-06-28 04:37:03,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 705 transitions, 14220 flow [2024-06-28 04:37:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:37:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:37:03,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 04:37:03,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:37:03,743 INFO L175 Difference]: Start difference. First operand has 404 places, 673 transitions, 11882 flow. Second operand 8 states and 148 transitions. [2024-06-28 04:37:03,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 705 transitions, 14220 flow [2024-06-28 04:37:07,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 705 transitions, 13856 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-28 04:37:07,484 INFO L231 Difference]: Finished difference. Result has 406 places, 686 transitions, 12559 flow [2024-06-28 04:37:07,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11518, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12559, PETRI_PLACES=406, PETRI_TRANSITIONS=686} [2024-06-28 04:37:07,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-28 04:37:07,485 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 686 transitions, 12559 flow [2024-06-28 04:37:07,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:07,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:07,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:07,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 04:37:07,485 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:07,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash 93125760, now seen corresponding path program 4 times [2024-06-28 04:37:07,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:07,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178518815] [2024-06-28 04:37:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:07,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:08,291 INFO 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 04:37:08,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:08,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178518815] [2024-06-28 04:37:08,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178518815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:08,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:08,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:37:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269758943] [2024-06-28 04:37:08,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:37:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:37:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:37:08,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:08,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 686 transitions, 12559 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:08,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:08,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:08,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:10,526 INFO L124 PetriNetUnfolderBase]: 5244/8288 cut-off events. [2024-06-28 04:37:10,527 INFO L125 PetriNetUnfolderBase]: For 1159678/1159678 co-relation queries the response was YES. [2024-06-28 04:37:10,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77616 conditions, 8288 events. 5244/8288 cut-off events. For 1159678/1159678 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 53366 event pairs, 1348 based on Foata normal form. 4/8285 useless extension candidates. Maximal degree in co-relation 77426. Up to 7866 conditions per place. [2024-06-28 04:37:10,657 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 656 selfloop transitions, 39 changer transitions 0/700 dead transitions. [2024-06-28 04:37:10,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 700 transitions, 14077 flow [2024-06-28 04:37:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:37:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:37:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 04:37:10,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:37:10,659 INFO L175 Difference]: Start difference. First operand has 406 places, 686 transitions, 12559 flow. Second operand 8 states and 132 transitions. [2024-06-28 04:37:10,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 700 transitions, 14077 flow [2024-06-28 04:37:16,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 700 transitions, 13582 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-28 04:37:16,050 INFO L231 Difference]: Finished difference. Result has 410 places, 689 transitions, 12246 flow [2024-06-28 04:37:16,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12064, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12246, PETRI_PLACES=410, PETRI_TRANSITIONS=689} [2024-06-28 04:37:16,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-28 04:37:16,051 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 689 transitions, 12246 flow [2024-06-28 04:37:16,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:16,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:16,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:16,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 04:37:16,051 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:16,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1379145186, now seen corresponding path program 3 times [2024-06-28 04:37:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:16,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374692067] [2024-06-28 04:37:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:16,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:16,739 INFO 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 04:37:16,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:16,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374692067] [2024-06-28 04:37:16,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374692067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:16,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:16,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:37:16,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94291696] [2024-06-28 04:37:16,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:16,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:37:16,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:37:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:37:16,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:16,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 689 transitions, 12246 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:16,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:16,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:16,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:19,051 INFO L124 PetriNetUnfolderBase]: 5275/8338 cut-off events. [2024-06-28 04:37:19,052 INFO L125 PetriNetUnfolderBase]: For 1180248/1180251 co-relation queries the response was YES. [2024-06-28 04:37:19,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77698 conditions, 8338 events. 5275/8338 cut-off events. For 1180248/1180251 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 53644 event pairs, 1125 based on Foata normal form. 5/8310 useless extension candidates. Maximal degree in co-relation 77507. Up to 6950 conditions per place. [2024-06-28 04:37:19,191 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 469 selfloop transitions, 242 changer transitions 0/716 dead transitions. [2024-06-28 04:37:19,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 716 transitions, 14652 flow [2024-06-28 04:37:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:37:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:37:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:37:19,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:37:19,193 INFO L175 Difference]: Start difference. First operand has 410 places, 689 transitions, 12246 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:37:19,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 716 transitions, 14652 flow [2024-06-28 04:37:24,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 716 transitions, 14492 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 04:37:24,691 INFO L231 Difference]: Finished difference. Result has 412 places, 696 transitions, 12822 flow [2024-06-28 04:37:24,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12086, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12822, PETRI_PLACES=412, PETRI_TRANSITIONS=696} [2024-06-28 04:37:24,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-28 04:37:24,692 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 696 transitions, 12822 flow [2024-06-28 04:37:24,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:24,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:24,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:24,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 04:37:24,692 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:24,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:24,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1864440576, now seen corresponding path program 4 times [2024-06-28 04:37:24,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:24,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064080414] [2024-06-28 04:37:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:25,461 INFO 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 04:37:25,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064080414] [2024-06-28 04:37:25,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064080414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:25,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:25,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:37:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536543553] [2024-06-28 04:37:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:37:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:37:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:37:25,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:25,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 696 transitions, 12822 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:25,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:25,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:25,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:27,702 INFO L124 PetriNetUnfolderBase]: 5272/8347 cut-off events. [2024-06-28 04:37:27,702 INFO L125 PetriNetUnfolderBase]: For 1183910/1183910 co-relation queries the response was YES. [2024-06-28 04:37:27,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78250 conditions, 8347 events. 5272/8347 cut-off events. For 1183910/1183910 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 53857 event pairs, 1318 based on Foata normal form. 1/8341 useless extension candidates. Maximal degree in co-relation 78058. Up to 7890 conditions per place. [2024-06-28 04:37:27,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 649 selfloop transitions, 60 changer transitions 0/714 dead transitions. [2024-06-28 04:37:27,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 714 transitions, 14416 flow [2024-06-28 04:37:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:37:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:37:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-28 04:37:27,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:37:27,836 INFO L175 Difference]: Start difference. First operand has 412 places, 696 transitions, 12822 flow. Second operand 10 states and 160 transitions. [2024-06-28 04:37:27,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 714 transitions, 14416 flow [2024-06-28 04:37:33,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 714 transitions, 13820 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-28 04:37:33,626 INFO L231 Difference]: Finished difference. Result has 419 places, 702 transitions, 12517 flow [2024-06-28 04:37:33,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12274, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12517, PETRI_PLACES=419, PETRI_TRANSITIONS=702} [2024-06-28 04:37:33,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-28 04:37:33,627 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 702 transitions, 12517 flow [2024-06-28 04:37:33,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:33,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:33,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 04:37:33,627 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:33,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1234008892, now seen corresponding path program 4 times [2024-06-28 04:37:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037256696] [2024-06-28 04:37:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037256696] [2024-06-28 04:37:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037256696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:34,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:34,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662971852] [2024-06-28 04:37:34,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:34,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:34,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:34,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:34,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 702 transitions, 12517 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:34,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:34,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:34,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:37,005 INFO L124 PetriNetUnfolderBase]: 5282/8354 cut-off events. [2024-06-28 04:37:37,006 INFO L125 PetriNetUnfolderBase]: For 1202875/1202875 co-relation queries the response was YES. [2024-06-28 04:37:37,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78273 conditions, 8354 events. 5282/8354 cut-off events. For 1202875/1202875 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 53825 event pairs, 1193 based on Foata normal form. 2/8349 useless extension candidates. Maximal degree in co-relation 78078. Up to 7718 conditions per place. [2024-06-28 04:37:37,146 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 658 selfloop transitions, 66 changer transitions 0/729 dead transitions. [2024-06-28 04:37:37,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 729 transitions, 14145 flow [2024-06-28 04:37:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:37:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:37:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:37:37,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:37:37,148 INFO L175 Difference]: Start difference. First operand has 419 places, 702 transitions, 12517 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:37:37,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 729 transitions, 14145 flow [2024-06-28 04:37:41,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 729 transitions, 13968 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 04:37:41,275 INFO L231 Difference]: Finished difference. Result has 420 places, 705 transitions, 12560 flow [2024-06-28 04:37:41,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12340, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12560, PETRI_PLACES=420, PETRI_TRANSITIONS=705} [2024-06-28 04:37:41,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-28 04:37:41,276 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 705 transitions, 12560 flow [2024-06-28 04:37:41,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:41,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:41,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 04:37:41,277 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:41,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1827308258, now seen corresponding path program 5 times [2024-06-28 04:37:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:41,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23624824] [2024-06-28 04:37:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:42,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23624824] [2024-06-28 04:37:42,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23624824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:42,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:42,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773514540] [2024-06-28 04:37:42,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:42,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:42,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:42,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:42,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 705 transitions, 12560 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:42,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:42,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:42,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:44,428 INFO L124 PetriNetUnfolderBase]: 5276/8332 cut-off events. [2024-06-28 04:37:44,428 INFO L125 PetriNetUnfolderBase]: For 1212903/1212903 co-relation queries the response was YES. [2024-06-28 04:37:44,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78265 conditions, 8332 events. 