./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix054_pso.opt_rmo.opt_tso.oepc_tso.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-rel/mix054_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix054_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix054_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:10:00,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:10:00,928 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:10:00,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:10:00,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:10:00,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:10:00,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:10:00,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:10:00,959 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:10:00,962 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:10:00,962 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:10:00,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:10:00,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:10:00,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:10:00,964 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:10:00,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:10:00,965 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:10:00,965 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:10:00,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:10:00,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:10:00,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:10:00,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:10:00,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:10:00,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:10:00,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:10:00,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:10:00,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:10:00,968 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:10:00,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:10:00,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:10:00,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:10:00,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:10:00,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:10:00,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:10:00,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:10:00,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:10:00,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:10:00,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:10:00,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:10:00,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:10:00,971 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:10:00,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:10:00,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:10:00,972 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:10:01,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:10:01,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:10:01,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:10:01,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:10:01,158 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:10:01,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix054_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 19:10:02,159 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:10:02,449 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:10:02,451 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix054_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 19:10:02,465 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/821aea3ae/bca556ff865f49449c1cf5fab4c3656e/FLAG4a0c3b2ea [2024-06-21 19:10:02,504 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/821aea3ae/bca556ff865f49449c1cf5fab4c3656e [2024-06-21 19:10:02,506 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:10:02,507 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:10:02,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix054_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 19:10:02,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:10:02,583 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:10:02,584 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:10:02,584 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:10:02,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:10:02,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:10:02" (1/2) ... [2024-06-21 19:10:02,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c4c005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:10:02, skipping insertion in model container [2024-06-21 19:10:02,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:10:02" (1/2) ... [2024-06-21 19:10:02,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@25bb2786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:10:02, skipping insertion in model container [2024-06-21 19:10:02,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:10:02" (2/2) ... [2024-06-21 19:10:02,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c4c005 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:02, skipping insertion in model container [2024-06-21 19:10:02,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:10:02" (2/2) ... [2024-06-21 19:10:02,593 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:10:02,615 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:10:02,617 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:10:02,617 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )weak$$choice2 >= 0LL) && (1LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:10:02,617 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:10:02,617 INFO L106 edCorrectnessWitness]: ghost_update [L793-L793] multithreaded = 1; [2024-06-21 19:10:02,653 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:10:02,896 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:10:02,911 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:10:03,037 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:10:03,063 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:10:03,064 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03 WrapperNode [2024-06-21 19:10:03,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:10:03,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:10:03,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:10:03,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:10:03,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,125 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 131 [2024-06-21 19:10:03,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:10:03,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:10:03,134 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:10:03,134 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:10:03,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,145 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,162 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 19:10:03,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,197 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:10:03,202 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:10:03,202 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:10:03,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:10:03,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (1/1) ... [2024-06-21 19:10:03,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:10:03,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:10:03,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 19:10:03,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 19:10:03,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:10:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:10:03,328 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:10:03,328 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:10:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:10:03,329 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:10:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:10:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:10:03,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:10:03,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:10:03,330 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:10:03,462 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:10:03,463 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:10:03,778 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:10:03,778 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:10:03,899 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:10:03,900 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:10:03,901 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:10:03 BoogieIcfgContainer [2024-06-21 19:10:03,901 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:10:03,904 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:10:03,904 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:10:03,907 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:10:03,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:10:02" (1/4) ... [2024-06-21 19:10:03,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a482157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:10:03, skipping insertion in model container [2024-06-21 19:10:03,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:10:02" (2/4) ... [2024-06-21 19:10:03,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a482157 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:10:03, skipping insertion in model container [2024-06-21 19:10:03,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:10:03" (3/4) ... [2024-06-21 19:10:03,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a482157 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:10:03, skipping insertion in model container [2024-06-21 19:10:03,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:10:03" (4/4) ... [2024-06-21 19:10:03,911 INFO L112 eAbstractionObserver]: Analyzing ICFG mix054_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 19:10:03,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:10:03,924 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 19:10:03,924 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:10:03,961 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:10:03,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 19:10:04,013 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-21 19:10:04,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:10:04,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:10:04,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 19:10:04,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-21 19:10:04,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:10:04,028 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;@62212b84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:10:04,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 19:10:04,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:10:04,031 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:10:04,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:10:04,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:04,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:10:04,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:04,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash 324002771, now seen corresponding path program 1 times [2024-06-21 19:10:04,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:04,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282869682] [2024-06-21 19:10:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:04,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:04,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:04,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282869682] [2024-06-21 19:10:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282869682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:04,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:04,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:10:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530368974] [2024-06-21 19:10:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:04,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:10:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:10:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:10:04,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-21 19:10:04,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:04,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:04,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-21 19:10:04,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:05,070 INFO L124 PetriNetUnfolderBase]: 135/261 cut-off events. [2024-06-21 19:10:05,070 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 19:10:05,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 261 events. 135/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 947 event pairs, 79 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 516. Up to 243 conditions per place. [2024-06-21 19:10:05,074 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 20 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-21 19:10:05,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 109 flow [2024-06-21 19:10:05,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:10:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:10:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-21 19:10:05,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-06-21 19:10:05,084 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 49 transitions. [2024-06-21 19:10:05,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 109 flow [2024-06-21 19:10:05,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 19:10:05,087 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-21 19:10:05,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-21 19:10:05,091 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-21 19:10:05,091 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-21 19:10:05,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:05,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:05,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:05,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:10:05,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:05,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:05,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2129656104, now seen corresponding path program 1 times [2024-06-21 19:10:05,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:05,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356701186] [2024-06-21 19:10:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:05,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:05,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356701186] [2024-06-21 19:10:05,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356701186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:05,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:05,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:10:05,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995698571] [2024-06-21 19:10:05,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:05,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:10:05,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:05,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:10:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:10:05,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:05,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:05,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:05,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:05,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:05,734 INFO L124 PetriNetUnfolderBase]: 159/291 cut-off events. [2024-06-21 19:10:05,735 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-21 19:10:05,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 291 events. 159/291 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 995 event pairs, 79 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 667. Up to 274 conditions per place. [2024-06-21 19:10:05,737 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2024-06-21 19:10:05,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 153 flow [2024-06-21 19:10:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:10:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:10:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-21 19:10:05,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-21 19:10:05,739 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 60 transitions. [2024-06-21 19:10:05,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 153 flow [2024-06-21 19:10:05,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:10:05,740 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-21 19:10:05,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-06-21 19:10:05,741 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-21 19:10:05,741 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-21 19:10:05,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:05,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:05,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:10:05,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:05,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1594830878, now seen corresponding path program 1 times [2024-06-21 19:10:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361454687] [2024-06-21 19:10:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361454687] [2024-06-21 19:10:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361454687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:06,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:06,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:10:06,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499819710] [2024-06-21 19:10:06,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:06,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:10:06,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:06,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:10:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:10:06,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:06,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:06,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:06,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:06,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:06,310 INFO L124 PetriNetUnfolderBase]: 153/281 cut-off events. [2024-06-21 19:10:06,310 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-21 19:10:06,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 281 events. 153/281 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 948 event pairs, 43 based on Foata normal form. 4/284 useless extension candidates. Maximal degree in co-relation 714. Up to 246 conditions per place. [2024-06-21 19:10:06,312 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 30 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-06-21 19:10:06,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 205 flow [2024-06-21 19:10:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:10:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:10:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-06-21 19:10:06,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2024-06-21 19:10:06,314 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 5 states and 74 transitions. [2024-06-21 19:10:06,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 205 flow [2024-06-21 19:10:06,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 196 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:10:06,315 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 115 flow [2024-06-21 19:10:06,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-06-21 19:10:06,316 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-06-21 19:10:06,316 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 115 flow [2024-06-21 19:10:06,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:06,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:06,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:06,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:10:06,317 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:06,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1527310829, now seen corresponding path program 1 times [2024-06-21 19:10:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922372092] [2024-06-21 19:10:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:07,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:07,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922372092] [2024-06-21 19:10:07,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922372092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:07,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:07,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:10:07,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267012863] [2024-06-21 19:10:07,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:07,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:10:07,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:07,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:10:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:10:07,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:07,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:07,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:07,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:07,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:07,459 INFO L124 PetriNetUnfolderBase]: 149/273 cut-off events. [2024-06-21 19:10:07,459 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-06-21 19:10:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 273 events. 149/273 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 906 event pairs, 24 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 756. Up to 220 conditions per place. [2024-06-21 19:10:07,461 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-06-21 19:10:07,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 219 flow [2024-06-21 19:10:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:10:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:10:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-21 19:10:07,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2024-06-21 19:10:07,463 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 115 flow. Second operand 6 states and 82 transitions. [2024-06-21 19:10:07,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 219 flow [2024-06-21 19:10:07,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 204 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:07,465 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 112 flow [2024-06-21 19:10:07,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2024-06-21 19:10:07,466 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-21 19:10:07,466 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 112 flow [2024-06-21 19:10:07,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:07,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:07,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:07,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:10:07,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:07,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2119854161, now seen corresponding path program 1 times [2024-06-21 19:10:07,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:07,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445822926] [2024-06-21 19:10:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:07,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:08,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:08,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445822926] [2024-06-21 19:10:08,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445822926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:08,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:08,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:10:08,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769243407] [2024-06-21 19:10:08,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:08,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:10:08,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:10:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:10:08,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:08,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:08,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:08,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:08,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:08,237 INFO L124 PetriNetUnfolderBase]: 147/273 cut-off events. [2024-06-21 19:10:08,237 INFO L125 PetriNetUnfolderBase]: For 422/422 co-relation queries the response was YES. [2024-06-21 19:10:08,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 273 events. 147/273 cut-off events. For 422/422 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 907 event pairs, 90 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 783. Up to 259 conditions per place. [2024-06-21 19:10:08,239 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 24 selfloop transitions, 8 changer transitions 0/34 dead transitions. [2024-06-21 19:10:08,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 202 flow [2024-06-21 19:10:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:10:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:10:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2024-06-21 19:10:08,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390804597701149 [2024-06-21 19:10:08,240 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 112 flow. Second operand 6 states and 59 transitions. [2024-06-21 19:10:08,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 202 flow [2024-06-21 19:10:08,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 180 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:08,242 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 136 flow [2024-06-21 19:10:08,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-21 19:10:08,243 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2024-06-21 19:10:08,243 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 136 flow [2024-06-21 19:10:08,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:08,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:08,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:08,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:10:08,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:08,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:08,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1290970441, now seen corresponding path program 1 times [2024-06-21 19:10:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090759199] [2024-06-21 19:10:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:08,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:08,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:08,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090759199] [2024-06-21 19:10:08,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090759199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:08,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:08,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:10:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904883962] [2024-06-21 19:10:08,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:08,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:10:08,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:10:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:10:09,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:09,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:09,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:09,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:09,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:09,211 INFO L124 PetriNetUnfolderBase]: 145/270 cut-off events. [2024-06-21 19:10:09,211 INFO L125 PetriNetUnfolderBase]: For 500/500 co-relation queries the response was YES. [2024-06-21 19:10:09,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 836 conditions, 270 events. 145/270 cut-off events. For 500/500 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 906 event pairs, 89 based on Foata normal form. 1/270 useless extension candidates. Maximal degree in co-relation 816. Up to 253 conditions per place. [2024-06-21 19:10:09,213 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 25 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2024-06-21 19:10:09,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 222 flow [2024-06-21 19:10:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:10:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:10:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-06-21 19:10:09,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 19:10:09,215 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 136 flow. Second operand 6 states and 60 transitions. [2024-06-21 19:10:09,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 222 flow [2024-06-21 19:10:09,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 209 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:09,216 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 159 flow [2024-06-21 19:10:09,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-06-21 19:10:09,217 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 15 predicate places. [2024-06-21 19:10:09,217 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 159 flow [2024-06-21 19:10:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:09,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:09,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:10:09,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:09,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1114402754, now seen corresponding path program 1 times [2024-06-21 19:10:09,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:09,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547049077] [2024-06-21 19:10:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:09,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:09,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547049077] [2024-06-21 19:10:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547049077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:09,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:09,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:10:09,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359392738] [2024-06-21 19:10:09,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:10:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:10:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:10:09,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:09,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:09,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:09,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:09,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:09,938 INFO L124 PetriNetUnfolderBase]: 152/283 cut-off events. [2024-06-21 19:10:09,938 INFO L125 PetriNetUnfolderBase]: For 653/653 co-relation queries the response was YES. [2024-06-21 19:10:09,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 283 events. 152/283 cut-off events. For 653/653 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 953 event pairs, 80 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 916. Up to 257 conditions per place. [2024-06-21 19:10:09,940 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 32 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-06-21 19:10:09,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 293 flow [2024-06-21 19:10:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 19:10:09,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-21 19:10:09,941 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 159 flow. Second operand 7 states and 73 transitions. [2024-06-21 19:10:09,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 293 flow [2024-06-21 19:10:09,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 277 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:09,943 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 205 flow [2024-06-21 19:10:09,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-06-21 19:10:09,944 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-06-21 19:10:09,944 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 205 flow [2024-06-21 19:10:09,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:09,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:09,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:09,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:10:09,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:09,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash -883309666, now seen corresponding path program 2 times [2024-06-21 19:10:09,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:09,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682739100] [2024-06-21 19:10:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:10,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:10,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682739100] [2024-06-21 19:10:10,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682739100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:10,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:10,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:10:10,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429971735] [2024-06-21 19:10:10,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:10:10,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:10,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:10:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:10:10,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:10,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:10,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:10,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:10,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:10,700 INFO L124 PetriNetUnfolderBase]: 155/288 cut-off events. [2024-06-21 19:10:10,700 INFO L125 PetriNetUnfolderBase]: For 883/883 co-relation queries the response was YES. [2024-06-21 19:10:10,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 288 events. 155/288 cut-off events. For 883/883 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 982 event pairs, 81 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 1018. Up to 262 conditions per place. [2024-06-21 19:10:10,702 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 31 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2024-06-21 19:10:10,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 330 flow [2024-06-21 19:10:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:10:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:10:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-06-21 19:10:10,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735632183908046 [2024-06-21 19:10:10,703 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 205 flow. Second operand 6 states and 65 transitions. [2024-06-21 19:10:10,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 330 flow [2024-06-21 19:10:10,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 303 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:10,705 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 234 flow [2024-06-21 19:10:10,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-21 19:10:10,706 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 21 predicate places. [2024-06-21 19:10:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 234 flow [2024-06-21 19:10:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:10,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:10,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:10,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:10:10,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:10,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:10,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1365370992, now seen corresponding path program 3 times [2024-06-21 19:10:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:10,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157401576] [2024-06-21 19:10:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:11,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:11,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157401576] [2024-06-21 19:10:11,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157401576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:11,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:11,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:10:11,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595009643] [2024-06-21 19:10:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:11,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:10:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:10:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:10:11,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:11,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 234 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:11,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:11,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:11,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:11,487 INFO L124 PetriNetUnfolderBase]: 153/286 cut-off events. [2024-06-21 19:10:11,487 INFO L125 PetriNetUnfolderBase]: For 1114/1114 co-relation queries the response was YES. [2024-06-21 19:10:11,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 286 events. 153/286 cut-off events. For 1114/1114 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 975 event pairs, 83 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 1058. Up to 250 conditions per place. [2024-06-21 19:10:11,489 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 27 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-06-21 19:10:11,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 352 flow [2024-06-21 19:10:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:10:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:10:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-06-21 19:10:11,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735632183908046 [2024-06-21 19:10:11,490 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 234 flow. Second operand 6 states and 65 transitions. [2024-06-21 19:10:11,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 352 flow [2024-06-21 19:10:11,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 330 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 19:10:11,492 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 273 flow [2024-06-21 19:10:11,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-06-21 19:10:11,493 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-21 19:10:11,493 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 273 flow [2024-06-21 19:10:11,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:11,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:11,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:11,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:10:11,494 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:11,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1864080268, now seen corresponding path program 1 times [2024-06-21 19:10:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117532011] [2024-06-21 19:10:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:11,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:12,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:12,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117532011] [2024-06-21 19:10:12,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117532011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:12,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:12,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:12,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466403287] [2024-06-21 19:10:12,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:12,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:12,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:12,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:12,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 273 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:12,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:12,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:12,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:12,624 INFO L124 PetriNetUnfolderBase]: 151/281 cut-off events. [2024-06-21 19:10:12,624 INFO L125 PetriNetUnfolderBase]: For 1328/1328 co-relation queries the response was YES. [2024-06-21 19:10:12,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 281 events. 151/281 cut-off events. For 1328/1328 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 952 event pairs, 84 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 1099. Up to 261 conditions per place. [2024-06-21 19:10:12,626 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 19:10:12,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 49 transitions, 389 flow [2024-06-21 19:10:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2024-06-21 19:10:12,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33497536945812806 [2024-06-21 19:10:12,627 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 273 flow. Second operand 7 states and 68 transitions. [2024-06-21 19:10:12,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 49 transitions, 389 flow [2024-06-21 19:10:12,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 344 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:12,631 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 269 flow [2024-06-21 19:10:12,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-06-21 19:10:12,634 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-21 19:10:12,634 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 269 flow [2024-06-21 19:10:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:12,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:12,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:12,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:10:12,635 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:12,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash -498187512, now seen corresponding path program 1 times [2024-06-21 19:10:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:12,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93211179] [2024-06-21 19:10:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:12,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:13,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93211179] [2024-06-21 19:10:13,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93211179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:13,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:13,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:13,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441737947] [2024-06-21 19:10:13,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:13,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:13,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:13,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:13,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:13,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:13,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:13,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:13,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:13,401 INFO L124 PetriNetUnfolderBase]: 158/293 cut-off events. [2024-06-21 19:10:13,401 INFO L125 PetriNetUnfolderBase]: For 1529/1529 co-relation queries the response was YES. [2024-06-21 19:10:13,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 293 events. 158/293 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1003 event pairs, 37 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 1162. Up to 242 conditions per place. [2024-06-21 19:10:13,403 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 43 selfloop transitions, 19 changer transitions 0/64 dead transitions. [2024-06-21 19:10:13,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 461 flow [2024-06-21 19:10:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 19:10:13,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 19:10:13,404 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 269 flow. Second operand 8 states and 85 transitions. [2024-06-21 19:10:13,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 461 flow [2024-06-21 19:10:13,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 436 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:13,407 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 329 flow [2024-06-21 19:10:13,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2024-06-21 19:10:13,408 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2024-06-21 19:10:13,408 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 329 flow [2024-06-21 19:10:13,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:13,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:13,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:13,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:10:13,409 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:13,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -203501182, now seen corresponding path program 2 times [2024-06-21 19:10:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:13,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635805185] [2024-06-21 19:10:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:13,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635805185] [2024-06-21 19:10:13,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635805185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:13,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:13,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729713130] [2024-06-21 19:10:13,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:13,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:13,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:13,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:13,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:13,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:13,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:14,167 INFO L124 PetriNetUnfolderBase]: 169/312 cut-off events. [2024-06-21 19:10:14,168 INFO L125 PetriNetUnfolderBase]: For 1858/1858 co-relation queries the response was YES. [2024-06-21 19:10:14,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 312 events. 169/312 cut-off events. For 1858/1858 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1111 event pairs, 35 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 1330. Up to 254 conditions per place. [2024-06-21 19:10:14,170 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 46 selfloop transitions, 21 changer transitions 0/69 dead transitions. [2024-06-21 19:10:14,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 543 flow [2024-06-21 19:10:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 19:10:14,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-06-21 19:10:14,172 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 329 flow. Second operand 8 states and 86 transitions. [2024-06-21 19:10:14,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 543 flow [2024-06-21 19:10:14,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 525 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 19:10:14,175 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 428 flow [2024-06-21 19:10:14,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=428, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2024-06-21 19:10:14,176 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-21 19:10:14,176 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 428 flow [2024-06-21 19:10:14,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:14,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:14,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:14,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:10:14,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:14,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:14,177 INFO L85 PathProgramCache]: Analyzing trace with hash 326597038, now seen corresponding path program 3 times [2024-06-21 19:10:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:14,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098090535] [2024-06-21 19:10:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:14,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:14,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098090535] [2024-06-21 19:10:14,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098090535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:14,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:14,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138901660] [2024-06-21 19:10:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:14,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:14,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:14,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:14,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:14,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:14,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 428 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:14,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:14,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:14,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:15,018 INFO L124 PetriNetUnfolderBase]: 177/326 cut-off events. [2024-06-21 19:10:15,018 INFO L125 PetriNetUnfolderBase]: For 2467/2467 co-relation queries the response was YES. [2024-06-21 19:10:15,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 326 events. 177/326 cut-off events. For 2467/2467 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1161 event pairs, 36 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 1521. Up to 254 conditions per place. [2024-06-21 19:10:15,020 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 27 changer transitions 0/73 dead transitions. [2024-06-21 19:10:15,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 660 flow [2024-06-21 19:10:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 19:10:15,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 19:10:15,021 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 428 flow. Second operand 8 states and 88 transitions. [2024-06-21 19:10:15,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 660 flow [2024-06-21 19:10:15,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 626 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:15,027 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 509 flow [2024-06-21 19:10:15,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=509, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2024-06-21 19:10:15,028 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-21 19:10:15,029 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 509 flow [2024-06-21 19:10:15,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:15,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:15,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:10:15,029 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:15,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash -203381026, now seen corresponding path program 1 times [2024-06-21 19:10:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:15,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480198509] [2024-06-21 19:10:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:15,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:15,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:15,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480198509] [2024-06-21 19:10:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480198509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:15,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681829650] [2024-06-21 19:10:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:15,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:15,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:15,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:15,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 509 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:15,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:15,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:15,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:15,846 INFO L124 PetriNetUnfolderBase]: 180/332 cut-off events. [2024-06-21 19:10:15,847 INFO L125 PetriNetUnfolderBase]: For 2951/2951 co-relation queries the response was YES. [2024-06-21 19:10:15,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 332 events. 180/332 cut-off events. For 2951/2951 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1184 event pairs, 57 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 1646. Up to 297 conditions per place. [2024-06-21 19:10:15,849 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 54 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-21 19:10:15,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 683 flow [2024-06-21 19:10:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 19:10:15,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2024-06-21 19:10:15,851 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 509 flow. Second operand 7 states and 79 transitions. [2024-06-21 19:10:15,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 683 flow [2024-06-21 19:10:15,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 644 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:15,856 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 526 flow [2024-06-21 19:10:15,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-06-21 19:10:15,857 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 49 predicate places. [2024-06-21 19:10:15,857 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 526 flow [2024-06-21 19:10:15,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:15,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:15,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:15,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:10:15,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:15,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1945234408, now seen corresponding path program 4 times [2024-06-21 19:10:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:15,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247897967] [2024-06-21 19:10:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247897967] [2024-06-21 19:10:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247897967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:16,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:16,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:16,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120786165] [2024-06-21 19:10:16,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:16,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:16,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:16,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:16,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:16,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:16,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:16,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:16,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:16,710 INFO L124 PetriNetUnfolderBase]: 183/335 cut-off events. [2024-06-21 19:10:16,711 INFO L125 PetriNetUnfolderBase]: For 3228/3228 co-relation queries the response was YES. [2024-06-21 19:10:16,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 335 events. 