5276/8332 cut-off events. For 1212903/1212903 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 53607 event pairs, 1195 based on Foata normal form. 2/8327 useless extension candidates. Maximal degree in co-relation 78069. Up to 7674 conditions per place. [2024-06-28 04:37:44,565 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 646 selfloop transitions, 77 changer transitions 0/728 dead transitions. [2024-06-28 04:37:44,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 728 transitions, 14326 flow [2024-06-28 04:37:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:37:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:37:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:37:44,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:37:44,566 INFO L175 Difference]: Start difference. First operand has 420 places, 705 transitions, 12560 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:37:44,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 728 transitions, 14326 flow [2024-06-28 04:37:49,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 728 transitions, 14159 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:37:49,477 INFO L231 Difference]: Finished difference. Result has 422 places, 705 transitions, 12554 flow [2024-06-28 04:37:49,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12393, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12554, PETRI_PLACES=422, PETRI_TRANSITIONS=705} [2024-06-28 04:37:49,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-28 04:37:49,478 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 705 transitions, 12554 flow [2024-06-28 04:37:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:49,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:49,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 04:37:49,478 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:49,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 198998848, now seen corresponding path program 6 times [2024-06-28 04:37:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635192473] [2024-06-28 04:37:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:49,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:50,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635192473] [2024-06-28 04:37:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635192473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:50,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:50,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:50,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051575908] [2024-06-28 04:37:50,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:50,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:50,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:50,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 705 transitions, 12554 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:50,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:50,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:50,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:37:52,644 INFO L124 PetriNetUnfolderBase]: 5270/8332 cut-off events. [2024-06-28 04:37:52,644 INFO L125 PetriNetUnfolderBase]: For 1220311/1220311 co-relation queries the response was YES. [2024-06-28 04:37:52,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78136 conditions, 8332 events. 5270/8332 cut-off events. For 1220311/1220311 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 53616 event pairs, 1178 based on Foata normal form. 2/8327 useless extension candidates. Maximal degree in co-relation 77939. Up to 7702 conditions per place. [2024-06-28 04:37:52,780 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 657 selfloop transitions, 67 changer transitions 0/729 dead transitions. [2024-06-28 04:37:52,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 729 transitions, 14117 flow [2024-06-28 04:37:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:37:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:37:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:37:52,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 04:37:52,781 INFO L175 Difference]: Start difference. First operand has 422 places, 705 transitions, 12554 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:37:52,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 729 transitions, 14117 flow [2024-06-28 04:37:58,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 729 transitions, 13857 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 04:37:58,102 INFO L231 Difference]: Finished difference. Result has 424 places, 705 transitions, 12435 flow [2024-06-28 04:37:58,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12294, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12435, PETRI_PLACES=424, PETRI_TRANSITIONS=705} [2024-06-28 04:37:58,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-28 04:37:58,103 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 705 transitions, 12435 flow [2024-06-28 04:37:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:58,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:37:58,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:37:58,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 04:37:58,103 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:37:58,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:37:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash 212331328, now seen corresponding path program 7 times [2024-06-28 04:37:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:37:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721620673] [2024-06-28 04:37:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:37:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:37:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:37:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:37:59,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:37:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721620673] [2024-06-28 04:37:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721620673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:37:59,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:37:59,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:37:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956357641] [2024-06-28 04:37:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:37:59,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:37:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:37:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:37:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:37:59,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:37:59,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 705 transitions, 12435 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:37:59,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:37:59,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:37:59,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:01,233 INFO L124 PetriNetUnfolderBase]: 5254/8312 cut-off events. [2024-06-28 04:38:01,233 INFO L125 PetriNetUnfolderBase]: For 1226493/1226493 co-relation queries the response was YES. [2024-06-28 04:38:01,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77535 conditions, 8312 events. 5254/8312 cut-off events. For 1226493/1226493 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 53465 event pairs, 1186 based on Foata normal form. 4/8309 useless extension candidates. Maximal degree in co-relation 77337. Up to 7596 conditions per place. [2024-06-28 04:38:01,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 642 selfloop transitions, 79 changer transitions 0/726 dead transitions. [2024-06-28 04:38:01,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 726 transitions, 13975 flow [2024-06-28 04:38:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:38:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:38:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 04:38:01,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 04:38:01,387 INFO L175 Difference]: Start difference. First operand has 424 places, 705 transitions, 12435 flow. Second operand 8 states and 141 transitions. [2024-06-28 04:38:01,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 726 transitions, 13975 flow [2024-06-28 04:38:07,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 726 transitions, 13788 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 04:38:07,204 INFO L231 Difference]: Finished difference. Result has 425 places, 705 transitions, 12414 flow [2024-06-28 04:38:07,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12248, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12414, PETRI_PLACES=425, PETRI_TRANSITIONS=705} [2024-06-28 04:38:07,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-28 04:38:07,204 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 705 transitions, 12414 flow [2024-06-28 04:38:07,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:07,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:07,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:07,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 04:38:07,205 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:07,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1904645050, now seen corresponding path program 8 times [2024-06-28 04:38:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77735587] [2024-06-28 04:38:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:07,963 INFO 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 04:38:07,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:07,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77735587] [2024-06-28 04:38:07,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77735587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:07,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:07,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:38:07,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520505973] [2024-06-28 04:38:07,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:07,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:38:07,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:38:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:38:08,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:38:08,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 705 transitions, 12414 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:08,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:08,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:38:08,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:10,138 INFO L124 PetriNetUnfolderBase]: 5274/8356 cut-off events. [2024-06-28 04:38:10,138 INFO L125 PetriNetUnfolderBase]: For 1243591/1243591 co-relation queries the response was YES. [2024-06-28 04:38:10,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77932 conditions, 8356 events. 5274/8356 cut-off events. For 1243591/1243591 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53913 event pairs, 1171 based on Foata normal form. 4/8353 useless extension candidates. Maximal degree in co-relation 77733. Up to 7387 conditions per place. [2024-06-28 04:38:10,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 608 selfloop transitions, 117 changer transitions 0/730 dead transitions. [2024-06-28 04:38:10,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 730 transitions, 14266 flow [2024-06-28 04:38:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:38:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:38:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 04:38:10,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 04:38:10,273 INFO L175 Difference]: Start difference. First operand has 425 places, 705 transitions, 12414 flow. Second operand 8 states and 145 transitions. [2024-06-28 04:38:10,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 730 transitions, 14266 flow [2024-06-28 04:38:15,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 730 transitions, 14073 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 04:38:15,869 INFO L231 Difference]: Finished difference. Result has 426 places, 709 transitions, 12546 flow [2024-06-28 04:38:15,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12221, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12546, PETRI_PLACES=426, PETRI_TRANSITIONS=709} [2024-06-28 04:38:15,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-28 04:38:15,870 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 709 transitions, 12546 flow [2024-06-28 04:38:15,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:15,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:15,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:15,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 04:38:15,871 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:15,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1120924064, now seen corresponding path program 9 times [2024-06-28 04:38:15,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:15,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613725530] [2024-06-28 04:38:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:15,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:16,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:16,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613725530] [2024-06-28 04:38:16,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613725530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:16,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:16,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:38:16,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844270054] [2024-06-28 04:38:16,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:16,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:38:16,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:38:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:38:16,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:38:16,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 709 transitions, 12546 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:16,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:16,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:38:16,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:19,068 INFO L124 PetriNetUnfolderBase]: 5258/8328 cut-off events. [2024-06-28 04:38:19,068 INFO L125 PetriNetUnfolderBase]: For 1241939/1241939 co-relation queries the response was YES. [2024-06-28 04:38:19,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77585 conditions, 8328 events. 