183/335 cut-off events. For 3228/3228 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1186 event pairs, 39 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 1739. Up to 277 conditions per place. [2024-06-21 19:10:16,713 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 22 changer transitions 0/76 dead transitions. [2024-06-21 19:10:16,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 76 transitions, 738 flow [2024-06-21 19:10:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-21 19:10:16,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-06-21 19:10:16,714 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 526 flow. Second operand 8 states and 84 transitions. [2024-06-21 19:10:16,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 76 transitions, 738 flow [2024-06-21 19:10:16,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 700 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:16,719 INFO L231 Difference]: Finished difference. Result has 81 places, 68 transitions, 588 flow [2024-06-21 19:10:16,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2024-06-21 19:10:16,720 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-21 19:10:16,720 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 588 flow [2024-06-21 19:10:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:16,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:16,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:16,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:10:16,721 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:16,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2100482150, now seen corresponding path program 5 times [2024-06-21 19:10:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:16,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985773791] [2024-06-21 19:10:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:16,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:17,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:17,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985773791] [2024-06-21 19:10:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985773791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:17,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893880562] [2024-06-21 19:10:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:17,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:17,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:17,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 588 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:17,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:17,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:17,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:17,541 INFO L124 PetriNetUnfolderBase]: 191/348 cut-off events. [2024-06-21 19:10:17,541 INFO L125 PetriNetUnfolderBase]: For 3926/3926 co-relation queries the response was YES. [2024-06-21 19:10:17,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 348 events. 191/348 cut-off events. For 3926/3926 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1243 event pairs, 39 based on Foata normal form. 1/345 useless extension candidates. Maximal degree in co-relation 1903. Up to 280 conditions per place. [2024-06-21 19:10:17,543 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 26 changer transitions 0/80 dead transitions. [2024-06-21 19:10:17,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 846 flow [2024-06-21 19:10:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 19:10:17,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-06-21 19:10:17,545 INFO L175 Difference]: Start difference. First operand has 81 places, 68 transitions, 588 flow. Second operand 7 states and 82 transitions. [2024-06-21 19:10:17,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 846 flow [2024-06-21 19:10:17,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 80 transitions, 798 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:17,550 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 664 flow [2024-06-21 19:10:17,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=664, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2024-06-21 19:10:17,550 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-21 19:10:17,550 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 664 flow [2024-06-21 19:10:17,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:17,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:17,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:10:17,551 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:17,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -623171504, now seen corresponding path program 6 times [2024-06-21 19:10:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:17,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063829509] [2024-06-21 19:10:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:18,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:18,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063829509] [2024-06-21 19:10:18,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063829509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:18,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:18,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:18,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011383324] [2024-06-21 19:10:18,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:18,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:18,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:18,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:18,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 664 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:18,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:18,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:18,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:18,400 INFO L124 PetriNetUnfolderBase]: 189/345 cut-off events. [2024-06-21 19:10:18,400 INFO L125 PetriNetUnfolderBase]: For 4463/4463 co-relation queries the response was YES. [2024-06-21 19:10:18,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 345 events. 189/345 cut-off events. For 4463/4463 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1240 event pairs, 44 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 1951. Up to 252 conditions per place. [2024-06-21 19:10:18,402 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 40 selfloop transitions, 39 changer transitions 0/81 dead transitions. [2024-06-21 19:10:18,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 902 flow [2024-06-21 19:10:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 19:10:18,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 19:10:18,404 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 664 flow. Second operand 8 states and 85 transitions. [2024-06-21 19:10:18,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 902 flow [2024-06-21 19:10:18,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 81 transitions, 850 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:18,410 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 731 flow [2024-06-21 19:10:18,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=731, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-06-21 19:10:18,411 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-06-21 19:10:18,411 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 731 flow [2024-06-21 19:10:18,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:18,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:18,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:10:18,411 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:18,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash -623171318, now seen corresponding path program 2 times [2024-06-21 19:10:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:18,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477995353] [2024-06-21 19:10:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:19,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:19,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477995353] [2024-06-21 19:10:19,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477995353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:19,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:19,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:19,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103976934] [2024-06-21 19:10:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:19,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:19,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:19,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 731 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:19,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:19,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:19,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:19,181 INFO L124 PetriNetUnfolderBase]: 192/352 cut-off events. [2024-06-21 19:10:19,181 INFO L125 PetriNetUnfolderBase]: For 4972/4972 co-relation queries the response was YES. [2024-06-21 19:10:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2113 conditions, 352 events. 192/352 cut-off events. For 4972/4972 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1273 event pairs, 60 based on Foata normal form. 1/351 useless extension candidates. Maximal degree in co-relation 2068. Up to 301 conditions per place. [2024-06-21 19:10:19,184 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 63 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-21 19:10:19,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 85 transitions, 983 flow [2024-06-21 19:10:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:10:19,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:10:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-06-21 19:10:19,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2024-06-21 19:10:19,185 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 731 flow. Second operand 6 states and 75 transitions. [2024-06-21 19:10:19,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 85 transitions, 983 flow [2024-06-21 19:10:19,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 880 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:19,192 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 713 flow [2024-06-21 19:10:19,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=713, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2024-06-21 19:10:19,192 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-06-21 19:10:19,192 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 713 flow [2024-06-21 19:10:19,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:19,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:19,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:10:19,193 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:19,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash -622934168, now seen corresponding path program 3 times [2024-06-21 19:10:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:19,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760166876] [2024-06-21 19:10:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:19,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760166876] [2024-06-21 19:10:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760166876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:19,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:19,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:19,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297637368] [2024-06-21 19:10:19,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:19,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:19,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:19,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:19,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:19,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 713 flow. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:19,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:19,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:19,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:20,132 INFO L124 PetriNetUnfolderBase]: 190/350 cut-off events. [2024-06-21 19:10:20,132 INFO L125 PetriNetUnfolderBase]: For 5145/5145 co-relation queries the response was YES. [2024-06-21 19:10:20,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 350 events. 190/350 cut-off events. For 5145/5145 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1279 event pairs, 66 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 2028. Up to 324 conditions per place. [2024-06-21 19:10:20,135 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 68 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-21 19:10:20,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 83 transitions, 887 flow [2024-06-21 19:10:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2024-06-21 19:10:20,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399014778325123 [2024-06-21 19:10:20,136 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 713 flow. Second operand 7 states and 69 transitions. [2024-06-21 19:10:20,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 83 transitions, 887 flow [2024-06-21 19:10:20,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 83 transitions, 844 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 19:10:20,148 INFO L231 Difference]: Finished difference. Result has 96 places, 78 transitions, 704 flow [2024-06-21 19:10:20,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=704, PETRI_PLACES=96, PETRI_TRANSITIONS=78} [2024-06-21 19:10:20,148 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-21 19:10:20,148 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 78 transitions, 704 flow [2024-06-21 19:10:20,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:20,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:20,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:20,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:10:20,149 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:20,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -622925240, now seen corresponding path program 1 times [2024-06-21 19:10:20,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:20,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577852233] [2024-06-21 19:10:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:20,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:21,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577852233] [2024-06-21 19:10:21,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577852233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:21,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:21,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:21,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913353402] [2024-06-21 19:10:21,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:21,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:21,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:21,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:21,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:21,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 78 transitions, 704 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:21,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:21,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:21,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:21,714 INFO L124 PetriNetUnfolderBase]: 187/345 cut-off events. [2024-06-21 19:10:21,714 INFO L125 PetriNetUnfolderBase]: For 5434/5434 co-relation queries the response was YES. [2024-06-21 19:10:21,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 345 events. 187/345 cut-off events. For 5434/5434 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1252 event pairs, 65 based on Foata normal form. 2/346 useless extension candidates. Maximal degree in co-relation 1996. Up to 316 conditions per place. [2024-06-21 19:10:21,724 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 71 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-21 19:10:21,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 85 transitions, 886 flow [2024-06-21 19:10:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2024-06-21 19:10:21,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3232758620689655 [2024-06-21 19:10:21,725 INFO L175 Difference]: Start difference. First operand has 96 places, 78 transitions, 704 flow. Second operand 8 states and 75 transitions. [2024-06-21 19:10:21,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 85 transitions, 886 flow [2024-06-21 19:10:21,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 860 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:21,733 INFO L231 Difference]: Finished difference. Result has 98 places, 78 transitions, 706 flow [2024-06-21 19:10:21,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=706, PETRI_PLACES=98, PETRI_TRANSITIONS=78} [2024-06-21 19:10:21,734 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 70 predicate places. [2024-06-21 19:10:21,734 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 78 transitions, 706 flow [2024-06-21 19:10:21,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:21,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:21,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:21,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:10:21,734 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:21,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:21,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1982847809, now seen corresponding path program 1 times [2024-06-21 19:10:21,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:21,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633452358] [2024-06-21 19:10:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:21,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:22,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:22,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633452358] [2024-06-21 19:10:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633452358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:22,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:22,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915210723] [2024-06-21 19:10:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:22,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:22,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:22,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 78 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:22,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:22,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:22,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:22,694 INFO L124 PetriNetUnfolderBase]: 194/356 cut-off events. [2024-06-21 19:10:22,694 INFO L125 PetriNetUnfolderBase]: For 5762/5762 co-relation queries the response was YES. [2024-06-21 19:10:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143 conditions, 356 events. 194/356 cut-off events. For 5762/5762 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1289 event pairs, 50 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 2094. Up to 291 conditions per place. [2024-06-21 19:10:22,697 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 66 selfloop transitions, 26 changer transitions 0/94 dead transitions. [2024-06-21 19:10:22,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 94 transitions, 967 flow [2024-06-21 19:10:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 19:10:22,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:10:22,698 INFO L175 Difference]: Start difference. First operand has 98 places, 78 transitions, 706 flow. Second operand 8 states and 87 transitions. [2024-06-21 19:10:22,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 94 transitions, 967 flow [2024-06-21 19:10:22,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 94 transitions, 937 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:22,707 INFO L231 Difference]: Finished difference. Result has 100 places, 82 transitions, 785 flow [2024-06-21 19:10:22,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=785, PETRI_PLACES=100, PETRI_TRANSITIONS=82} [2024-06-21 19:10:22,707 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2024-06-21 19:10:22,707 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 82 transitions, 785 flow [2024-06-21 19:10:22,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:22,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:22,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:22,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:10:22,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:22,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:22,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1736075802, now seen corresponding path program 1 times [2024-06-21 19:10:22,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:22,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113305349] [2024-06-21 19:10:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:22,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:23,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:23,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113305349] [2024-06-21 19:10:23,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113305349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:23,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:23,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:23,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085272026] [2024-06-21 19:10:23,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:23,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:23,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:23,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:23,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 82 transitions, 785 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:23,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:23,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:23,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:23,427 INFO L124 PetriNetUnfolderBase]: 206/374 cut-off events. [2024-06-21 19:10:23,427 INFO L125 PetriNetUnfolderBase]: For 6691/6691 co-relation queries the response was YES. [2024-06-21 19:10:23,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 374 events. 206/374 cut-off events. For 6691/6691 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1368 event pairs, 35 based on Foata normal form. 2/375 useless extension candidates. Maximal degree in co-relation 2282. Up to 287 conditions per place. [2024-06-21 19:10:23,430 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 66 selfloop transitions, 30 changer transitions 0/99 dead transitions. [2024-06-21 19:10:23,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 99 transitions, 1109 flow [2024-06-21 19:10:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-21 19:10:23,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-06-21 19:10:23,431 INFO L175 Difference]: Start difference. First operand has 100 places, 82 transitions, 785 flow. Second operand 7 states and 95 transitions. [2024-06-21 19:10:23,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 99 transitions, 1109 flow [2024-06-21 19:10:23,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 1047 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:23,440 INFO L231 Difference]: Finished difference. Result has 102 places, 86 transitions, 851 flow [2024-06-21 19:10:23,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=102, PETRI_TRANSITIONS=86} [2024-06-21 19:10:23,441 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 74 predicate places. [2024-06-21 19:10:23,441 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 86 transitions, 851 flow [2024-06-21 19:10:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:23,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:23,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:10:23,442 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:23,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1719422137, now seen corresponding path program 2 times [2024-06-21 19:10:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:23,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552027544] [2024-06-21 19:10:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:24,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552027544] [2024-06-21 19:10:24,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552027544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:24,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:24,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:24,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873996621] [2024-06-21 19:10:24,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:24,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:24,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:24,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:24,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 86 transitions, 851 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:24,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:24,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:24,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:24,531 INFO L124 PetriNetUnfolderBase]: 209/380 cut-off events. [2024-06-21 19:10:24,532 INFO L125 PetriNetUnfolderBase]: For 7393/7393 co-relation queries the response was YES. [2024-06-21 19:10:24,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 380 events. 209/380 cut-off events. For 7393/7393 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1408 event pairs, 36 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 2414. Up to 316 conditions per place. [2024-06-21 19:10:24,535 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-21 19:10:24,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 1116 flow [2024-06-21 19:10:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 19:10:24,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-06-21 19:10:24,536 INFO L175 Difference]: Start difference. First operand has 102 places, 86 transitions, 851 flow. Second operand 8 states and 86 transitions. [2024-06-21 19:10:24,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 1116 flow [2024-06-21 19:10:24,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 100 transitions, 1072 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:24,547 INFO L231 Difference]: Finished difference. Result has 107 places, 88 transitions, 910 flow [2024-06-21 19:10:24,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=107, PETRI_TRANSITIONS=88} [2024-06-21 19:10:24,548 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 79 predicate places. [2024-06-21 19:10:24,548 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 88 transitions, 910 flow [2024-06-21 19:10:24,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:24,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:24,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:24,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:10:24,549 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:24,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1547851707, now seen corresponding path program 3 times [2024-06-21 19:10:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:24,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59483414] [2024-06-21 19:10:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:25,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:25,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59483414] [2024-06-21 19:10:25,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59483414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:25,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:25,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999587092] [2024-06-21 19:10:25,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:25,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:25,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:25,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:25,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:25,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 88 transitions, 910 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:25,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:25,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:25,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:25,631 INFO L124 PetriNetUnfolderBase]: 207/376 cut-off events. [2024-06-21 19:10:25,631 INFO L125 PetriNetUnfolderBase]: For 7722/7722 co-relation queries the response was YES. [2024-06-21 19:10:25,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 376 events. 