5258/8328 cut-off events. For 1241939/1241939 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53681 event pairs, 1172 based on Foata normal form. 4/8325 useless extension candidates. Maximal degree in co-relation 77385. Up to 7374 conditions per place. [2024-06-28 04:38:19,209 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 608 selfloop transitions, 115 changer transitions 0/728 dead transitions. [2024-06-28 04:38:19,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 728 transitions, 14073 flow [2024-06-28 04:38:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:38:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:38:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:38:19,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:38:19,210 INFO L175 Difference]: Start difference. First operand has 426 places, 709 transitions, 12546 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:38:19,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 728 transitions, 14073 flow [2024-06-28 04:38:24,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 728 transitions, 13646 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-28 04:38:24,180 INFO L231 Difference]: Finished difference. Result has 427 places, 709 transitions, 12358 flow [2024-06-28 04:38:24,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12119, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12358, PETRI_PLACES=427, PETRI_TRANSITIONS=709} [2024-06-28 04:38:24,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-28 04:38:24,180 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 709 transitions, 12358 flow [2024-06-28 04:38:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:24,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:24,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:24,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 04:38:24,181 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:24,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash 97897280, now seen corresponding path program 10 times [2024-06-28 04:38:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599993125] [2024-06-28 04:38:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:25,052 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 04:38:25,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:25,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599993125] [2024-06-28 04:38:25,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599993125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:25,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:25,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:38:25,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415587267] [2024-06-28 04:38:25,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:25,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:38:25,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:25,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:38:25,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:38:25,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:38:25,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 709 transitions, 12358 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:25,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:25,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:38:25,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:27,399 INFO L124 PetriNetUnfolderBase]: 5278/8364 cut-off events. [2024-06-28 04:38:27,399 INFO L125 PetriNetUnfolderBase]: For 1256783/1256783 co-relation queries the response was YES. [2024-06-28 04:38:27,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77637 conditions, 8364 events. 5278/8364 cut-off events. For 1256783/1256783 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 54062 event pairs, 1196 based on Foata normal form. 4/8348 useless extension candidates. Maximal degree in co-relation 77437. Up to 7184 conditions per place. [2024-06-28 04:38:27,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 569 selfloop transitions, 159 changer transitions 0/733 dead transitions. [2024-06-28 04:38:27,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 733 transitions, 14214 flow [2024-06-28 04:38:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:38:27,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:38:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:38:27,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:38:27,524 INFO L175 Difference]: Start difference. First operand has 427 places, 709 transitions, 12358 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:38:27,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 733 transitions, 14214 flow [2024-06-28 04:38:31,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 733 transitions, 13932 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 04:38:31,912 INFO L231 Difference]: Finished difference. Result has 428 places, 714 transitions, 12596 flow [2024-06-28 04:38:31,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12076, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12596, PETRI_PLACES=428, PETRI_TRANSITIONS=714} [2024-06-28 04:38:31,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-28 04:38:31,913 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 714 transitions, 12596 flow [2024-06-28 04:38:31,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:31,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:31,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:31,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 04:38:31,913 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:31,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:31,914 INFO L85 PathProgramCache]: Analyzing trace with hash -37078510, now seen corresponding path program 11 times [2024-06-28 04:38:31,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:31,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891560342] [2024-06-28 04:38:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:31,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:38:32,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891560342] [2024-06-28 04:38:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891560342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:32,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:32,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:38:32,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858392081] [2024-06-28 04:38:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:38:32,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:38:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:38:32,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:38:32,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 714 transitions, 12596 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:32,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:32,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:38:32,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:35,180 INFO L124 PetriNetUnfolderBase]: 5298/8398 cut-off events. [2024-06-28 04:38:35,181 INFO L125 PetriNetUnfolderBase]: For 1283037/1283037 co-relation queries the response was YES. [2024-06-28 04:38:35,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78549 conditions, 8398 events. 5298/8398 cut-off events. For 1283037/1283037 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 54314 event pairs, 1201 based on Foata normal form. 4/8382 useless extension candidates. Maximal degree in co-relation 78347. Up to 7200 conditions per place. [2024-06-28 04:38:35,311 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 587 selfloop transitions, 146 changer transitions 0/738 dead transitions. [2024-06-28 04:38:35,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 738 transitions, 14470 flow [2024-06-28 04:38:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:38:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:38:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 04:38:35,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:38:35,313 INFO L175 Difference]: Start difference. First operand has 428 places, 714 transitions, 12596 flow. Second operand 8 states and 148 transitions. [2024-06-28 04:38:35,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 738 transitions, 14470 flow [2024-06-28 04:38:40,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 738 transitions, 14272 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 04:38:40,083 INFO L231 Difference]: Finished difference. Result has 433 places, 718 transitions, 12786 flow [2024-06-28 04:38:40,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12401, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12786, PETRI_PLACES=433, PETRI_TRANSITIONS=718} [2024-06-28 04:38:40,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-28 04:38:40,084 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 718 transitions, 12786 flow [2024-06-28 04:38:40,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:40,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:40,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:40,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 04:38:40,084 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:40,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2077209792, now seen corresponding path program 12 times [2024-06-28 04:38:40,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:40,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926429260] [2024-06-28 04:38:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:41,013 INFO 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 04:38:41,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:41,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926429260] [2024-06-28 04:38:41,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926429260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:41,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:38:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149087510] [2024-06-28 04:38:41,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:41,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:38:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:38:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:38:41,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:38:41,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 718 transitions, 12786 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:41,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:41,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:38:41,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:43,375 INFO L124 PetriNetUnfolderBase]: 5292/8410 cut-off events. [2024-06-28 04:38:43,375 INFO L125 PetriNetUnfolderBase]: For 1292091/1292091 co-relation queries the response was YES. [2024-06-28 04:38:43,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78262 conditions, 8410 events. 5292/8410 cut-off events. For 1292091/1292091 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 54550 event pairs, 1184 based on Foata normal form. 6/8396 useless extension candidates. Maximal degree in co-relation 78059. Up to 6921 conditions per place. [2024-06-28 04:38:43,512 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 555 selfloop transitions, 180 changer transitions 0/740 dead transitions. [2024-06-28 04:38:43,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 740 transitions, 14862 flow [2024-06-28 04:38:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:38:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:38:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 04:38:43,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 04:38:43,514 INFO L175 Difference]: Start difference. First operand has 433 places, 718 transitions, 12786 flow. Second operand 8 states and 150 transitions. [2024-06-28 04:38:43,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 740 transitions, 14862 flow [2024-06-28 04:38:48,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 740 transitions, 14486 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 04:38:48,801 INFO L231 Difference]: Finished difference. Result has 436 places, 721 transitions, 12845 flow [2024-06-28 04:38:48,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12410, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12845, PETRI_PLACES=436, PETRI_TRANSITIONS=721} [2024-06-28 04:38:48,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-28 04:38:48,802 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 721 transitions, 12845 flow [2024-06-28 04:38:48,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:48,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:48,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:48,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 04:38:48,803 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:48,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:48,803 INFO L85 PathProgramCache]: Analyzing trace with hash -837651764, now seen corresponding path program 13 times [2024-06-28 04:38:48,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:48,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037546680] [2024-06-28 04:38:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:49,389 INFO 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 04:38:49,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:49,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037546680] [2024-06-28 04:38:49,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037546680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:49,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:49,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:38:49,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892831403] [2024-06-28 04:38:49,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:49,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:38:49,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:49,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:38:49,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:38:49,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:38:49,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 721 transitions, 12845 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:49,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:49,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:38:49,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:38:51,626 INFO L124 PetriNetUnfolderBase]: 5358/8479 cut-off events. [2024-06-28 04:38:51,627 INFO L125 PetriNetUnfolderBase]: For 1297626/1297626 co-relation queries the response was YES. [2024-06-28 04:38:51,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79700 conditions, 8479 events. 5358/8479 cut-off events. For 1297626/1297626 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 54860 event pairs, 1141 based on Foata normal form. 2/8479 useless extension candidates. Maximal degree in co-relation 79496. Up to 7954 conditions per place. [2024-06-28 04:38:51,770 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 693 selfloop transitions, 79 changer transitions 0/777 dead transitions. [2024-06-28 04:38:51,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 777 transitions, 15390 flow [2024-06-28 04:38:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:38:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:38:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 04:38:51,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 04:38:51,772 INFO L175 Difference]: Start difference. First operand has 436 places, 721 transitions, 12845 flow. Second operand 10 states and 175 transitions. [2024-06-28 04:38:51,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 777 transitions, 15390 flow [2024-06-28 04:38:57,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 777 transitions, 15037 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 04:38:57,941 INFO L231 Difference]: Finished difference. Result has 443 places, 747 transitions, 13403 flow [2024-06-28 04:38:57,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13403, PETRI_PLACES=443, PETRI_TRANSITIONS=747} [2024-06-28 04:38:57,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-28 04:38:57,942 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 747 transitions, 13403 flow [2024-06-28 04:38:57,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:57,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:38:57,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:38:57,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 04:38:57,942 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:38:57,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:38:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1360008128, now seen corresponding path program 5 times [2024-06-28 04:38:57,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:38:57,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155083749] [2024-06-28 04:38:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:38:57,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:38:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:38:58,513 INFO 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 04:38:58,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:38:58,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155083749] [2024-06-28 04:38:58,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155083749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:38:58,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:38:58,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:38:58,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840476415] [2024-06-28 04:38:58,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:38:58,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:38:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:38:58,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:38:58,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:38:58,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:38:58,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 747 transitions, 13403 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:38:58,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:38:58,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:38:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:00,752 INFO L124 PetriNetUnfolderBase]: 5403/8547 cut-off events. [2024-06-28 04:39:00,752 INFO L125 PetriNetUnfolderBase]: For 1317794/1317794 co-relation queries the response was YES. [2024-06-28 04:39:00,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79911 conditions, 8547 events. 