207/376 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1377 event pairs, 31 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 2420. Up to 313 conditions per place. [2024-06-21 19:10:25,635 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 25 changer transitions 0/99 dead transitions. [2024-06-21 19:10:25,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 99 transitions, 1134 flow [2024-06-21 19:10:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 19:10:25,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 19:10:25,637 INFO L175 Difference]: Start difference. First operand has 107 places, 88 transitions, 910 flow. Second operand 8 states and 88 transitions. [2024-06-21 19:10:25,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 99 transitions, 1134 flow [2024-06-21 19:10:25,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 99 transitions, 1054 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:25,648 INFO L231 Difference]: Finished difference. Result has 109 places, 88 transitions, 888 flow [2024-06-21 19:10:25,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=109, PETRI_TRANSITIONS=88} [2024-06-21 19:10:25,648 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 81 predicate places. [2024-06-21 19:10:25,649 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 88 transitions, 888 flow [2024-06-21 19:10:25,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:25,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:25,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:25,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:10:25,649 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:25,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:25,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2013568611, now seen corresponding path program 4 times [2024-06-21 19:10:25,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:25,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782191181] [2024-06-21 19:10:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:25,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:26,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:26,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782191181] [2024-06-21 19:10:26,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782191181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:26,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:26,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:26,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653117658] [2024-06-21 19:10:26,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:26,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:26,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:26,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:26,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:26,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:26,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 88 transitions, 888 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:26,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:26,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:26,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:26,739 INFO L124 PetriNetUnfolderBase]: 210/381 cut-off events. [2024-06-21 19:10:26,740 INFO L125 PetriNetUnfolderBase]: For 8323/8323 co-relation queries the response was YES. [2024-06-21 19:10:26,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 381 events. 210/381 cut-off events. For 8323/8323 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1403 event pairs, 33 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 2462. Up to 318 conditions per place. [2024-06-21 19:10:26,743 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 74 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-21 19:10:26,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 101 transitions, 1157 flow [2024-06-21 19:10:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 19:10:26,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:10:26,744 INFO L175 Difference]: Start difference. First operand has 109 places, 88 transitions, 888 flow. Second operand 8 states and 87 transitions. [2024-06-21 19:10:26,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 101 transitions, 1157 flow [2024-06-21 19:10:26,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 101 transitions, 1094 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:26,755 INFO L231 Difference]: Finished difference. Result has 111 places, 90 transitions, 926 flow [2024-06-21 19:10:26,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=926, PETRI_PLACES=111, PETRI_TRANSITIONS=90} [2024-06-21 19:10:26,756 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 83 predicate places. [2024-06-21 19:10:26,756 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 90 transitions, 926 flow [2024-06-21 19:10:26,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:26,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:26,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:26,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:10:26,756 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:26,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2009849386, now seen corresponding path program 2 times [2024-06-21 19:10:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993527193] [2024-06-21 19:10:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:27,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:27,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993527193] [2024-06-21 19:10:27,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993527193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:27,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:27,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:27,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611051337] [2024-06-21 19:10:27,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:27,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:27,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:27,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:27,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:27,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:27,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 90 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:27,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:27,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:27,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:27,469 INFO L124 PetriNetUnfolderBase]: 237/425 cut-off events. [2024-06-21 19:10:27,469 INFO L125 PetriNetUnfolderBase]: For 10581/10581 co-relation queries the response was YES. [2024-06-21 19:10:27,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 425 events. 237/425 cut-off events. For 10581/10581 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1604 event pairs, 36 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 2843. Up to 270 conditions per place. [2024-06-21 19:10:27,474 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 71 selfloop transitions, 37 changer transitions 0/111 dead transitions. [2024-06-21 19:10:27,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 111 transitions, 1394 flow [2024-06-21 19:10:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 19:10:27,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-06-21 19:10:27,475 INFO L175 Difference]: Start difference. First operand has 111 places, 90 transitions, 926 flow. Second operand 7 states and 98 transitions. [2024-06-21 19:10:27,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 111 transitions, 1394 flow [2024-06-21 19:10:27,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 1324 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:27,489 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 1035 flow [2024-06-21 19:10:27,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1035, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2024-06-21 19:10:27,490 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 85 predicate places. [2024-06-21 19:10:27,490 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 1035 flow [2024-06-21 19:10:27,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:27,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:27,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:27,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:10:27,491 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:27,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2009843806, now seen corresponding path program 3 times [2024-06-21 19:10:27,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:27,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076806402] [2024-06-21 19:10:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:28,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:28,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076806402] [2024-06-21 19:10:28,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076806402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:28,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:28,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:28,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529437113] [2024-06-21 19:10:28,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:28,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:28,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:28,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:28,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:28,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:28,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 1035 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:28,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:28,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:28,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:28,253 INFO L124 PetriNetUnfolderBase]: 235/422 cut-off events. [2024-06-21 19:10:28,253 INFO L125 PetriNetUnfolderBase]: For 10934/10934 co-relation queries the response was YES. [2024-06-21 19:10:28,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 422 events. 235/422 cut-off events. For 10934/10934 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1589 event pairs, 35 based on Foata normal form. 1/422 useless extension candidates. Maximal degree in co-relation 2916. Up to 305 conditions per place. [2024-06-21 19:10:28,258 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 68 selfloop transitions, 43 changer transitions 0/113 dead transitions. [2024-06-21 19:10:28,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 113 transitions, 1448 flow [2024-06-21 19:10:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-21 19:10:28,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2024-06-21 19:10:28,261 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 1035 flow. Second operand 7 states and 90 transitions. [2024-06-21 19:10:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 113 transitions, 1448 flow [2024-06-21 19:10:28,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 113 transitions, 1388 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 19:10:28,277 INFO L231 Difference]: Finished difference. Result has 119 places, 102 transitions, 1152 flow [2024-06-21 19:10:28,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1152, PETRI_PLACES=119, PETRI_TRANSITIONS=102} [2024-06-21 19:10:28,278 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 91 predicate places. [2024-06-21 19:10:28,278 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 102 transitions, 1152 flow [2024-06-21 19:10:28,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:28,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:28,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:10:28,279 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:28,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2009843589, now seen corresponding path program 1 times [2024-06-21 19:10:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:28,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279375868] [2024-06-21 19:10:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:28,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:28,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279375868] [2024-06-21 19:10:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279375868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:28,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:28,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:10:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172171591] [2024-06-21 19:10:28,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:28,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:10:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:10:28,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:10:29,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:29,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 102 transitions, 1152 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:29,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:29,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:29,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:29,171 INFO L124 PetriNetUnfolderBase]: 245/439 cut-off events. [2024-06-21 19:10:29,171 INFO L125 PetriNetUnfolderBase]: For 12007/12007 co-relation queries the response was YES. [2024-06-21 19:10:29,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 439 events. 245/439 cut-off events. For 12007/12007 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1669 event pairs, 33 based on Foata normal form. 3/441 useless extension candidates. Maximal degree in co-relation 3045. Up to 261 conditions per place. [2024-06-21 19:10:29,175 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 63 selfloop transitions, 52 changer transitions 0/118 dead transitions. [2024-06-21 19:10:29,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 118 transitions, 1563 flow [2024-06-21 19:10:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 19:10:29,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-06-21 19:10:29,177 INFO L175 Difference]: Start difference. First operand has 119 places, 102 transitions, 1152 flow. Second operand 7 states and 98 transitions. [2024-06-21 19:10:29,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 118 transitions, 1563 flow [2024-06-21 19:10:29,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 118 transitions, 1476 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:29,193 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 1221 flow [2024-06-21 19:10:29,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1221, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2024-06-21 19:10:29,198 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 94 predicate places. [2024-06-21 19:10:29,199 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 1221 flow [2024-06-21 19:10:29,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:29,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:29,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:29,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:10:29,199 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:29,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2009849541, now seen corresponding path program 5 times [2024-06-21 19:10:29,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:29,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602508537] [2024-06-21 19:10:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:29,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:30,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:30,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602508537] [2024-06-21 19:10:30,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602508537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:30,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:30,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:30,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297093058] [2024-06-21 19:10:30,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:30,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:30,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:30,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:30,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 1221 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:30,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:30,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:30,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:30,383 INFO L124 PetriNetUnfolderBase]: 248/444 cut-off events. [2024-06-21 19:10:30,383 INFO L125 PetriNetUnfolderBase]: For 12301/12301 co-relation queries the response was YES. [2024-06-21 19:10:30,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3259 conditions, 444 events. 248/444 cut-off events. For 12301/12301 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1691 event pairs, 34 based on Foata normal form. 1/444 useless extension candidates. Maximal degree in co-relation 3199. Up to 360 conditions per place. [2024-06-21 19:10:30,390 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 81 selfloop transitions, 35 changer transitions 0/118 dead transitions. [2024-06-21 19:10:30,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 118 transitions, 1516 flow [2024-06-21 19:10:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 19:10:30,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 19:10:30,391 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 1221 flow. Second operand 8 states and 88 transitions. [2024-06-21 19:10:30,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 118 transitions, 1516 flow [2024-06-21 19:10:30,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 118 transitions, 1459 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:30,410 INFO L231 Difference]: Finished difference. Result has 127 places, 108 transitions, 1281 flow [2024-06-21 19:10:30,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1281, PETRI_PLACES=127, PETRI_TRANSITIONS=108} [2024-06-21 19:10:30,411 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2024-06-21 19:10:30,411 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 108 transitions, 1281 flow [2024-06-21 19:10:30,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:30,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:30,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:30,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:10:30,412 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:30,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:30,412 INFO L85 PathProgramCache]: Analyzing trace with hash 956601487, now seen corresponding path program 6 times [2024-06-21 19:10:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:30,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140470657] [2024-06-21 19:10:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:31,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140470657] [2024-06-21 19:10:31,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140470657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:31,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:31,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798381439] [2024-06-21 19:10:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:31,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:31,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 108 transitions, 1281 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:31,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:31,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:31,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:31,486 INFO L124 PetriNetUnfolderBase]: 243/436 cut-off events. [2024-06-21 19:10:31,486 INFO L125 PetriNetUnfolderBase]: For 12889/12889 co-relation queries the response was YES. [2024-06-21 19:10:31,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3160 conditions, 436 events. 243/436 cut-off events. For 12889/12889 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1667 event pairs, 37 based on Foata normal form. 2/434 useless extension candidates. Maximal degree in co-relation 3098. Up to 370 conditions per place. [2024-06-21 19:10:31,489 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 88 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-21 19:10:31,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 116 transitions, 1531 flow [2024-06-21 19:10:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 19:10:31,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 19:10:31,491 INFO L175 Difference]: Start difference. First operand has 127 places, 108 transitions, 1281 flow. Second operand 8 states and 85 transitions. [2024-06-21 19:10:31,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 116 transitions, 1531 flow [2024-06-21 19:10:31,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 1421 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:31,510 INFO L231 Difference]: Finished difference. Result has 129 places, 108 transitions, 1232 flow [2024-06-21 19:10:31,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1232, PETRI_PLACES=129, PETRI_TRANSITIONS=108} [2024-06-21 19:10:31,511 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 101 predicate places. [2024-06-21 19:10:31,511 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 108 transitions, 1232 flow [2024-06-21 19:10:31,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:31,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:31,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:31,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:10:31,511 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:31,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash 960410767, now seen corresponding path program 7 times [2024-06-21 19:10:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:31,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752690134] [2024-06-21 19:10:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:31,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:32,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:32,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752690134] [2024-06-21 19:10:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752690134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:32,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:32,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:32,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39236086] [2024-06-21 19:10:32,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:32,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:32,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 108 transitions, 1232 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:32,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:32,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:32,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:32,870 INFO L124 PetriNetUnfolderBase]: 240/431 cut-off events. [2024-06-21 19:10:32,871 INFO L125 PetriNetUnfolderBase]: For 12420/12420 co-relation queries the response was YES. [2024-06-21 19:10:32,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3072 conditions, 431 events. 240/431 cut-off events. For 12420/12420 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1649 event pairs, 37 based on Foata normal form. 1/428 useless extension candidates. Maximal degree in co-relation 3009. Up to 356 conditions per place. [2024-06-21 19:10:32,874 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 83 selfloop transitions, 30 changer transitions 0/115 dead transitions. [2024-06-21 19:10:32,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 115 transitions, 1476 flow [2024-06-21 19:10:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 19:10:32,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:10:32,875 INFO L175 Difference]: Start difference. First operand has 129 places, 108 transitions, 1232 flow. Second operand 8 states and 87 transitions. [2024-06-21 19:10:32,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 115 transitions, 1476 flow [2024-06-21 19:10:32,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 115 transitions, 1407 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:32,896 INFO L231 Difference]: Finished difference. Result has 132 places, 108 transitions, 1229 flow [2024-06-21 19:10:32,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1229, PETRI_PLACES=132, PETRI_TRANSITIONS=108} [2024-06-21 19:10:32,896 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 104 predicate places. [2024-06-21 19:10:32,897 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 108 transitions, 1229 flow [2024-06-21 19:10:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:32,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:32,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:32,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:10:32,897 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:32,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 372176914, now seen corresponding path program 4 times [2024-06-21 19:10:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:32,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80447879] [2024-06-21 19:10:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:32,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:33,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80447879] [2024-06-21 19:10:33,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80447879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:33,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:33,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:33,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805064064] [2024-06-21 19:10:33,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:33,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:33,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:33,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:33,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:33,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:33,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 108 transitions, 1229 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:33,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:33,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:33,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:33,805 INFO L124 PetriNetUnfolderBase]: 248/444 cut-off events. [2024-06-21 19:10:33,806 INFO L125 PetriNetUnfolderBase]: For 13651/13651 co-relation queries the response was YES. [2024-06-21 19:10:33,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 444 events. 248/444 cut-off events. For 13651/13651 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1715 event pairs, 41 based on Foata normal form. 1/441 useless extension candidates. Maximal degree in co-relation 3139. Up to 300 conditions per place. [2024-06-21 19:10:33,809 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 77 selfloop transitions, 45 changer transitions 0/124 dead transitions. [2024-06-21 19:10:33,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 124 transitions, 1759 flow [2024-06-21 19:10:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-21 19:10:33,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-06-21 19:10:33,810 INFO L175 Difference]: Start difference. First operand has 132 places, 108 transitions, 1229 flow. Second operand 7 states and 92 transitions. [2024-06-21 19:10:33,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 124 transitions, 1759 flow [2024-06-21 19:10:33,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 124 transitions, 1656 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:33,831 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 1303 flow [2024-06-21 19:10:33,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1303, PETRI_PLACES=132, PETRI_TRANSITIONS=114} [2024-06-21 19:10:33,831 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 104 predicate places. [2024-06-21 19:10:33,831 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 1303 flow [2024-06-21 19:10:33,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:33,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:33,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:33,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:10:33,832 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:33,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash 372177131, now seen corresponding path program 2 times [2024-06-21 19:10:33,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:33,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567305249] [2024-06-21 19:10:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567305249] [2024-06-21 19:10:34,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567305249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:34,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136293659] [2024-06-21 19:10:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:34,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:34,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 114 transitions, 1303 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:34,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:34,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:34,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:34,781 INFO L124 PetriNetUnfolderBase]: 259/463 cut-off events. [2024-06-21 19:10:34,782 INFO L125 PetriNetUnfolderBase]: For 15332/15332 co-relation queries the response was YES. [2024-06-21 19:10:34,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 463 events. 259/463 cut-off events. For 15332/15332 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1810 event pairs, 41 based on Foata normal form. 3/462 useless extension candidates. Maximal degree in co-relation 3299. Up to 306 conditions per place. [2024-06-21 19:10:34,784 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 79 selfloop transitions, 47 changer transitions 0/128 dead transitions. [2024-06-21 19:10:34,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 128 transitions, 1815 flow [2024-06-21 19:10:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-06-21 19:10:34,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630541871921182 [2024-06-21 19:10:34,786 INFO L175 Difference]: Start difference. First operand has 132 places, 114 transitions, 1303 flow. Second operand 7 states and 94 transitions. [2024-06-21 19:10:34,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 128 transitions, 1815 flow [2024-06-21 19:10:34,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 128 transitions, 1717 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 19:10:34,806 INFO L231 Difference]: Finished difference. Result has 136 places, 117 transitions, 1345 flow [2024-06-21 19:10:34,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=136, PETRI_TRANSITIONS=117} [2024-06-21 19:10:34,807 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 108 predicate places. [2024-06-21 19:10:34,807 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 117 transitions, 1345 flow [2024-06-21 19:10:34,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:34,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:34,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:34,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:10:34,808 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:34,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:34,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2131089320, now seen corresponding path program 5 times [2024-06-21 19:10:34,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:34,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573795199] [2024-06-21 19:10:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:34,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:35,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:35,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573795199] [2024-06-21 19:10:35,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573795199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:35,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:35,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:35,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168255322] [2024-06-21 19:10:35,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:35,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:35,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:35,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:35,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:35,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:35,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 117 transitions, 1345 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:35,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:35,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:35,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:35,766 INFO L124 PetriNetUnfolderBase]: 257/462 cut-off events. [2024-06-21 19:10:35,766 INFO L125 PetriNetUnfolderBase]: For 14797/14797 co-relation queries the response was YES. [2024-06-21 19:10:35,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3385 conditions, 462 events. 257/462 cut-off events. For 14797/14797 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1816 event pairs, 73 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 3321. Up to 431 conditions per place. [2024-06-21 19:10:35,769 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 104 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2024-06-21 19:10:35,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 123 transitions, 1601 flow [2024-06-21 19:10:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 78 transitions. [2024-06-21 19:10:35,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33620689655172414 [2024-06-21 19:10:35,770 INFO L175 Difference]: Start difference. First operand has 136 places, 117 transitions, 1345 flow. Second operand 8 states and 78 transitions. [2024-06-21 19:10:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 123 transitions, 1601 flow [2024-06-21 19:10:35,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 123 transitions, 1475 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:35,793 INFO L231 Difference]: Finished difference. Result has 139 places, 117 transitions, 1261 flow [2024-06-21 19:10:35,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1261, PETRI_PLACES=139, PETRI_TRANSITIONS=117} [2024-06-21 19:10:35,794 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 111 predicate places. [2024-06-21 19:10:35,794 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 117 transitions, 1261 flow [2024-06-21 19:10:35,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:35,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:35,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:35,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:10:35,795 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:35,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2130822193, now seen corresponding path program 3 times [2024-06-21 19:10:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580420793] [2024-06-21 19:10:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:36,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:36,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580420793] [2024-06-21 19:10:36,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580420793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:36,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:36,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:36,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482482390] [2024-06-21 19:10:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:36,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:36,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:36,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:36,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:36,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:36,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 117 transitions, 1261 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:36,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:36,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:36,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:37,154 INFO L124 PetriNetUnfolderBase]: 260/467 cut-off events. [2024-06-21 19:10:37,154 INFO L125 PetriNetUnfolderBase]: For 15378/15378 co-relation queries the response was YES. [2024-06-21 19:10:37,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3327 conditions, 467 events. 260/467 cut-off events. For 15378/15378 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1850 event pairs, 73 based on Foata normal form. 1/467 useless extension candidates. Maximal degree in co-relation 3261. Up to 432 conditions per place. [2024-06-21 19:10:37,158 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 108 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-21 19:10:37,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 129 transitions, 1653 flow [2024-06-21 19:10:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-21 19:10:37,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 19:10:37,159 INFO L175 Difference]: Start difference. First operand has 139 places, 117 transitions, 1261 flow. Second operand 9 states and 87 transitions. [2024-06-21 19:10:37,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 129 transitions, 1653 flow [2024-06-21 19:10:37,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 129 transitions, 1615 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:37,182 INFO L231 Difference]: Finished difference. Result has 141 places, 121 transitions, 1322 flow [2024-06-21 19:10:37,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1322, PETRI_PLACES=141, PETRI_TRANSITIONS=121} [2024-06-21 19:10:37,182 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 113 predicate places. [2024-06-21 19:10:37,182 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 121 transitions, 1322 flow [2024-06-21 19:10:37,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:37,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:37,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:37,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:10:37,183 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:37,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2138446550, now seen corresponding path program 6 times [2024-06-21 19:10:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384665468] [2024-06-21 19:10:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:37,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:37,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:37,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384665468] [2024-06-21 19:10:37,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384665468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:37,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:37,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:37,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884854488] [2024-06-21 19:10:37,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:37,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:37,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:37,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:37,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:37,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:37,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 121 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:37,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:37,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:37,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:38,036 INFO L124 PetriNetUnfolderBase]: 260/466 cut-off events. [2024-06-21 19:10:38,036 INFO L125 PetriNetUnfolderBase]: For 16203/16203 co-relation queries the response was YES. [2024-06-21 19:10:38,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3351 conditions, 466 events. 260/466 cut-off events. For 16203/16203 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1824 event pairs, 41 based on Foata normal form. 2/463 useless extension candidates. Maximal degree in co-relation 3284. Up to 272 conditions per place. [2024-06-21 19:10:38,040 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 82 selfloop transitions, 51 changer transitions 0/135 dead transitions. [2024-06-21 19:10:38,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 135 transitions, 1822 flow [2024-06-21 19:10:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-21 19:10:38,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-06-21 19:10:38,041 INFO L175 Difference]: Start difference. First operand has 141 places, 121 transitions, 1322 flow. Second operand 7 states and 92 transitions. [2024-06-21 19:10:38,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 135 transitions, 1822 flow [2024-06-21 19:10:38,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 135 transitions, 1764 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:38,069 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 1462 flow [2024-06-21 19:10:38,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1462, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2024-06-21 19:10:38,070 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2024-06-21 19:10:38,070 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 1462 flow [2024-06-21 19:10:38,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:38,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:38,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:38,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:10:38,071 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:38,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2138446705, now seen corresponding path program 8 times [2024-06-21 19:10:38,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:38,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424116706] [2024-06-21 19:10:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:38,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:39,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:39,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424116706] [2024-06-21 19:10:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424116706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:39,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:39,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679548601] [2024-06-21 19:10:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:39,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:39,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:39,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:39,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 1462 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:39,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:39,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:39,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:39,305 INFO L124 PetriNetUnfolderBase]: 257/460 cut-off events. [2024-06-21 19:10:39,305 INFO L125 PetriNetUnfolderBase]: For 16255/16255 co-relation queries the response was YES. [2024-06-21 19:10:39,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 460 events. 257/460 cut-off events. For 16255/16255 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1799 event pairs, 42 based on Foata normal form. 1/457 useless extension candidates. Maximal degree in co-relation 3340. Up to 346 conditions per place. [2024-06-21 19:10:39,309 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 82 selfloop transitions, 49 changer transitions 0/133 dead transitions. [2024-06-21 19:10:39,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 133 transitions, 1751 flow [2024-06-21 19:10:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 19:10:39,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 19:10:39,311 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 1462 flow. Second operand 8 states and 85 transitions. [2024-06-21 19:10:39,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 133 transitions, 1751 flow [2024-06-21 19:10:39,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 133 transitions, 1632 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:39,345 INFO L231 Difference]: Finished difference. Result has 148 places, 127 transitions, 1462 flow [2024-06-21 19:10:39,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1462, PETRI_PLACES=148, PETRI_TRANSITIONS=127} [2024-06-21 19:10:39,345 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 120 predicate places. [2024-06-21 19:10:39,345 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 127 transitions, 1462 flow [2024-06-21 19:10:39,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:39,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:39,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:39,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:10:39,346 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:39,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:39,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2131089103, now seen corresponding path program 4 times [2024-06-21 19:10:39,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:39,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873191773] [2024-06-21 19:10:39,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:39,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:40,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:40,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873191773] [2024-06-21 19:10:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873191773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:40,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:40,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107509328] [2024-06-21 19:10:40,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:40,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:40,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:40,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 127 transitions, 1462 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:40,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:40,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:40,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:40,468 INFO L124 PetriNetUnfolderBase]: 261/469 cut-off events. [2024-06-21 19:10:40,468 INFO L125 PetriNetUnfolderBase]: For 17463/17463 co-relation queries the response was YES. [2024-06-21 19:10:40,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3405 conditions, 469 events. 261/469 cut-off events. For 17463/17463 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1866 event pairs, 73 based on Foata normal form. 3/471 useless extension candidates. Maximal degree in co-relation 3334. Up to 429 conditions per place. [2024-06-21 19:10:40,471 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 115 selfloop transitions, 19 changer transitions 0/136 dead transitions. [2024-06-21 19:10:40,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 136 transitions, 1778 flow [2024-06-21 19:10:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-21 19:10:40,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2024-06-21 19:10:40,472 INFO L175 Difference]: Start difference. First operand has 148 places, 127 transitions, 1462 flow. Second operand 7 states and 75 transitions. [2024-06-21 19:10:40,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 136 transitions, 1778 flow [2024-06-21 19:10:40,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 136 transitions, 1646 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:40,527 INFO L231 Difference]: Finished difference. Result has 149 places, 129 transitions, 1400 flow [2024-06-21 19:10:40,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=149, PETRI_TRANSITIONS=129} [2024-06-21 19:10:40,527 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 121 predicate places. [2024-06-21 19:10:40,527 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 129 transitions, 1400 flow [2024-06-21 19:10:40,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:40,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:40,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:40,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:10:40,528 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:40,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash 124826921, now seen corresponding path program 1 times [2024-06-21 19:10:40,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:40,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494741436] [2024-06-21 19:10:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:40,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:41,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:41,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494741436] [2024-06-21 19:10:41,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494741436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:41,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:41,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342501001] [2024-06-21 19:10:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:41,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:41,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:41,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 129 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:41,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:41,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:41,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:41,417 INFO L124 PetriNetUnfolderBase]: 245/463 cut-off events. [2024-06-21 19:10:41,418 INFO L125 PetriNetUnfolderBase]: For 19347/19348 co-relation queries the response was YES. [2024-06-21 19:10:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 463 events. 245/463 cut-off events. For 19347/19348 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1970 event pairs, 22 based on Foata normal form. 2/462 useless extension candidates. Maximal degree in co-relation 3233. Up to 291 conditions per place. [2024-06-21 19:10:41,422 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 87 selfloop transitions, 25 changer transitions 0/144 dead transitions. [2024-06-21 19:10:41,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 144 transitions, 1688 flow [2024-06-21 19:10:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 19:10:41,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-21 19:10:41,423 INFO L175 Difference]: Start difference. First operand has 149 places, 129 transitions, 1400 flow. Second operand 8 states and 97 transitions. [2024-06-21 19:10:41,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 144 transitions, 1688 flow [2024-06-21 19:10:41,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 144 transitions, 1640 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:41,452 INFO L231 Difference]: Finished difference. Result has 152 places, 131 transitions, 1445 flow [2024-06-21 19:10:41,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1445, PETRI_PLACES=152, PETRI_TRANSITIONS=131} [2024-06-21 19:10:41,453 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 124 predicate places. [2024-06-21 19:10:41,453 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 131 transitions, 1445 flow [2024-06-21 19:10:41,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:41,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:41,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:41,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:10:41,453 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:41,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2001026305, now seen corresponding path program 2 times [2024-06-21 19:10:41,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:41,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281649945] [2024-06-21 19:10:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:41,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:42,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:42,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281649945] [2024-06-21 19:10:42,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281649945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:42,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:42,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:42,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332154985] [2024-06-21 19:10:42,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:42,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:42,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:42,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:42,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 131 transitions, 1445 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:42,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:42,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:42,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:42,628 INFO L124 PetriNetUnfolderBase]: 279/505 cut-off events. [2024-06-21 19:10:42,628 INFO L125 PetriNetUnfolderBase]: For 18945/18945 co-relation queries the response was YES. [2024-06-21 19:10:42,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3604 conditions, 505 events. 279/505 cut-off events. For 18945/18945 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2102 event pairs, 27 based on Foata normal form. 2/506 useless extension candidates. Maximal degree in co-relation 3531. Up to 430 conditions per place. [2024-06-21 19:10:42,632 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 123 selfloop transitions, 23 changer transitions 0/148 dead transitions. [2024-06-21 19:10:42,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 148 transitions, 1813 flow [2024-06-21 19:10:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 19:10:42,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 19:10:42,633 INFO L175 Difference]: Start difference. First operand has 152 places, 131 transitions, 1445 flow. Second operand 9 states and 96 transitions. [2024-06-21 19:10:42,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 148 transitions, 1813 flow [2024-06-21 19:10:42,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 148 transitions, 1753 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:42,666 INFO L231 Difference]: Finished difference. Result has 156 places, 133 transitions, 1477 flow [2024-06-21 19:10:42,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1477, PETRI_PLACES=156, PETRI_TRANSITIONS=133} [2024-06-21 19:10:42,667 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 128 predicate places. [2024-06-21 19:10:42,667 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 133 transitions, 1477 flow [2024-06-21 19:10:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:42,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:42,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:42,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:10:42,668 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:42,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1355373955, now seen corresponding path program 1 times [2024-06-21 19:10:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:42,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243961812] [2024-06-21 19:10:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:43,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243961812] [2024-06-21 19:10:43,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243961812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:43,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:43,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128892219] [2024-06-21 19:10:43,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:43,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:43,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:43,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 133 transitions, 1477 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:43,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:43,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:43,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:43,744 INFO L124 PetriNetUnfolderBase]: 277/504 cut-off events. [2024-06-21 19:10:43,744 INFO L125 PetriNetUnfolderBase]: For 17854/17854 co-relation queries the response was YES. [2024-06-21 19:10:43,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3524 conditions, 504 events. 277/504 cut-off events. For 17854/17854 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2125 event pairs, 47 based on Foata normal form. 1/504 useless extension candidates. Maximal degree in co-relation 3451. Up to 413 conditions per place. [2024-06-21 19:10:43,747 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 108 selfloop transitions, 35 changer transitions 0/145 dead transitions. [2024-06-21 19:10:43,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 145 transitions, 1806 flow [2024-06-21 19:10:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 19:10:43,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2024-06-21 19:10:43,749 INFO L175 Difference]: Start difference. First operand has 156 places, 133 transitions, 1477 flow. Second operand 7 states and 81 transitions. [2024-06-21 19:10:43,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 145 transitions, 1806 flow [2024-06-21 19:10:43,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 145 transitions, 1712 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:43,782 INFO L231 Difference]: Finished difference. Result has 157 places, 134 transitions, 1482 flow [2024-06-21 19:10:43,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1482, PETRI_PLACES=157, PETRI_TRANSITIONS=134} [2024-06-21 19:10:43,783 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2024-06-21 19:10:43,783 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 134 transitions, 1482 flow [2024-06-21 19:10:43,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:43,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:43,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:43,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:10:43,784 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:43,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:43,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2016373175, now seen corresponding path program 3 times [2024-06-21 19:10:43,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:43,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951374818] [2024-06-21 19:10:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:43,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951374818] [2024-06-21 19:10:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951374818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:44,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912880497] [2024-06-21 19:10:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:44,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:44,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:44,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 134 transitions, 1482 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:44,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:44,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:44,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:44,921 INFO L124 PetriNetUnfolderBase]: 281/511 cut-off events. [2024-06-21 19:10:44,921 INFO L125 PetriNetUnfolderBase]: For 19616/19616 co-relation queries the response was YES. [2024-06-21 19:10:44,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3582 conditions, 511 events. 