5403/8547 cut-off events. For 1317794/1317794 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 55385 event pairs, 1151 based on Foata normal form. 2/8547 useless extension candidates. Maximal degree in co-relation 79704. Up to 8067 conditions per place. [2024-06-28 04:39:00,895 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 733 selfloop transitions, 45 changer transitions 0/783 dead transitions. [2024-06-28 04:39:00,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 783 transitions, 15189 flow [2024-06-28 04:39:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:39:00,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 04:39:00,896 INFO L175 Difference]: Start difference. First operand has 443 places, 747 transitions, 13403 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:39:00,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 783 transitions, 15189 flow [2024-06-28 04:39:04,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 783 transitions, 15024 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 04:39:04,969 INFO L231 Difference]: Finished difference. Result has 449 places, 755 transitions, 13483 flow [2024-06-28 04:39:04,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13238, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13483, PETRI_PLACES=449, PETRI_TRANSITIONS=755} [2024-06-28 04:39:04,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-28 04:39:04,969 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 755 transitions, 13483 flow [2024-06-28 04:39:04,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:04,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:04,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:04,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 04:39:04,970 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:04,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash 632792736, now seen corresponding path program 14 times [2024-06-28 04:39:04,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:04,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143870144] [2024-06-28 04:39:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:05,634 INFO 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 04:39:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:05,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143870144] [2024-06-28 04:39:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143870144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:05,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434698179] [2024-06-28 04:39:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:05,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:05,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:05,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:05,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:39:05,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 755 transitions, 13483 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:05,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:05,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:39:05,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:08,043 INFO L124 PetriNetUnfolderBase]: 5463/8648 cut-off events. [2024-06-28 04:39:08,043 INFO L125 PetriNetUnfolderBase]: For 1338147/1338147 co-relation queries the response was YES. [2024-06-28 04:39:08,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81045 conditions, 8648 events. 5463/8648 cut-off events. For 1338147/1338147 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 56267 event pairs, 1273 based on Foata normal form. 2/8648 useless extension candidates. Maximal degree in co-relation 80836. Up to 8039 conditions per place. [2024-06-28 04:39:08,189 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 698 selfloop transitions, 115 changer transitions 0/818 dead transitions. [2024-06-28 04:39:08,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 818 transitions, 16118 flow [2024-06-28 04:39:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:39:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:39:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-28 04:39:08,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-28 04:39:08,190 INFO L175 Difference]: Start difference. First operand has 449 places, 755 transitions, 13483 flow. Second operand 11 states and 192 transitions. [2024-06-28 04:39:08,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 818 transitions, 16118 flow [2024-06-28 04:39:13,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 818 transitions, 15905 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-28 04:39:13,555 INFO L231 Difference]: Finished difference. Result has 456 places, 783 transitions, 14244 flow [2024-06-28 04:39:13,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13270, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14244, PETRI_PLACES=456, PETRI_TRANSITIONS=783} [2024-06-28 04:39:13,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-28 04:39:13,556 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 783 transitions, 14244 flow [2024-06-28 04:39:13,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:13,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:13,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:13,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 04:39:13,557 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:13,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2058478322, now seen corresponding path program 6 times [2024-06-28 04:39:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:13,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696106694] [2024-06-28 04:39:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:39:14,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:14,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696106694] [2024-06-28 04:39:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696106694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:14,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:14,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:39:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594642362] [2024-06-28 04:39:14,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:39:14,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:14,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:39:14,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:39:14,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:39:14,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 783 transitions, 14244 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:14,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:14,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:39:14,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:16,602 INFO L124 PetriNetUnfolderBase]: 5527/8737 cut-off events. [2024-06-28 04:39:16,602 INFO L125 PetriNetUnfolderBase]: For 1361339/1361339 co-relation queries the response was YES. [2024-06-28 04:39:16,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81981 conditions, 8737 events. 5527/8737 cut-off events. For 1361339/1361339 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 56807 event pairs, 1321 based on Foata normal form. 2/8737 useless extension candidates. Maximal degree in co-relation 81769. Up to 8236 conditions per place. [2024-06-28 04:39:16,749 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 770 selfloop transitions, 50 changer transitions 0/825 dead transitions. [2024-06-28 04:39:16,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 825 transitions, 16177 flow [2024-06-28 04:39:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:39:16,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 04:39:16,750 INFO L175 Difference]: Start difference. First operand has 456 places, 783 transitions, 14244 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:39:16,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 825 transitions, 16177 flow [2024-06-28 04:39:23,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 825 transitions, 15837 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 04:39:23,149 INFO L231 Difference]: Finished difference. Result has 459 places, 795 transitions, 14221 flow [2024-06-28 04:39:23,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13904, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14221, PETRI_PLACES=459, PETRI_TRANSITIONS=795} [2024-06-28 04:39:23,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-28 04:39:23,150 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 795 transitions, 14221 flow [2024-06-28 04:39:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:23,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:23,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:23,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 04:39:23,151 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:23,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash -835241374, now seen corresponding path program 7 times [2024-06-28 04:39:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:23,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737780986] [2024-06-28 04:39:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:23,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:23,844 INFO 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 04:39:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737780986] [2024-06-28 04:39:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737780986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:23,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:23,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:23,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481962999] [2024-06-28 04:39:23,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:23,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:23,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:23,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:23,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:39:23,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 795 transitions, 14221 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:23,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:23,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:39:23,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:26,579 INFO L124 PetriNetUnfolderBase]: 5579/8823 cut-off events. [2024-06-28 04:39:26,579 INFO L125 PetriNetUnfolderBase]: For 1366147/1366147 co-relation queries the response was YES. [2024-06-28 04:39:26,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82347 conditions, 8823 events. 5579/8823 cut-off events. For 1366147/1366147 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 57408 event pairs, 1264 based on Foata normal form. 2/8823 useless extension candidates. Maximal degree in co-relation 82133. Up to 8209 conditions per place. [2024-06-28 04:39:26,710 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 770 selfloop transitions, 65 changer transitions 0/840 dead transitions. [2024-06-28 04:39:26,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 840 transitions, 16315 flow [2024-06-28 04:39:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 04:39:26,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 04:39:26,712 INFO L175 Difference]: Start difference. First operand has 459 places, 795 transitions, 14221 flow. Second operand 9 states and 157 transitions. [2024-06-28 04:39:26,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 840 transitions, 16315 flow [2024-06-28 04:39:32,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 840 transitions, 16073 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-28 04:39:32,219 INFO L231 Difference]: Finished difference. Result has 462 places, 810 transitions, 14468 flow [2024-06-28 04:39:32,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14058, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14468, PETRI_PLACES=462, PETRI_TRANSITIONS=810} [2024-06-28 04:39:32,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-28 04:39:32,220 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 810 transitions, 14468 flow [2024-06-28 04:39:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:32,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:32,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 04:39:32,220 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:32,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1541392356, now seen corresponding path program 1 times [2024-06-28 04:39:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:32,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790555167] [2024-06-28 04:39:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:39:33,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:33,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790555167] [2024-06-28 04:39:33,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790555167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:33,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:33,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:33,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563836258] [2024-06-28 04:39:33,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:33,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:33,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:33,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:39:33,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 810 transitions, 14468 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:33,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:33,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:39:33,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:35,804 INFO L124 PetriNetUnfolderBase]: 5587/8843 cut-off events. [2024-06-28 04:39:35,805 INFO L125 PetriNetUnfolderBase]: For 1387802/1387802 co-relation queries the response was YES. [2024-06-28 04:39:35,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82961 conditions, 8843 events. 5587/8843 cut-off events. For 1387802/1387802 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 57760 event pairs, 1544 based on Foata normal form. 2/8843 useless extension candidates. Maximal degree in co-relation 82745. Up to 8384 conditions per place. [2024-06-28 04:39:35,956 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 805 selfloop transitions, 23 changer transitions 0/833 dead transitions. [2024-06-28 04:39:35,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 833 transitions, 16306 flow [2024-06-28 04:39:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:39:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:39:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 04:39:35,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:39:35,957 INFO L175 Difference]: Start difference. First operand has 462 places, 810 transitions, 14468 flow. Second operand 8 states and 136 transitions. [2024-06-28 04:39:35,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 833 transitions, 16306 flow [2024-06-28 04:39:42,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 833 transitions, 16075 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-28 04:39:42,589 INFO L231 Difference]: Finished difference. Result has 461 places, 812 transitions, 14386 flow [2024-06-28 04:39:42,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14237, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14386, PETRI_PLACES=461, PETRI_TRANSITIONS=812} [2024-06-28 04:39:42,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-28 04:39:42,590 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 812 transitions, 14386 flow [2024-06-28 04:39:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:42,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:42,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:42,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 04:39:42,590 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:42,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:42,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1019946888, now seen corresponding path program 2 times [2024-06-28 04:39:42,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:42,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179859143] [2024-06-28 04:39:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:42,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:43,665 INFO 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 04:39:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:43,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179859143] [2024-06-28 04:39:43,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179859143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:43,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:43,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:39:43,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290616540] [2024-06-28 04:39:43,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:43,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:39:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:39:43,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:39:43,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:39:43,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 812 transitions, 14386 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:43,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:43,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:39:43,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:46,162 INFO L124 PetriNetUnfolderBase]: 5595/8855 cut-off events. [2024-06-28 04:39:46,162 INFO L125 PetriNetUnfolderBase]: For 1406315/1406315 co-relation queries the response was YES. [2024-06-28 04:39:46,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83084 conditions, 8855 events. 