281/511 cut-off events. For 19616/19616 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2144 event pairs, 33 based on Foata normal form. 2/512 useless extension candidates. Maximal degree in co-relation 3509. Up to 441 conditions per place. [2024-06-21 19:10:44,925 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 118 selfloop transitions, 29 changer transitions 0/149 dead transitions. [2024-06-21 19:10:44,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 149 transitions, 1844 flow [2024-06-21 19:10:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-21 19:10:44,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-21 19:10:44,939 INFO L175 Difference]: Start difference. First operand has 157 places, 134 transitions, 1482 flow. Second operand 9 states and 94 transitions. [2024-06-21 19:10:44,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 149 transitions, 1844 flow [2024-06-21 19:10:44,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 149 transitions, 1775 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:44,974 INFO L231 Difference]: Finished difference. Result has 161 places, 135 transitions, 1509 flow [2024-06-21 19:10:44,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1509, PETRI_PLACES=161, PETRI_TRANSITIONS=135} [2024-06-21 19:10:44,975 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 133 predicate places. [2024-06-21 19:10:44,975 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 135 transitions, 1509 flow [2024-06-21 19:10:44,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:44,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:44,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:10:44,976 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:44,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 738763427, now seen corresponding path program 4 times [2024-06-21 19:10:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:44,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285411970] [2024-06-21 19:10:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:44,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:45,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285411970] [2024-06-21 19:10:45,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285411970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:45,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:45,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:45,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110286330] [2024-06-21 19:10:45,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:45,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:45,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:45,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:45,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:45,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:45,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 135 transitions, 1509 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:45,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:45,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:45,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:46,159 INFO L124 PetriNetUnfolderBase]: 285/518 cut-off events. [2024-06-21 19:10:46,159 INFO L125 PetriNetUnfolderBase]: For 20901/20901 co-relation queries the response was YES. [2024-06-21 19:10:46,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3687 conditions, 518 events. 285/518 cut-off events. For 20901/20901 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2194 event pairs, 28 based on Foata normal form. 2/519 useless extension candidates. Maximal degree in co-relation 3612. Up to 444 conditions per place. [2024-06-21 19:10:46,163 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 120 selfloop transitions, 27 changer transitions 0/149 dead transitions. [2024-06-21 19:10:46,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 149 transitions, 1871 flow [2024-06-21 19:10:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 19:10:46,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 19:10:46,165 INFO L175 Difference]: Start difference. First operand has 161 places, 135 transitions, 1509 flow. Second operand 9 states and 96 transitions. [2024-06-21 19:10:46,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 149 transitions, 1871 flow [2024-06-21 19:10:46,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 149 transitions, 1785 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:46,207 INFO L231 Difference]: Finished difference. Result has 163 places, 136 transitions, 1518 flow [2024-06-21 19:10:46,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1518, PETRI_PLACES=163, PETRI_TRANSITIONS=136} [2024-06-21 19:10:46,208 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 135 predicate places. [2024-06-21 19:10:46,209 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 136 transitions, 1518 flow [2024-06-21 19:10:46,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:46,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:46,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:46,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:10:46,209 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:46,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2119174435, now seen corresponding path program 5 times [2024-06-21 19:10:46,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240007049] [2024-06-21 19:10:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:47,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:47,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240007049] [2024-06-21 19:10:47,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240007049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:47,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:47,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:47,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454147662] [2024-06-21 19:10:47,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:47,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:47,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:47,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:47,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:47,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:47,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 136 transitions, 1518 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:47,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:47,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:47,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:47,424 INFO L124 PetriNetUnfolderBase]: 289/526 cut-off events. [2024-06-21 19:10:47,424 INFO L125 PetriNetUnfolderBase]: For 22054/22054 co-relation queries the response was YES. [2024-06-21 19:10:47,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 526 events. 289/526 cut-off events. For 22054/22054 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2225 event pairs, 34 based on Foata normal form. 2/527 useless extension candidates. Maximal degree in co-relation 3658. Up to 436 conditions per place. [2024-06-21 19:10:47,427 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 111 selfloop transitions, 36 changer transitions 0/149 dead transitions. [2024-06-21 19:10:47,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 149 transitions, 1878 flow [2024-06-21 19:10:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 19:10:47,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 19:10:47,429 INFO L175 Difference]: Start difference. First operand has 163 places, 136 transitions, 1518 flow. Second operand 9 states and 96 transitions. [2024-06-21 19:10:47,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 149 transitions, 1878 flow [2024-06-21 19:10:47,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 149 transitions, 1795 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:47,473 INFO L231 Difference]: Finished difference. Result has 165 places, 137 transitions, 1549 flow [2024-06-21 19:10:47,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1549, PETRI_PLACES=165, PETRI_TRANSITIONS=137} [2024-06-21 19:10:47,474 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 137 predicate places. [2024-06-21 19:10:47,474 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 137 transitions, 1549 flow [2024-06-21 19:10:47,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:47,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:47,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:47,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:10:47,475 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:47,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:47,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2119358885, now seen corresponding path program 1 times [2024-06-21 19:10:47,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:47,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398957424] [2024-06-21 19:10:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:47,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:48,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:48,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398957424] [2024-06-21 19:10:48,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398957424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:48,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:48,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709907030] [2024-06-21 19:10:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:48,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:48,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:48,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:48,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 137 transitions, 1549 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:48,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:48,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:48,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:48,731 INFO L124 PetriNetUnfolderBase]: 295/536 cut-off events. [2024-06-21 19:10:48,731 INFO L125 PetriNetUnfolderBase]: For 22611/22611 co-relation queries the response was YES. [2024-06-21 19:10:48,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3784 conditions, 536 events. 295/536 cut-off events. For 22611/22611 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2276 event pairs, 33 based on Foata normal form. 2/537 useless extension candidates. Maximal degree in co-relation 3707. Up to 359 conditions per place. [2024-06-21 19:10:48,735 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 94 selfloop transitions, 56 changer transitions 0/152 dead transitions. [2024-06-21 19:10:48,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 152 transitions, 2013 flow [2024-06-21 19:10:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 19:10:48,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2024-06-21 19:10:48,736 INFO L175 Difference]: Start difference. First operand has 165 places, 137 transitions, 1549 flow. Second operand 8 states and 101 transitions. [2024-06-21 19:10:48,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 152 transitions, 2013 flow [2024-06-21 19:10:48,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 152 transitions, 1909 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:48,780 INFO L231 Difference]: Finished difference. Result has 166 places, 139 transitions, 1590 flow [2024-06-21 19:10:48,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1590, PETRI_PLACES=166, PETRI_TRANSITIONS=139} [2024-06-21 19:10:48,781 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 138 predicate places. [2024-06-21 19:10:48,781 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 139 transitions, 1590 flow [2024-06-21 19:10:48,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:48,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:48,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:48,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:10:48,782 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:48,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2119359133, now seen corresponding path program 1 times [2024-06-21 19:10:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:48,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917519694] [2024-06-21 19:10:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:48,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:49,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:49,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917519694] [2024-06-21 19:10:49,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917519694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:49,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:49,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:49,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380098353] [2024-06-21 19:10:49,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:49,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:49,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:49,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:49,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:10:49,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 139 transitions, 1590 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:49,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:49,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:10:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:49,783 INFO L124 PetriNetUnfolderBase]: 317/590 cut-off events. [2024-06-21 19:10:49,783 INFO L125 PetriNetUnfolderBase]: For 32677/32677 co-relation queries the response was YES. [2024-06-21 19:10:49,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 590 events. 317/590 cut-off events. For 32677/32677 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2602 event pairs, 45 based on Foata normal form. 12/601 useless extension candidates. Maximal degree in co-relation 3981. Up to 359 conditions per place. [2024-06-21 19:10:49,787 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 97 selfloop transitions, 49 changer transitions 8/157 dead transitions. [2024-06-21 19:10:49,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 157 transitions, 2092 flow [2024-06-21 19:10:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-21 19:10:49,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47844827586206895 [2024-06-21 19:10:49,788 INFO L175 Difference]: Start difference. First operand has 166 places, 139 transitions, 1590 flow. Second operand 8 states and 111 transitions. [2024-06-21 19:10:49,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 157 transitions, 2092 flow [2024-06-21 19:10:49,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 157 transitions, 1963 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:49,835 INFO L231 Difference]: Finished difference. Result has 168 places, 134 transitions, 1516 flow [2024-06-21 19:10:49,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1516, PETRI_PLACES=168, PETRI_TRANSITIONS=134} [2024-06-21 19:10:49,835 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 140 predicate places. [2024-06-21 19:10:49,835 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 134 transitions, 1516 flow [2024-06-21 19:10:49,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:49,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:49,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:49,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:10:49,836 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:49,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2119352189, now seen corresponding path program 2 times [2024-06-21 19:10:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873585668] [2024-06-21 19:10:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873585668] [2024-06-21 19:10:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873585668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637634169] [2024-06-21 19:10:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:50,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:50,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:50,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 134 transitions, 1516 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:50,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:50,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:50,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:51,006 INFO L124 PetriNetUnfolderBase]: 293/550 cut-off events. [2024-06-21 19:10:51,006 INFO L125 PetriNetUnfolderBase]: For 21316/21316 co-relation queries the response was YES. [2024-06-21 19:10:51,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3778 conditions, 550 events. 293/550 cut-off events. For 21316/21316 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2421 event pairs, 43 based on Foata normal form. 1/550 useless extension candidates. Maximal degree in co-relation 3700. Up to 402 conditions per place. [2024-06-21 19:10:51,010 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 93 selfloop transitions, 46 changer transitions 2/143 dead transitions. [2024-06-21 19:10:51,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 143 transitions, 1820 flow [2024-06-21 19:10:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 19:10:51,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2024-06-21 19:10:51,011 INFO L175 Difference]: Start difference. First operand has 168 places, 134 transitions, 1516 flow. Second operand 8 states and 95 transitions. [2024-06-21 19:10:51,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 143 transitions, 1820 flow [2024-06-21 19:10:51,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 143 transitions, 1690 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:51,063 INFO L231 Difference]: Finished difference. Result has 169 places, 132 transitions, 1466 flow [2024-06-21 19:10:51,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1466, PETRI_PLACES=169, PETRI_TRANSITIONS=132} [2024-06-21 19:10:51,064 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 141 predicate places. [2024-06-21 19:10:51,064 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 132 transitions, 1466 flow [2024-06-21 19:10:51,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:51,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:51,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:10:51,065 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:51,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash -410184659, now seen corresponding path program 6 times [2024-06-21 19:10:51,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:51,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42104004] [2024-06-21 19:10:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42104004] [2024-06-21 19:10:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42104004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:51,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53792308] [2024-06-21 19:10:51,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:51,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:52,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:52,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 132 transitions, 1466 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:52,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:52,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:52,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:52,298 INFO L124 PetriNetUnfolderBase]: 280/523 cut-off events. [2024-06-21 19:10:52,298 INFO L125 PetriNetUnfolderBase]: For 24139/24139 co-relation queries the response was YES. [2024-06-21 19:10:52,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3706 conditions, 523 events. 280/523 cut-off events. For 24139/24139 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2290 event pairs, 40 based on Foata normal form. 2/521 useless extension candidates. Maximal degree in co-relation 3627. Up to 448 conditions per place. [2024-06-21 19:10:52,302 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 120 selfloop transitions, 23 changer transitions 0/145 dead transitions. [2024-06-21 19:10:52,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 145 transitions, 1822 flow [2024-06-21 19:10:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-21 19:10:52,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 19:10:52,304 INFO L175 Difference]: Start difference. First operand has 169 places, 132 transitions, 1466 flow. Second operand 9 states and 93 transitions. [2024-06-21 19:10:52,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 145 transitions, 1822 flow [2024-06-21 19:10:52,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 145 transitions, 1692 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:10:52,355 INFO L231 Difference]: Finished difference. Result has 169 places, 133 transitions, 1426 flow [2024-06-21 19:10:52,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1336, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1426, PETRI_PLACES=169, PETRI_TRANSITIONS=133} [2024-06-21 19:10:52,355 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 141 predicate places. [2024-06-21 19:10:52,356 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 133 transitions, 1426 flow [2024-06-21 19:10:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:52,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:52,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:52,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:10:52,356 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:52,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:52,357 INFO L85 PathProgramCache]: Analyzing trace with hash -410124209, now seen corresponding path program 7 times [2024-06-21 19:10:52,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:52,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477245966] [2024-06-21 19:10:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:52,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:53,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:53,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477245966] [2024-06-21 19:10:53,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477245966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:53,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:53,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:53,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616754406] [2024-06-21 19:10:53,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:53,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:53,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:53,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:53,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 133 transitions, 1426 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:53,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:53,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:53,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:53,719 INFO L124 PetriNetUnfolderBase]: 284/531 cut-off events. [2024-06-21 19:10:53,719 INFO L125 PetriNetUnfolderBase]: For 24860/24860 co-relation queries the response was YES. [2024-06-21 19:10:53,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 531 events. 284/531 cut-off events. For 24860/24860 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2342 event pairs, 42 based on Foata normal form. 2/529 useless extension candidates. Maximal degree in co-relation 3636. Up to 457 conditions per place. [2024-06-21 19:10:53,723 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 115 selfloop transitions, 27 changer transitions 0/144 dead transitions. [2024-06-21 19:10:53,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 144 transitions, 1776 flow [2024-06-21 19:10:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-21 19:10:53,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 19:10:53,725 INFO L175 Difference]: Start difference. First operand has 169 places, 133 transitions, 1426 flow. Second operand 9 states and 93 transitions. [2024-06-21 19:10:53,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 144 transitions, 1776 flow [2024-06-21 19:10:53,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 144 transitions, 1694 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:53,783 INFO L231 Difference]: Finished difference. Result has 171 places, 134 transitions, 1445 flow [2024-06-21 19:10:53,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1445, PETRI_PLACES=171, PETRI_TRANSITIONS=134} [2024-06-21 19:10:53,784 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 143 predicate places. [2024-06-21 19:10:53,784 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 134 transitions, 1445 flow [2024-06-21 19:10:53,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:53,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:53,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:53,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:10:53,784 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:53,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1063984529, now seen corresponding path program 8 times [2024-06-21 19:10:53,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:53,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767408458] [2024-06-21 19:10:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:54,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:54,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767408458] [2024-06-21 19:10:54,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767408458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:54,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:54,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:54,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261329260] [2024-06-21 19:10:54,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:54,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:54,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:54,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:54,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 134 transitions, 1445 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:54,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:54,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:54,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:55,106 INFO L124 PetriNetUnfolderBase]: 288/539 cut-off events. [2024-06-21 19:10:55,107 INFO L125 PetriNetUnfolderBase]: For 26108/26108 co-relation queries the response was YES. [2024-06-21 19:10:55,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3773 conditions, 539 events. 288/539 cut-off events. For 26108/26108 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2390 event pairs, 42 based on Foata normal form. 2/537 useless extension candidates. Maximal degree in co-relation 3694. Up to 458 conditions per place. [2024-06-21 19:10:55,110 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 111 selfloop transitions, 31 changer transitions 0/144 dead transitions. [2024-06-21 19:10:55,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 144 transitions, 1793 flow [2024-06-21 19:10:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 19:10:55,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-21 19:10:55,111 INFO L175 Difference]: Start difference. First operand has 171 places, 134 transitions, 1445 flow. Second operand 9 states and 95 transitions. [2024-06-21 19:10:55,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 144 transitions, 1793 flow [2024-06-21 19:10:55,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 144 transitions, 1704 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:55,164 INFO L231 Difference]: Finished difference. Result has 173 places, 135 transitions, 1466 flow [2024-06-21 19:10:55,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1466, PETRI_PLACES=173, PETRI_TRANSITIONS=135} [2024-06-21 19:10:55,165 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 145 predicate places. [2024-06-21 19:10:55,165 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 135 transitions, 1466 flow [2024-06-21 19:10:55,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:55,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:55,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:55,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:10:55,165 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:55,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1867337649, now seen corresponding path program 9 times [2024-06-21 19:10:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:55,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334245467] [2024-06-21 19:10:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:55,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:56,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:56,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334245467] [2024-06-21 19:10:56,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334245467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:56,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:56,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:56,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217210557] [2024-06-21 19:10:56,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:56,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:56,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:56,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:56,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 135 transitions, 1466 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:56,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:56,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:56,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:56,314 INFO L124 PetriNetUnfolderBase]: 285/534 cut-off events. [2024-06-21 19:10:56,314 INFO L125 PetriNetUnfolderBase]: For 24191/24191 co-relation queries the response was YES. [2024-06-21 19:10:56,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3590 conditions, 534 events. 285/534 cut-off events. For 24191/24191 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2363 event pairs, 47 based on Foata normal form. 2/532 useless extension candidates. Maximal degree in co-relation 3510. Up to 414 conditions per place. [2024-06-21 19:10:56,318 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 91 selfloop transitions, 50 changer transitions 0/143 dead transitions. [2024-06-21 19:10:56,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 143 transitions, 1766 flow [2024-06-21 19:10:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-21 19:10:56,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 19:10:56,319 INFO L175 Difference]: Start difference. First operand has 173 places, 135 transitions, 1466 flow. Second operand 9 states and 93 transitions. [2024-06-21 19:10:56,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 143 transitions, 1766 flow [2024-06-21 19:10:56,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 143 transitions, 1666 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:56,368 INFO L231 Difference]: Finished difference. Result has 175 places, 135 transitions, 1470 flow [2024-06-21 19:10:56,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1470, PETRI_PLACES=175, PETRI_TRANSITIONS=135} [2024-06-21 19:10:56,368 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 147 predicate places. [2024-06-21 19:10:56,368 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 135 transitions, 1470 flow [2024-06-21 19:10:56,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:56,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:56,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:56,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:10:56,369 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:56,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash -126212945, now seen corresponding path program 2 times [2024-06-21 19:10:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:56,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862133471] [2024-06-21 19:10:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:56,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:57,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:57,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862133471] [2024-06-21 19:10:57,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862133471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:57,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:57,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:57,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27494461] [2024-06-21 19:10:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:57,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:57,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:57,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 135 transitions, 1470 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:57,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:57,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:57,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:57,402 INFO L124 PetriNetUnfolderBase]: 293/547 cut-off events. [2024-06-21 19:10:57,402 INFO L125 PetriNetUnfolderBase]: For 24248/24248 co-relation queries the response was YES. [2024-06-21 19:10:57,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3706 conditions, 547 events. 293/547 cut-off events. For 24248/24248 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2434 event pairs, 47 based on Foata normal form. 1/544 useless extension candidates. Maximal degree in co-relation 3625. Up to 388 conditions per place. [2024-06-21 19:10:57,406 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 99 selfloop transitions, 48 changer transitions 0/149 dead transitions. [2024-06-21 19:10:57,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 149 transitions, 1952 flow [2024-06-21 19:10:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 19:10:57,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2024-06-21 19:10:57,408 INFO L175 Difference]: Start difference. First operand has 175 places, 135 transitions, 1470 flow. Second operand 8 states and 101 transitions. [2024-06-21 19:10:57,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 149 transitions, 1952 flow [2024-06-21 19:10:57,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 149 transitions, 1752 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 19:10:57,462 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1442 flow [2024-06-21 19:10:57,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1442, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-06-21 19:10:57,462 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 146 predicate places. [2024-06-21 19:10:57,462 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1442 flow [2024-06-21 19:10:57,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:57,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:57,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:57,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:10:57,463 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:57,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1867152951, now seen corresponding path program 2 times [2024-06-21 19:10:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:57,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765210957] [2024-06-21 19:10:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765210957] [2024-06-21 19:10:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765210957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:58,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:58,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:10:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94774242] [2024-06-21 19:10:58,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:58,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:10:58,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:10:58,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:10:58,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:10:58,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1442 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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) [2024-06-21 19:10:58,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:58,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:10:58,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:58,713 INFO L124 PetriNetUnfolderBase]: 313/591 cut-off events. [2024-06-21 19:10:58,714 INFO L125 PetriNetUnfolderBase]: For 38281/38281 co-relation queries the response was YES. [2024-06-21 19:10:58,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3855 conditions, 591 events. 313/591 cut-off events. For 38281/38281 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2686 event pairs, 52 based on Foata normal form. 12/599 useless extension candidates. Maximal degree in co-relation 3775. Up to 391 conditions per place. [2024-06-21 19:10:58,718 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 101 selfloop transitions, 43 changer transitions 8/154 dead transitions. [2024-06-21 19:10:58,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 154 transitions, 1854 flow [2024-06-21 19:10:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 19:10:58,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421455938697318 [2024-06-21 19:10:58,719 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1442 flow. Second operand 9 states and 110 transitions. [2024-06-21 19:10:58,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 154 transitions, 1854 flow [2024-06-21 19:10:58,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 154 transitions, 1770 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:58,774 INFO L231 Difference]: Finished difference. Result has 179 places, 137 transitions, 1443 flow [2024-06-21 19:10:58,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1443, PETRI_PLACES=179, PETRI_TRANSITIONS=137} [2024-06-21 19:10:58,775 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 151 predicate places. [2024-06-21 19:10:58,775 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 137 transitions, 1443 flow [2024-06-21 19:10:58,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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) [2024-06-21 19:10:58,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:58,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:58,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:10:58,776 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:10:58,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash -119956835, now seen corresponding path program 3 times [2024-06-21 19:10:58,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:58,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102600303] [2024-06-21 19:10:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:58,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:59,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:59,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102600303] [2024-06-21 19:10:59,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102600303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:59,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:59,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:59,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823452071] [2024-06-21 19:10:59,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:59,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:59,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:59,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:10:59,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 137 transitions, 1443 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:59,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:59,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:10:59,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:59,987 INFO L124 PetriNetUnfolderBase]: 295/556 cut-off events. [2024-06-21 19:10:59,988 INFO L125 PetriNetUnfolderBase]: For 25980/25980 co-relation queries the response was YES. [2024-06-21 19:10:59,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 556 events. 295/556 cut-off events. For 25980/25980 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2527 event pairs, 89 based on Foata normal form. 1/556 useless extension candidates. Maximal degree in co-relation 3728. Up to 509 conditions per place. [2024-06-21 19:10:59,991 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 125 selfloop transitions, 23 changer transitions 0/150 dead transitions. [2024-06-21 19:10:59,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 150 transitions, 1937 flow [2024-06-21 19:10:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-21 19:10:59,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-06-21 19:10:59,993 INFO L175 Difference]: Start difference. First operand has 179 places, 137 transitions, 1443 flow. Second operand 8 states and 84 transitions. [2024-06-21 19:10:59,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 150 transitions, 1937 flow [2024-06-21 19:11:00,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 150 transitions, 1833 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:00,046 INFO L231 Difference]: Finished difference. Result has 181 places, 141 transitions, 1469 flow [2024-06-21 19:11:00,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1469, PETRI_PLACES=181, PETRI_TRANSITIONS=141} [2024-06-21 19:11:00,047 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 153 predicate places. [2024-06-21 19:11:00,047 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 141 transitions, 1469 flow [2024-06-21 19:11:00,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:00,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:00,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:11:00,047 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1630977591, now seen corresponding path program 3 times [2024-06-21 19:11:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702002705] [2024-06-21 19:11:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:01,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:01,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702002705] [2024-06-21 19:11:01,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702002705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:01,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:01,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:01,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92765247] [2024-06-21 19:11:01,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:01,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:01,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:01,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:01,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:01,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 141 transitions, 1469 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:01,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:01,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:01,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:01,406 INFO L124 PetriNetUnfolderBase]: 299/564 cut-off events. [2024-06-21 19:11:01,407 INFO L125 PetriNetUnfolderBase]: For 28291/28291 co-relation queries the response was YES. [2024-06-21 19:11:01,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3867 conditions, 564 events. 299/564 cut-off events. For 28291/28291 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2573 event pairs, 91 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 3782. Up to 512 conditions per place. [2024-06-21 19:11:01,411 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 126 selfloop transitions, 24 changer transitions 0/152 dead transitions. [2024-06-21 19:11:01,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 152 transitions, 1831 flow [2024-06-21 19:11:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-06-21 19:11:01,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33448275862068966 [2024-06-21 19:11:01,412 INFO L175 Difference]: Start difference. First operand has 181 places, 141 transitions, 1469 flow. Second operand 10 states and 97 transitions. [2024-06-21 19:11:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 152 transitions, 1831 flow [2024-06-21 19:11:01,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 152 transitions, 1777 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 19:11:01,476 INFO L231 Difference]: Finished difference. Result has 187 places, 142 transitions, 1493 flow [2024-06-21 19:11:01,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1493, PETRI_PLACES=187, PETRI_TRANSITIONS=142} [2024-06-21 19:11:01,477 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 159 predicate places. [2024-06-21 19:11:01,477 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 142 transitions, 1493 flow [2024-06-21 19:11:01,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:01,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:01,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:01,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:11:01,478 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:01,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1630977839, now seen corresponding path program 4 times [2024-06-21 19:11:01,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:01,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124984138] [2024-06-21 19:11:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124984138] [2024-06-21 19:11:02,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124984138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:02,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172582415] [2024-06-21 19:11:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:02,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:02,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:02,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:02,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 142 transitions, 1493 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:02,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:02,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:02,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:02,797 INFO L124 PetriNetUnfolderBase]: 302/569 cut-off events. [2024-06-21 19:11:02,798 INFO L125 PetriNetUnfolderBase]: For 28238/28238 co-relation queries the response was YES. [2024-06-21 19:11:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 569 events. 302/569 cut-off events. For 28238/28238 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2613 event pairs, 91 based on Foata normal form. 1/569 useless extension candidates. Maximal degree in co-relation 3857. Up to 509 conditions per place. [2024-06-21 19:11:02,802 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 126 selfloop transitions, 29 changer transitions 0/157 dead transitions. [2024-06-21 19:11:02,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 157 transitions, 2123 flow [2024-06-21 19:11:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 19:11:02,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-21 19:11:02,803 INFO L175 Difference]: Start difference. First operand has 187 places, 142 transitions, 1493 flow. Second operand 9 states and 95 transitions. [2024-06-21 19:11:02,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 157 transitions, 2123 flow [2024-06-21 19:11:02,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 157 transitions, 2055 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:02,866 INFO L231 Difference]: Finished difference. Result has 189 places, 146 transitions, 1572 flow [2024-06-21 19:11:02,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1572, PETRI_PLACES=189, PETRI_TRANSITIONS=146} [2024-06-21 19:11:02,867 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 161 predicate places. [2024-06-21 19:11:02,868 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 146 transitions, 1572 flow [2024-06-21 19:11:02,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:02,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:02,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:02,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:11:02,868 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:02,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:02,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1630680921, now seen corresponding path program 4 times [2024-06-21 19:11:02,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:02,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632883841] [2024-06-21 19:11:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:02,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:03,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:03,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632883841] [2024-06-21 19:11:03,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632883841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:03,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:03,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:03,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821819571] [2024-06-21 19:11:03,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:03,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:03,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:03,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:03,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:04,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:04,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 146 transitions, 1572 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:04,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:04,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:04,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:04,303 INFO L124 PetriNetUnfolderBase]: 335/636 cut-off events. [2024-06-21 19:11:04,304 INFO L125 PetriNetUnfolderBase]: For 44660/44660 co-relation queries the response was YES. [2024-06-21 19:11:04,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 636 events. 335/636 cut-off events. For 44660/44660 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2943 event pairs, 102 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 4762. Up to 496 conditions per place. [2024-06-21 19:11:04,309 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 135 selfloop transitions, 26 changer transitions 0/163 dead transitions. [2024-06-21 19:11:04,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 163 transitions, 2132 flow [2024-06-21 19:11:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 102 transitions. [2024-06-21 19:11:04,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35172413793103446 [2024-06-21 19:11:04,310 INFO L175 Difference]: Start difference. First operand has 189 places, 146 transitions, 1572 flow. Second operand 10 states and 102 transitions. [2024-06-21 19:11:04,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 163 transitions, 2132 flow [2024-06-21 19:11:04,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 163 transitions, 2041 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:04,379 INFO L231 Difference]: Finished difference. Result has 193 places, 147 transitions, 1565 flow [2024-06-21 19:11:04,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1565, PETRI_PLACES=193, PETRI_TRANSITIONS=147} [2024-06-21 19:11:04,380 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 165 predicate places. [2024-06-21 19:11:04,380 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 147 transitions, 1565 flow [2024-06-21 19:11:04,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:04,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:04,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:04,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:11:04,381 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:04,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1860896841, now seen corresponding path program 5 times [2024-06-21 19:11:04,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:04,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882001894] [2024-06-21 19:11:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:04,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:05,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:05,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882001894] [2024-06-21 19:11:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882001894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:05,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:05,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:05,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917685454] [2024-06-21 19:11:05,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:05,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:05,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:05,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:05,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:05,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 147 transitions, 1565 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:05,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:05,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:05,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:05,701 INFO L124 PetriNetUnfolderBase]: 329/626 cut-off events. [2024-06-21 19:11:05,701 INFO L125 PetriNetUnfolderBase]: For 42750/42750 co-relation queries the response was YES. [2024-06-21 19:11:05,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 626 events. 329/626 cut-off events. For 42750/42750 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2917 event pairs, 102 based on Foata normal form. 4/629 useless extension candidates. Maximal degree in co-relation 4469. Up to 577 conditions per place. [2024-06-21 19:11:05,709 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 135 selfloop transitions, 21 changer transitions 0/158 dead transitions. [2024-06-21 19:11:05,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 158 transitions, 1946 flow [2024-06-21 19:11:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-21 19:11:05,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577586206896552 [2024-06-21 19:11:05,711 INFO L175 Difference]: Start difference. First operand has 193 places, 147 transitions, 1565 flow. Second operand 8 states and 83 transitions. [2024-06-21 19:11:05,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 158 transitions, 1946 flow [2024-06-21 19:11:05,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 158 transitions, 1877 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:05,804 INFO L231 Difference]: Finished difference. Result has 195 places, 150 transitions, 1605 flow [2024-06-21 19:11:05,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1605, PETRI_PLACES=195, PETRI_TRANSITIONS=150} [2024-06-21 19:11:05,805 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 167 predicate places. [2024-06-21 19:11:05,805 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 150 transitions, 1605 flow [2024-06-21 19:11:05,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:05,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:05,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:05,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:11:05,805 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:05,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1860903785, now seen corresponding path program 3 times [2024-06-21 19:11:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:05,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484687781] [2024-06-21 19:11:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:05,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:07,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:07,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484687781] [2024-06-21 19:11:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484687781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:07,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853568852] [2024-06-21 19:11:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:07,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:07,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 150 transitions, 1605 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:07,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:07,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:07,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:07,329 INFO L124 PetriNetUnfolderBase]: 335/636 cut-off events. [2024-06-21 19:11:07,330 INFO L125 PetriNetUnfolderBase]: For 41267/41267 co-relation queries the response was YES. [2024-06-21 19:11:07,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 636 events. 