5595/8855 cut-off events. For 1406315/1406315 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 57828 event pairs, 1578 based on Foata normal form. 2/8855 useless extension candidates. Maximal degree in co-relation 82868. Up to 8408 conditions per place. [2024-06-28 04:39:46,310 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 803 selfloop transitions, 24 changer transitions 0/832 dead transitions. [2024-06-28 04:39:46,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 832 transitions, 16206 flow [2024-06-28 04:39:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:39:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:39:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 04:39:46,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-28 04:39:46,312 INFO L175 Difference]: Start difference. First operand has 461 places, 812 transitions, 14386 flow. Second operand 8 states and 134 transitions. [2024-06-28 04:39:46,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 832 transitions, 16206 flow [2024-06-28 04:39:51,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 832 transitions, 16067 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 04:39:51,669 INFO L231 Difference]: Finished difference. Result has 463 places, 814 transitions, 14406 flow [2024-06-28 04:39:51,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14251, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14406, PETRI_PLACES=463, PETRI_TRANSITIONS=814} [2024-06-28 04:39:51,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-28 04:39:51,670 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 814 transitions, 14406 flow [2024-06-28 04:39:51,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:51,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:39:51,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:39:51,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 04:39:51,671 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:39:51,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:39:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 600533546, now seen corresponding path program 1 times [2024-06-28 04:39:51,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:39:51,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564766387] [2024-06-28 04:39:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:39:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:39:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:39:52,749 INFO 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 04:39:52,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:39:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564766387] [2024-06-28 04:39:52,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564766387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:39:52,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:39:52,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:39:52,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580762149] [2024-06-28 04:39:52,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:39:52,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:39:52,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:39:52,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:39:52,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:39:52,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:39:52,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 814 transitions, 14406 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:39:52,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:39:52,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:39:52,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:39:55,223 INFO L124 PetriNetUnfolderBase]: 5615/8879 cut-off events. [2024-06-28 04:39:55,224 INFO L125 PetriNetUnfolderBase]: For 1444223/1444223 co-relation queries the response was YES. [2024-06-28 04:39:55,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83242 conditions, 8879 events. 5615/8879 cut-off events. For 1444223/1444223 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 57803 event pairs, 1261 based on Foata normal form. 4/8876 useless extension candidates. Maximal degree in co-relation 83025. Up to 8113 conditions per place. [2024-06-28 04:39:55,374 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 750 selfloop transitions, 86 changer transitions 0/841 dead transitions. [2024-06-28 04:39:55,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 841 transitions, 16282 flow [2024-06-28 04:39:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:39:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:39:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 04:39:55,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 04:39:55,389 INFO L175 Difference]: Start difference. First operand has 463 places, 814 transitions, 14406 flow. Second operand 9 states and 156 transitions. [2024-06-28 04:39:55,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 841 transitions, 16282 flow [2024-06-28 04:40:02,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 841 transitions, 16129 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-28 04:40:02,305 INFO L231 Difference]: Finished difference. Result has 465 places, 818 transitions, 14546 flow [2024-06-28 04:40:02,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14257, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14546, PETRI_PLACES=465, PETRI_TRANSITIONS=818} [2024-06-28 04:40:02,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-28 04:40:02,306 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 818 transitions, 14546 flow [2024-06-28 04:40:02,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:02,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:02,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:40:02,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 04:40:02,306 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:02,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:02,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1546573762, now seen corresponding path program 3 times [2024-06-28 04:40:02,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:02,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716424012] [2024-06-28 04:40:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:02,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:03,432 INFO 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 04:40:03,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716424012] [2024-06-28 04:40:03,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716424012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:03,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:03,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:40:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210090248] [2024-06-28 04:40:03,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:03,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:40:03,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:40:03,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:40:03,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:40:03,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 818 transitions, 14546 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:03,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:03,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:40:03,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:06,201 INFO L124 PetriNetUnfolderBase]: 5623/8902 cut-off events. [2024-06-28 04:40:06,201 INFO L125 PetriNetUnfolderBase]: For 1447721/1447721 co-relation queries the response was YES. [2024-06-28 04:40:06,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83770 conditions, 8902 events. 5623/8902 cut-off events. For 1447721/1447721 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 58224 event pairs, 1558 based on Foata normal form. 2/8902 useless extension candidates. Maximal degree in co-relation 83553. Up to 8418 conditions per place. [2024-06-28 04:40:06,349 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 796 selfloop transitions, 37 changer transitions 0/838 dead transitions. [2024-06-28 04:40:06,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 838 transitions, 16384 flow [2024-06-28 04:40:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:40:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:40:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:40:06,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:40:06,351 INFO L175 Difference]: Start difference. First operand has 465 places, 818 transitions, 14546 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:40:06,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 838 transitions, 16384 flow [2024-06-28 04:40:11,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 838 transitions, 16137 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 04:40:11,439 INFO L231 Difference]: Finished difference. Result has 466 places, 820 transitions, 14484 flow [2024-06-28 04:40:11,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14299, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14484, PETRI_PLACES=466, PETRI_TRANSITIONS=820} [2024-06-28 04:40:11,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-28 04:40:11,440 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 820 transitions, 14484 flow [2024-06-28 04:40:11,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:11,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:11,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:40:11,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 04:40:11,441 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:11,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1545984076, now seen corresponding path program 2 times [2024-06-28 04:40:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:11,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871691796] [2024-06-28 04:40:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:11,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:12,740 INFO 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 04:40:12,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:12,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871691796] [2024-06-28 04:40:12,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871691796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:12,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:12,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:40:12,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911743023] [2024-06-28 04:40:12,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:12,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:40:12,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:40:12,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:40:12,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:40:12,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 820 transitions, 14484 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:12,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:12,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:40:12,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:15,556 INFO L124 PetriNetUnfolderBase]: 5643/8920 cut-off events. [2024-06-28 04:40:15,556 INFO L125 PetriNetUnfolderBase]: For 1489484/1489484 co-relation queries the response was YES. [2024-06-28 04:40:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83891 conditions, 8920 events. 5643/8920 cut-off events. For 1489484/1489484 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 58094 event pairs, 1242 based on Foata normal form. 4/8917 useless extension candidates. Maximal degree in co-relation 83673. Up to 7925 conditions per place. [2024-06-28 04:40:15,710 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 719 selfloop transitions, 121 changer transitions 0/845 dead transitions. [2024-06-28 04:40:15,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 845 transitions, 16357 flow [2024-06-28 04:40:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 04:40:15,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-28 04:40:15,712 INFO L175 Difference]: Start difference. First operand has 466 places, 820 transitions, 14484 flow. Second operand 9 states and 158 transitions. [2024-06-28 04:40:15,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 845 transitions, 16357 flow [2024-06-28 04:40:22,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 845 transitions, 16188 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 04:40:22,913 INFO L231 Difference]: Finished difference. Result has 469 places, 824 transitions, 14682 flow [2024-06-28 04:40:22,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14315, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14682, PETRI_PLACES=469, PETRI_TRANSITIONS=824} [2024-06-28 04:40:22,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-28 04:40:22,913 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 824 transitions, 14682 flow [2024-06-28 04:40:22,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:22,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:22,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:40:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 04:40:22,914 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:22,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 327811350, now seen corresponding path program 3 times [2024-06-28 04:40:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910482490] [2024-06-28 04:40:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:23,977 INFO 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 04:40:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910482490] [2024-06-28 04:40:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910482490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:23,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:23,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:40:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004248049] [2024-06-28 04:40:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:23,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:40:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:40:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:40:24,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:40:24,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 824 transitions, 14682 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:24,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:24,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:40:24,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:26,724 INFO L124 PetriNetUnfolderBase]: 5663/8963 cut-off events. [2024-06-28 04:40:26,724 INFO L125 PetriNetUnfolderBase]: For 1512341/1512341 co-relation queries the response was YES. [2024-06-28 04:40:26,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84637 conditions, 8963 events. 5663/8963 cut-off events. For 1512341/1512341 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 58484 event pairs, 1238 based on Foata normal form. 4/8960 useless extension candidates. Maximal degree in co-relation 84418. Up to 7953 conditions per place. [2024-06-28 04:40:26,874 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 715 selfloop transitions, 130 changer transitions 0/850 dead transitions. [2024-06-28 04:40:26,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 850 transitions, 16583 flow [2024-06-28 04:40:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 04:40:26,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 04:40:26,875 INFO L175 Difference]: Start difference. First operand has 469 places, 824 transitions, 14682 flow. Second operand 9 states and 159 transitions. [2024-06-28 04:40:26,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 850 transitions, 16583 flow [2024-06-28 04:40:33,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 850 transitions, 16258 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-28 04:40:33,636 INFO L231 Difference]: Finished difference. Result has 471 places, 828 transitions, 14750 flow [2024-06-28 04:40:33,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14357, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14750, PETRI_PLACES=471, PETRI_TRANSITIONS=828} [2024-06-28 04:40:33,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-28 04:40:33,637 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 828 transitions, 14750 flow [2024-06-28 04:40:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:33,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:33,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:40:33,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 04:40:33,637 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:33,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:33,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1546758460, now seen corresponding path program 1 times [2024-06-28 04:40:33,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:33,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604206708] [2024-06-28 04:40:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:33,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:40:34,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:34,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604206708] [2024-06-28 04:40:34,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604206708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:34,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:34,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 04:40:34,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634156856] [2024-06-28 04:40:34,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:34,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 04:40:34,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 04:40:34,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-28 04:40:34,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:40:34,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 828 transitions, 14750 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:34,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:34,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:40:34,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:37,373 INFO L124 PetriNetUnfolderBase]: 5650/8914 cut-off events. [2024-06-28 04:40:37,373 INFO L125 PetriNetUnfolderBase]: For 1498989/1498989 co-relation queries the response was YES. [2024-06-28 04:40:37,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84012 conditions, 8914 events. 5650/8914 cut-off events. For 1498989/1498989 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 57975 event pairs, 1334 based on Foata normal form. 4/8911 useless extension candidates. Maximal degree in co-relation 83792. Up to 8223 conditions per place. [2024-06-28 04:40:37,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 753 selfloop transitions, 90 changer transitions 0/848 dead transitions. [2024-06-28 04:40:37,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 848 transitions, 16541 flow [2024-06-28 04:40:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:40:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:40:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 04:40:37,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 04:40:37,524 INFO L175 Difference]: Start difference. First operand has 471 places, 828 transitions, 14750 flow. Second operand 9 states and 153 transitions. [2024-06-28 04:40:37,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 848 transitions, 16541 flow [2024-06-28 04:40:44,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 848 transitions, 16138 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-28 04:40:44,040 INFO L231 Difference]: Finished difference. Result has 473 places, 828 transitions, 14537 flow [2024-06-28 04:40:44,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14347, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14537, PETRI_PLACES=473, PETRI_TRANSITIONS=828} [2024-06-28 04:40:44,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-28 04:40:44,041 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 828 transitions, 14537 flow [2024-06-28 04:40:44,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:44,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:44,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:40:44,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 04:40:44,042 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:44,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:44,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1546758212, now seen corresponding path program 4 times [2024-06-28 04:40:44,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:44,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927087434] [2024-06-28 04:40:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:44,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:45,277 INFO 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 04:40:45,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:45,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927087434] [2024-06-28 04:40:45,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927087434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:45,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:45,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:40:45,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111864181] [2024-06-28 04:40:45,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:45,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:40:45,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:40:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:40:45,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:40:45,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 828 transitions, 14537 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:45,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:45,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:40:45,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:48,112 INFO L124 PetriNetUnfolderBase]: 5670/8958 cut-off events. [2024-06-28 04:40:48,113 INFO L125 PetriNetUnfolderBase]: For 1519478/1519478 co-relation queries the response was YES. [2024-06-28 04:40:48,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84004 conditions, 8958 events. 5670/8958 cut-off events. For 1519478/1519478 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 58337 event pairs, 1235 based on Foata normal form. 4/8955 useless extension candidates. Maximal degree in co-relation 83783. Up to 7892 conditions per place. [2024-06-28 04:40:48,267 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 702 selfloop transitions, 150 changer transitions 0/857 dead transitions. [2024-06-28 04:40:48,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 857 transitions, 16474 flow [2024-06-28 04:40:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:40:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:40:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-28 04:40:48,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-28 04:40:48,269 INFO L175 Difference]: Start difference. First operand has 473 places, 828 transitions, 14537 flow. Second operand 10 states and 176 transitions. [2024-06-28 04:40:48,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 857 transitions, 16474 flow [2024-06-28 04:40:55,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 857 transitions, 16262 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-28 04:40:55,851 INFO L231 Difference]: Finished difference. Result has 475 places, 832 transitions, 14767 flow [2024-06-28 04:40:55,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14325, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14767, PETRI_PLACES=475, PETRI_TRANSITIONS=832} [2024-06-28 04:40:55,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-28 04:40:55,852 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 832 transitions, 14767 flow [2024-06-28 04:40:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:55,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:40:55,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:40:55,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 04:40:55,852 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:40:55,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:40:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2070758320, now seen corresponding path program 5 times [2024-06-28 04:40:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:40:55,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266759930] [2024-06-28 04:40:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:40:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:40:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:40:56,797 INFO 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 04:40:56,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:40:56,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266759930] [2024-06-28 04:40:56,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266759930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:40:56,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:40:56,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:40:56,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024121559] [2024-06-28 04:40:56,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:40:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:40:56,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:40:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:40:56,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:40:56,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:40:56,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 832 transitions, 14767 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:40:56,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:40:56,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:40:56,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:40:59,279 INFO L124 PetriNetUnfolderBase]: 5690/8982 cut-off events. [2024-06-28 04:40:59,279 INFO L125 PetriNetUnfolderBase]: For 1522887/1522887 co-relation queries the response was YES. [2024-06-28 04:40:59,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84612 conditions, 8982 events. 5690/8982 cut-off events. For 1522887/1522887 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 58478 event pairs, 1259 based on Foata normal form. 4/8966 useless extension candidates. Maximal degree in co-relation 84392. Up to 7607 conditions per place. [2024-06-28 04:40:59,430 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 633 selfloop transitions, 218 changer transitions 0/856 dead transitions. [2024-06-28 04:40:59,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 856 transitions, 16948 flow [2024-06-28 04:40:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:40:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:40:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:40:59,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:40:59,432 INFO L175 Difference]: Start difference. First operand has 475 places, 832 transitions, 14767 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:40:59,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 856 transitions, 16948 flow [2024-06-28 04:41:06,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 856 transitions, 16550 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-28 04:41:06,603 INFO L231 Difference]: Finished difference. Result has 475 places, 836 transitions, 14953 flow [2024-06-28 04:41:06,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14369, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14953, PETRI_PLACES=475, PETRI_TRANSITIONS=836} [2024-06-28 04:41:06,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-28 04:41:06,604 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 836 transitions, 14953 flow [2024-06-28 04:41:06,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:06,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:06,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:41:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 04:41:06,604 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:06,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2077020940, now seen corresponding path program 6 times [2024-06-28 04:41:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:06,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612928742] [2024-06-28 04:41:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:41:07,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:07,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612928742] [2024-06-28 04:41:07,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612928742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:07,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:07,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:41:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750965335] [2024-06-28 04:41:07,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:07,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:41:07,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:41:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:41:08,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:41:08,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 836 transitions, 14953 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:08,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:08,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:41:08,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:10,589 INFO L124 PetriNetUnfolderBase]: 5710/9026 cut-off events. [2024-06-28 04:41:10,589 INFO L125 PetriNetUnfolderBase]: For 1548356/1548356 co-relation queries the response was YES. [2024-06-28 04:41:10,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85289 conditions, 9026 events. 5710/9026 cut-off events. For 1548356/1548356 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 58921 event pairs, 1260 based on Foata normal form. 4/9010 useless extension candidates. Maximal degree in co-relation 85068. Up to 7461 conditions per place. [2024-06-28 04:41:10,744 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 661 selfloop transitions, 197 changer transitions 0/863 dead transitions. [2024-06-28 04:41:10,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 863 transitions, 17426 flow [2024-06-28 04:41:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:10,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 04:41:10,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 04:41:10,746 INFO L175 Difference]: Start difference. First operand has 475 places, 836 transitions, 14953 flow. Second operand 9 states and 166 transitions. [2024-06-28 04:41:10,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 863 transitions, 17426 flow [2024-06-28 04:41:17,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 863 transitions, 16772 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-28 04:41:17,741 INFO L231 Difference]: Finished difference. Result has 477 places, 840 transitions, 14844 flow [2024-06-28 04:41:17,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14313, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14844, PETRI_PLACES=477, PETRI_TRANSITIONS=840} [2024-06-28 04:41:17,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-28 04:41:17,760 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 840 transitions, 14844 flow [2024-06-28 04:41:17,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:17,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:17,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:41:17,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 04:41:17,760 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:17,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2077198880, now seen corresponding path program 4 times [2024-06-28 04:41:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:17,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809491350] [2024-06-28 04:41:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:41:18,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:18,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809491350] [2024-06-28 04:41:18,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809491350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:18,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:18,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:18,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598236726] [2024-06-28 04:41:18,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:18,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:18,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:18,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:18,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:19,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:41:19,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 840 transitions, 14844 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:19,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:19,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:41:19,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:21,507 INFO L124 PetriNetUnfolderBase]: 5705/9004 cut-off events. [2024-06-28 04:41:21,508 INFO L125 PetriNetUnfolderBase]: For 1529956/1529956 co-relation queries the response was YES. [2024-06-28 04:41:21,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84650 conditions, 9004 events. 5705/9004 cut-off events. For 1529956/1529956 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 58759 event pairs, 1562 based on Foata normal form. 2/8999 useless extension candidates. Maximal degree in co-relation 84429. Up to 8517 conditions per place. [2024-06-28 04:41:21,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 812 selfloop transitions, 41 changer transitions 0/858 dead transitions. [2024-06-28 04:41:21,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 858 transitions, 16718 flow [2024-06-28 04:41:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:41:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:41:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 04:41:21,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 04:41:21,948 INFO L175 Difference]: Start difference. First operand has 477 places, 840 transitions, 14844 flow. Second operand 8 states and 135 transitions. [2024-06-28 04:41:21,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 858 transitions, 16718 flow [2024-06-28 04:41:27,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 858 transitions, 16220 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-28 04:41:27,556 INFO L231 Difference]: Finished difference. Result has 478 places, 842 transitions, 14543 flow [2024-06-28 04:41:27,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14346, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14543, PETRI_PLACES=478, PETRI_TRANSITIONS=842} [2024-06-28 04:41:27,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-28 04:41:27,557 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 842 transitions, 14543 flow [2024-06-28 04:41:27,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:27,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:27,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:41:27,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 04:41:27,557 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:27,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2077193920, now seen corresponding path program 7 times [2024-06-28 04:41:27,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:27,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052837876] [2024-06-28 04:41:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:28,776 INFO 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 04:41:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:28,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052837876] [2024-06-28 04:41:28,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052837876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:28,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:28,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:41:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747814061] [2024-06-28 04:41:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:28,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:41:28,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:28,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:41:28,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:41:28,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:41:28,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 842 transitions, 14543 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:28,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:28,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:41:28,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:31,872 INFO L124 PetriNetUnfolderBase]: 5725/9031 cut-off events. [2024-06-28 04:41:31,873 INFO L125 PetriNetUnfolderBase]: For 1566751/1566751 co-relation queries the response was YES. [2024-06-28 04:41:31,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84257 conditions, 9031 events. 5725/9031 cut-off events. For 1566751/1566751 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 58794 event pairs, 1265 based on Foata normal form. 4/9015 useless extension candidates. Maximal degree in co-relation 84035. Up to 7470 conditions per place. [2024-06-28 04:41:32,134 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 660 selfloop transitions, 202 changer transitions 0/867 dead transitions. [2024-06-28 04:41:32,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 867 transitions, 17008 flow [2024-06-28 04:41:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 04:41:32,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-28 04:41:32,135 INFO L175 Difference]: Start difference. First operand has 478 places, 842 transitions, 14543 flow. Second operand 9 states and 164 transitions. [2024-06-28 04:41:32,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 867 transitions, 17008 flow [2024-06-28 04:41:40,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 867 transitions, 16827 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 04:41:40,045 INFO L231 Difference]: Finished difference. Result has 481 places, 846 transitions, 14905 flow [2024-06-28 04:41:40,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14362, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14905, PETRI_PLACES=481, PETRI_TRANSITIONS=846} [2024-06-28 04:41:40,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-28 04:41:40,050 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 846 transitions, 14905 flow [2024-06-28 04:41:40,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:40,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:40,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:41:40,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 04:41:40,051 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:40,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:40,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1585783684, now seen corresponding path program 8 times [2024-06-28 04:41:40,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:40,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830315170] [2024-06-28 04:41:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:40,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:41:41,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830315170] [2024-06-28 04:41:41,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830315170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:41,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:41,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:41:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998740052] [2024-06-28 04:41:41,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:41,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:41:41,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:41:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:41:41,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:41:41,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 846 transitions, 14905 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:41,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:41,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:41:41,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:44,455 INFO L124 PetriNetUnfolderBase]: 5713/9029 cut-off events. [2024-06-28 04:41:44,456 INFO L125 PetriNetUnfolderBase]: For 1553145/1553145 co-relation queries the response was YES. [2024-06-28 04:41:44,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84311 conditions, 9029 events. 5713/9029 cut-off events. For 1553145/1553145 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 58940 event pairs, 1262 based on Foata normal form. 4/9013 useless extension candidates. Maximal degree in co-relation 84088. Up to 7802 conditions per place. [2024-06-28 04:41:44,595 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 681 selfloop transitions, 180 changer transitions 0/866 dead transitions. [2024-06-28 04:41:44,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 866 transitions, 16712 flow [2024-06-28 04:41:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:41:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:41:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 04:41:44,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-28 04:41:44,596 INFO L175 Difference]: Start difference. First operand has 481 places, 846 transitions, 14905 flow. Second operand 9 states and 160 transitions. [2024-06-28 04:41:44,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 866 transitions, 16712 flow [2024-06-28 04:41:53,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 866 transitions, 16303 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-28 04:41:53,147 INFO L231 Difference]: Finished difference. Result has 485 places, 846 transitions, 14863 flow [2024-06-28 04:41:53,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14496, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14863, PETRI_PLACES=485, PETRI_TRANSITIONS=846} [2024-06-28 04:41:53,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-28 04:41:53,148 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 846 transitions, 14863 flow [2024-06-28 04:41:53,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:53,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:41:53,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:41:53,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 04:41:53,149 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:41:53,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:41:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1176296729, now seen corresponding path program 1 times [2024-06-28 04:41:53,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:41:53,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568708284] [2024-06-28 04:41:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:41:53,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:41:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:41:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:41:54,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:41:54,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568708284] [2024-06-28 04:41:54,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568708284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:41:54,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:41:54,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:41:54,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441719251] [2024-06-28 04:41:54,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:41:54,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:41:54,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:41:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:41:54,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:41:54,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:41:54,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 846 transitions, 14863 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:41:54,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:41:54,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:41:54,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:41:57,063 INFO L124 PetriNetUnfolderBase]: 5695/9019 cut-off events. [2024-06-28 04:41:57,064 INFO L125 PetriNetUnfolderBase]: For 1533180/1533180 co-relation queries the response was YES. [2024-06-28 04:41:57,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82945 conditions, 9019 events. 5695/9019 cut-off events. For 1533180/1533180 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 59225 event pairs, 1322 based on Foata normal form. 6/9023 useless extension candidates. Maximal degree in co-relation 82721. Up to 8388 conditions per place. [2024-06-28 04:41:57,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 755 selfloop transitions, 110 changer transitions 0/870 dead transitions. [2024-06-28 04:41:57,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 870 transitions, 16703 flow [2024-06-28 04:41:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:41:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:41:57,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 04:41:57,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-28 04:41:57,205 INFO L175 Difference]: Start difference. First operand has 485 places, 846 transitions, 14863 flow. Second operand 8 states and 142 transitions. [2024-06-28 04:41:57,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 870 transitions, 16703 flow [2024-06-28 04:42:03,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 870 transitions, 15827 flow, removed 181 selfloop flow, removed 9 redundant places. [2024-06-28 04:42:03,126 INFO L231 Difference]: Finished difference. Result has 484 places, 846 transitions, 14261 flow [2024-06-28 04:42:03,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13987, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14261, PETRI_PLACES=484, PETRI_TRANSITIONS=846} [2024-06-28 04:42:03,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-28 04:42:03,126 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 846 transitions, 14261 flow [2024-06-28 04:42:03,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:03,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:03,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:42:03,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 04:42:03,127 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:03,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1985498189, now seen corresponding path program 2 times [2024-06-28 04:42:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:03,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510023520] [2024-06-28 04:42:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:03,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:03,824 INFO 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 04:42:03,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:03,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510023520] [2024-06-28 04:42:03,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510023520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:03,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:03,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:42:03,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428406569] [2024-06-28 04:42:03,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:03,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:42:03,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:03,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:42:03,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:42:03,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:42:03,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 846 transitions, 14261 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:03,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:03,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:42:03,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:06,734 INFO L124 PetriNetUnfolderBase]: 5700/8990 cut-off events. [2024-06-28 04:42:06,735 INFO L125 PetriNetUnfolderBase]: For 1484050/1484053 co-relation queries the response was YES. [2024-06-28 04:42:06,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82074 conditions, 8990 events. 5700/8990 cut-off events. For 1484050/1484053 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 58506 event pairs, 1101 based on Foata normal form. 3/8987 useless extension candidates. Maximal degree in co-relation 81849. Up to 8214 conditions per place. [2024-06-28 04:42:06,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 738 selfloop transitions, 131 changer transitions 0/874 dead transitions. [2024-06-28 04:42:06,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 874 transitions, 16258 flow [2024-06-28 04:42:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:42:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:42:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 04:42:06,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-28 04:42:06,993 INFO L175 Difference]: Start difference. First operand has 484 places, 846 transitions, 14261 flow. Second operand 8 states and 146 transitions. [2024-06-28 04:42:06,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 874 transitions, 16258 flow [2024-06-28 04:42:13,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 874 transitions, 16066 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 04:42:13,610 INFO L231 Difference]: Finished difference. Result has 486 places, 849 transitions, 14481 flow [2024-06-28 04:42:13,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14069, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14481, PETRI_PLACES=486, PETRI_TRANSITIONS=849} [2024-06-28 04:42:13,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-28 04:42:13,610 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 849 transitions, 14481 flow [2024-06-28 04:42:13,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:13,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:13,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:42:13,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 04:42:13,611 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:13,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash -341111884, now seen corresponding path program 1 times [2024-06-28 04:42:13,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:13,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360935210] [2024-06-28 04:42:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:13,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:42:14,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:14,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360935210] [2024-06-28 04:42:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360935210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:14,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:14,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:42:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319896341] [2024-06-28 04:42:14,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:14,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:42:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:42:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:42:14,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:42:14,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 849 transitions, 14481 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:14,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:14,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:42:14,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:17,185 INFO L124 PetriNetUnfolderBase]: 5702/8992 cut-off events. [2024-06-28 04:42:17,185 INFO L125 PetriNetUnfolderBase]: For 1509674/1509677 co-relation queries the response was YES. [2024-06-28 04:42:17,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82299 conditions, 8992 events. 5702/8992 cut-off events. For 1509674/1509677 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 58449 event pairs, 1155 based on Foata normal form. 4/8971 useless extension candidates. Maximal degree in co-relation 82073. Up to 8206 conditions per place. [2024-06-28 04:42:17,337 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 736 selfloop transitions, 135 changer transitions 0/876 dead transitions. [2024-06-28 04:42:17,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 876 transitions, 16463 flow [2024-06-28 04:42:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:42:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:42:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 04:42:17,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-28 04:42:17,339 INFO L175 Difference]: Start difference. First operand has 486 places, 849 transitions, 14481 flow. Second operand 8 states and 138 transitions. [2024-06-28 04:42:17,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 876 transitions, 16463 flow [2024-06-28 04:42:24,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 876 transitions, 16119 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 04:42:24,839 INFO L231 Difference]: Finished difference. Result has 488 places, 852 transitions, 14517 flow [2024-06-28 04:42:24,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14137, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14517, PETRI_PLACES=488, PETRI_TRANSITIONS=852} [2024-06-28 04:42:24,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-28 04:42:24,840 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 852 transitions, 14517 flow [2024-06-28 04:42:24,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:24,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:24,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:42:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 04:42:24,840 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:24,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash -573420782, now seen corresponding path program 2 times [2024-06-28 04:42:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827553983] [2024-06-28 04:42:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:25,509 INFO 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 04:42:25,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:25,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827553983] [2024-06-28 04:42:25,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827553983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:25,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:25,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:42:25,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282184371] [2024-06-28 04:42:25,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:25,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:42:25,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:25,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:42:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:42:25,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:42:25,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 852 transitions, 14517 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:25,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:25,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:42:25,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:28,309 INFO L124 PetriNetUnfolderBase]: 5696/8969 cut-off events. [2024-06-28 04:42:28,309 INFO L125 PetriNetUnfolderBase]: For 1509034/1509036 co-relation queries the response was YES. [2024-06-28 04:42:28,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82085 conditions, 8969 events. 5696/8969 cut-off events. For 1509034/1509036 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 58114 event pairs, 1080 based on Foata normal form. 4/8959 useless extension candidates. Maximal degree in co-relation 81858. Up to 8190 conditions per place. [2024-06-28 04:42:28,452 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 733 selfloop transitions, 137 changer transitions 0/875 dead transitions. [2024-06-28 04:42:28,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 875 transitions, 16391 flow [2024-06-28 04:42:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:42:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:42:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 04:42:28,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:42:28,453 INFO L175 Difference]: Start difference. First operand has 488 places, 852 transitions, 14517 flow. Second operand 8 states and 144 transitions. [2024-06-28 04:42:28,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 875 transitions, 16391 flow [2024-06-28 04:42:36,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 875 transitions, 16050 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 04:42:36,081 INFO L231 Difference]: Finished difference. Result has 490 places, 852 transitions, 14470 flow [2024-06-28 04:42:36,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14176, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14470, PETRI_PLACES=490, PETRI_TRANSITIONS=852} [2024-06-28 04:42:36,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-28 04:42:36,082 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 852 transitions, 14470 flow [2024-06-28 04:42:36,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:36,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:36,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:42:36,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 04:42:36,082 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:36,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash -560122672, now seen corresponding path program 3 times [2024-06-28 04:42:36,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:36,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271270279] [2024-06-28 04:42:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:36,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:36,784 INFO 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 04:42:36,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271270279] [2024-06-28 04:42:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271270279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:36,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:36,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:42:36,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807508490] [2024-06-28 04:42:36,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:36,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:42:36,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:36,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:42:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:42:36,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:42:36,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 852 transitions, 14470 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:36,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:36,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:42:36,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:39,656 INFO L124 PetriNetUnfolderBase]: 5722/9023 cut-off events. [2024-06-28 04:42:39,656 INFO L125 PetriNetUnfolderBase]: For 1552441/1552441 co-relation queries the response was YES. [2024-06-28 04:42:39,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82909 conditions, 9023 events. 5722/9023 cut-off events. For 1552441/1552441 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 58617 event pairs, 1040 based on Foata normal form. 2/9011 useless extension candidates. Maximal degree in co-relation 82681. Up to 7773 conditions per place. [2024-06-28 04:42:39,793 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 621 selfloop transitions, 251 changer transitions 0/877 dead transitions. [2024-06-28 04:42:39,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 877 transitions, 17049 flow [2024-06-28 04:42:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:42:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:42:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:42:39,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:42:39,795 INFO L175 Difference]: Start difference. First operand has 490 places, 852 transitions, 14470 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:42:39,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 877 transitions, 17049 flow [2024-06-28 04:42:46,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 877 transitions, 16788 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 04:42:46,221 INFO L231 Difference]: Finished difference. Result has 494 places, 858 transitions, 14990 flow [2024-06-28 04:42:46,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14209, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14990, PETRI_PLACES=494, PETRI_TRANSITIONS=858} [2024-06-28 04:42:46,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-28 04:42:46,222 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 858 transitions, 14990 flow [2024-06-28 04:42:46,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:46,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:42:46,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:42:46,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 04:42:46,223 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 04:42:46,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:42:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash -565802222, now seen corresponding path program 4 times [2024-06-28 04:42:46,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:42:46,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187369789] [2024-06-28 04:42:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:42:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:42:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:42:46,835 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 04:42:46,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:42:46,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187369789] [2024-06-28 04:42:46,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187369789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:42:46,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:42:46,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:42:46,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107073362] [2024-06-28 04:42:46,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:42:46,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:42:46,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:42:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:42:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:42:46,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 04:42:46,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 858 transitions, 14990 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:42:46,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:42:46,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 04:42:46,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:42:49,675 INFO L124 PetriNetUnfolderBase]: 5708/9012 cut-off events. [2024-06-28 04:42:49,675 INFO L125 PetriNetUnfolderBase]: For 1557290/1557290 co-relation queries the response was YES. [2024-06-28 04:42:49,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82898 conditions, 9012 events. 5708/9012 cut-off events. For 1557290/1557290 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 58657 event pairs, 1038 based on Foata normal form. 4/9002 useless extension candidates. Maximal degree in co-relation 82668. Up to 7763 conditions per place. [2024-06-28 04:42:49,817 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 594 selfloop transitions, 277 changer transitions 0/876 dead transitions. [2024-06-28 04:42:49,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 876 transitions, 17103 flow [2024-06-28 04:42:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:42:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:42:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 04:42:49,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-28 04:42:49,819 INFO L175 Difference]: Start difference. First operand has 494 places, 858 transitions, 14990 flow. Second operand 8 states and 149 transitions. [2024-06-28 04:42:49,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 876 transitions, 17103 flow