335/636 cut-off events. For 41267/41267 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2968 event pairs, 104 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 4542. Up to 587 conditions per place. [2024-06-21 19:11:07,335 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 133 selfloop transitions, 26 changer transitions 0/161 dead transitions. [2024-06-21 19:11:07,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 161 transitions, 2001 flow [2024-06-21 19:11:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 19:11:07,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 19:11:07,349 INFO L175 Difference]: Start difference. First operand has 195 places, 150 transitions, 1605 flow. Second operand 8 states and 85 transitions. [2024-06-21 19:11:07,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 161 transitions, 2001 flow [2024-06-21 19:11:07,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 161 transitions, 1898 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:07,435 INFO L231 Difference]: Finished difference. Result has 198 places, 154 transitions, 1646 flow [2024-06-21 19:11:07,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1646, PETRI_PLACES=198, PETRI_TRANSITIONS=154} [2024-06-21 19:11:07,436 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 170 predicate places. [2024-06-21 19:11:07,436 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 154 transitions, 1646 flow [2024-06-21 19:11:07,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:07,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:07,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:07,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:11:07,437 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:07,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1867159895, now seen corresponding path program 4 times [2024-06-21 19:11:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806351158] [2024-06-21 19:11:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:08,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:08,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806351158] [2024-06-21 19:11:08,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806351158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:08,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:08,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:08,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189422029] [2024-06-21 19:11:08,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:08,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:08,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:08,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 154 transitions, 1646 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:08,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:08,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:08,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:08,513 INFO L124 PetriNetUnfolderBase]: 311/586 cut-off events. [2024-06-21 19:11:08,513 INFO L125 PetriNetUnfolderBase]: For 28824/28824 co-relation queries the response was YES. [2024-06-21 19:11:08,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 586 events. 311/586 cut-off events. For 28824/28824 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2693 event pairs, 48 based on Foata normal form. 1/582 useless extension candidates. Maximal degree in co-relation 3813. Up to 396 conditions per place. [2024-06-21 19:11:08,518 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 114 selfloop transitions, 45 changer transitions 0/161 dead transitions. [2024-06-21 19:11:08,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 161 transitions, 1980 flow [2024-06-21 19:11:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 19:11:08,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2024-06-21 19:11:08,519 INFO L175 Difference]: Start difference. First operand has 198 places, 154 transitions, 1646 flow. Second operand 8 states and 98 transitions. [2024-06-21 19:11:08,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 161 transitions, 1980 flow [2024-06-21 19:11:08,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 161 transitions, 1880 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:08,581 INFO L231 Difference]: Finished difference. Result has 200 places, 154 transitions, 1641 flow [2024-06-21 19:11:08,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1641, PETRI_PLACES=200, PETRI_TRANSITIONS=154} [2024-06-21 19:11:08,582 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 172 predicate places. [2024-06-21 19:11:08,582 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 154 transitions, 1641 flow [2024-06-21 19:11:08,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:08,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:08,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:11:08,582 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:08,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash 354280207, now seen corresponding path program 1 times [2024-06-21 19:11:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:08,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940660651] [2024-06-21 19:11:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:08,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:09,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:09,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940660651] [2024-06-21 19:11:09,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940660651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:09,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:09,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861023820] [2024-06-21 19:11:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:09,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:09,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:09,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:09,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:09,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 154 transitions, 1641 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:09,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:09,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:09,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:09,696 INFO L124 PetriNetUnfolderBase]: 319/603 cut-off events. [2024-06-21 19:11:09,696 INFO L125 PetriNetUnfolderBase]: For 28612/28612 co-relation queries the response was YES. [2024-06-21 19:11:09,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3930 conditions, 603 events. 319/603 cut-off events. For 28612/28612 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2815 event pairs, 32 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 3836. Up to 466 conditions per place. [2024-06-21 19:11:09,701 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 143 selfloop transitions, 26 changer transitions 0/171 dead transitions. [2024-06-21 19:11:09,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 171 transitions, 2036 flow [2024-06-21 19:11:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 19:11:09,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-06-21 19:11:09,702 INFO L175 Difference]: Start difference. First operand has 200 places, 154 transitions, 1641 flow. Second operand 8 states and 86 transitions. [2024-06-21 19:11:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 171 transitions, 2036 flow [2024-06-21 19:11:09,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 171 transitions, 1930 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:09,759 INFO L231 Difference]: Finished difference. Result has 201 places, 156 transitions, 1624 flow [2024-06-21 19:11:09,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1624, PETRI_PLACES=201, PETRI_TRANSITIONS=156} [2024-06-21 19:11:09,760 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 173 predicate places. [2024-06-21 19:11:09,760 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 156 transitions, 1624 flow [2024-06-21 19:11:09,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:09,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:09,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:11:09,760 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:09,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1731028985, now seen corresponding path program 2 times [2024-06-21 19:11:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:09,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632872271] [2024-06-21 19:11:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:09,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:10,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632872271] [2024-06-21 19:11:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632872271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:10,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674839667] [2024-06-21 19:11:10,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:10,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:10,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:10,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 156 transitions, 1624 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:10,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:10,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:10,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:10,936 INFO L124 PetriNetUnfolderBase]: 323/611 cut-off events. [2024-06-21 19:11:10,936 INFO L125 PetriNetUnfolderBase]: For 28385/28385 co-relation queries the response was YES. [2024-06-21 19:11:10,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3967 conditions, 611 events. 323/611 cut-off events. For 28385/28385 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2872 event pairs, 52 based on Foata normal form. 2/612 useless extension candidates. Maximal degree in co-relation 3873. Up to 514 conditions per place. [2024-06-21 19:11:10,943 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 134 selfloop transitions, 34 changer transitions 0/170 dead transitions. [2024-06-21 19:11:10,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 170 transitions, 2006 flow [2024-06-21 19:11:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 19:11:10,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 19:11:10,944 INFO L175 Difference]: Start difference. First operand has 201 places, 156 transitions, 1624 flow. Second operand 8 states and 88 transitions. [2024-06-21 19:11:10,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 170 transitions, 2006 flow [2024-06-21 19:11:11,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 170 transitions, 1948 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:11:11,018 INFO L231 Difference]: Finished difference. Result has 204 places, 157 transitions, 1654 flow [2024-06-21 19:11:11,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1654, PETRI_PLACES=204, PETRI_TRANSITIONS=157} [2024-06-21 19:11:11,019 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 176 predicate places. [2024-06-21 19:11:11,019 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 157 transitions, 1654 flow [2024-06-21 19:11:11,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:11,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:11,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:11,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:11:11,019 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:11,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1731486545, now seen corresponding path program 3 times [2024-06-21 19:11:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:11,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425893552] [2024-06-21 19:11:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:11,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425893552] [2024-06-21 19:11:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425893552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:11,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:11,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:11,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465438041] [2024-06-21 19:11:11,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:11,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:11,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:11,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 157 transitions, 1654 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:11,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:11,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:11,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:12,160 INFO L124 PetriNetUnfolderBase]: 335/635 cut-off events. [2024-06-21 19:11:12,160 INFO L125 PetriNetUnfolderBase]: For 29690/29690 co-relation queries the response was YES. [2024-06-21 19:11:12,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 635 events. 335/635 cut-off events. For 29690/29690 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3042 event pairs, 49 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 3979. Up to 504 conditions per place. [2024-06-21 19:11:12,165 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 140 selfloop transitions, 32 changer transitions 0/174 dead transitions. [2024-06-21 19:11:12,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 174 transitions, 2054 flow [2024-06-21 19:11:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 19:11:12,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362068965517243 [2024-06-21 19:11:12,166 INFO L175 Difference]: Start difference. First operand has 204 places, 157 transitions, 1654 flow. Second operand 8 states and 89 transitions. [2024-06-21 19:11:12,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 174 transitions, 2054 flow [2024-06-21 19:11:12,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 174 transitions, 1976 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:12,223 INFO L231 Difference]: Finished difference. Result has 207 places, 160 transitions, 1682 flow [2024-06-21 19:11:12,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1682, PETRI_PLACES=207, PETRI_TRANSITIONS=160} [2024-06-21 19:11:12,224 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 179 predicate places. [2024-06-21 19:11:12,224 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 160 transitions, 1682 flow [2024-06-21 19:11:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:12,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:12,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:11:12,224 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:12,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2090710767, now seen corresponding path program 4 times [2024-06-21 19:11:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078602691] [2024-06-21 19:11:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078602691] [2024-06-21 19:11:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078602691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:13,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:13,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186140572] [2024-06-21 19:11:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 160 transitions, 1682 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:13,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:13,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:13,377 INFO L124 PetriNetUnfolderBase]: 339/642 cut-off events. [2024-06-21 19:11:13,377 INFO L125 PetriNetUnfolderBase]: For 30976/30976 co-relation queries the response was YES. [2024-06-21 19:11:13,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4155 conditions, 642 events. 339/642 cut-off events. For 30976/30976 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3064 event pairs, 42 based on Foata normal form. 2/643 useless extension candidates. Maximal degree in co-relation 4058. Up to 544 conditions per place. [2024-06-21 19:11:13,382 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 137 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-21 19:11:13,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 174 transitions, 2076 flow [2024-06-21 19:11:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 19:11:13,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-06-21 19:11:13,384 INFO L175 Difference]: Start difference. First operand has 207 places, 160 transitions, 1682 flow. Second operand 9 states and 102 transitions. [2024-06-21 19:11:13,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 174 transitions, 2076 flow [2024-06-21 19:11:13,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 174 transitions, 1984 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:13,455 INFO L231 Difference]: Finished difference. Result has 209 places, 161 transitions, 1684 flow [2024-06-21 19:11:13,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1684, PETRI_PLACES=209, PETRI_TRANSITIONS=161} [2024-06-21 19:11:13,455 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 181 predicate places. [2024-06-21 19:11:13,455 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 161 transitions, 1684 flow [2024-06-21 19:11:13,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:13,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:13,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:11:13,456 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:13,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1917403185, now seen corresponding path program 5 times [2024-06-21 19:11:13,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:13,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212367091] [2024-06-21 19:11:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:14,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:14,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212367091] [2024-06-21 19:11:14,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212367091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:14,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:14,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:14,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509239715] [2024-06-21 19:11:14,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:14,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:14,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:14,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:14,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 161 transitions, 1684 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:14,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:14,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:14,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:14,747 INFO L124 PetriNetUnfolderBase]: 343/650 cut-off events. [2024-06-21 19:11:14,747 INFO L125 PetriNetUnfolderBase]: For 31909/31909 co-relation queries the response was YES. [2024-06-21 19:11:14,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 650 events. 343/650 cut-off events. For 31909/31909 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3110 event pairs, 39 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 4081. Up to 518 conditions per place. [2024-06-21 19:11:14,753 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 141 selfloop transitions, 33 changer transitions 0/176 dead transitions. [2024-06-21 19:11:14,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 176 transitions, 2086 flow [2024-06-21 19:11:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 19:11:14,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 19:11:14,754 INFO L175 Difference]: Start difference. First operand has 209 places, 161 transitions, 1684 flow. Second operand 9 states and 103 transitions. [2024-06-21 19:11:14,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 176 transitions, 2086 flow [2024-06-21 19:11:14,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 176 transitions, 2002 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:14,826 INFO L231 Difference]: Finished difference. Result has 211 places, 162 transitions, 1694 flow [2024-06-21 19:11:14,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1694, PETRI_PLACES=211, PETRI_TRANSITIONS=162} [2024-06-21 19:11:14,827 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 183 predicate places. [2024-06-21 19:11:14,827 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 162 transitions, 1694 flow [2024-06-21 19:11:14,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:14,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:14,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:14,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:11:14,827 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:14,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1269898935, now seen corresponding path program 6 times [2024-06-21 19:11:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797593010] [2024-06-21 19:11:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:15,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797593010] [2024-06-21 19:11:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797593010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:15,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:15,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:15,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69344632] [2024-06-21 19:11:15,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:15,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:15,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:15,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:15,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 162 transitions, 1694 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:15,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:15,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:15,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:16,167 INFO L124 PetriNetUnfolderBase]: 354/671 cut-off events. [2024-06-21 19:11:16,167 INFO L125 PetriNetUnfolderBase]: For 36878/36878 co-relation queries the response was YES. [2024-06-21 19:11:16,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4439 conditions, 671 events. 354/671 cut-off events. For 36878/36878 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3257 event pairs, 42 based on Foata normal form. 2/672 useless extension candidates. Maximal degree in co-relation 4341. Up to 487 conditions per place. [2024-06-21 19:11:16,173 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 138 selfloop transitions, 37 changer transitions 0/177 dead transitions. [2024-06-21 19:11:16,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 177 transitions, 2236 flow [2024-06-21 19:11:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 19:11:16,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40229885057471265 [2024-06-21 19:11:16,174 INFO L175 Difference]: Start difference. First operand has 211 places, 162 transitions, 1694 flow. Second operand 9 states and 105 transitions. [2024-06-21 19:11:16,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 177 transitions, 2236 flow [2024-06-21 19:11:16,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 177 transitions, 2152 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:16,254 INFO L231 Difference]: Finished difference. Result has 213 places, 164 transitions, 1735 flow [2024-06-21 19:11:16,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1735, PETRI_PLACES=213, PETRI_TRANSITIONS=164} [2024-06-21 19:11:16,255 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 185 predicate places. [2024-06-21 19:11:16,255 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 164 transitions, 1735 flow [2024-06-21 19:11:16,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:16,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:16,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:16,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:11:16,255 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:16,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1269902655, now seen corresponding path program 7 times [2024-06-21 19:11:16,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:16,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090518841] [2024-06-21 19:11:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:17,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:17,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090518841] [2024-06-21 19:11:17,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090518841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:17,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:17,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:17,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693788282] [2024-06-21 19:11:17,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:17,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:17,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:17,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:17,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:17,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 164 transitions, 1735 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:17,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:17,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:17,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:17,701 INFO L124 PetriNetUnfolderBase]: 358/678 cut-off events. [2024-06-21 19:11:17,702 INFO L125 PetriNetUnfolderBase]: For 38225/38225 co-relation queries the response was YES. [2024-06-21 19:11:17,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 678 events. 358/678 cut-off events. For 38225/38225 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3300 event pairs, 44 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 4391. Up to 524 conditions per place. [2024-06-21 19:11:17,708 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 136 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-21 19:11:17,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 176 transitions, 2133 flow [2024-06-21 19:11:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 19:11:17,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 19:11:17,711 INFO L175 Difference]: Start difference. First operand has 213 places, 164 transitions, 1735 flow. Second operand 9 states and 103 transitions. [2024-06-21 19:11:17,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 176 transitions, 2133 flow [2024-06-21 19:11:17,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 176 transitions, 2058 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:11:17,779 INFO L231 Difference]: Finished difference. Result has 217 places, 165 transitions, 1766 flow [2024-06-21 19:11:17,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1766, PETRI_PLACES=217, PETRI_TRANSITIONS=165} [2024-06-21 19:11:17,779 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 189 predicate places. [2024-06-21 19:11:17,779 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 165 transitions, 1766 flow [2024-06-21 19:11:17,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:17,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:17,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:17,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:11:17,780 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:17,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1275409185, now seen corresponding path program 8 times [2024-06-21 19:11:17,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:17,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916721293] [2024-06-21 19:11:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:17,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916721293] [2024-06-21 19:11:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916721293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:18,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:18,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:18,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41294806] [2024-06-21 19:11:18,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:18,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:18,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:18,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:18,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 165 transitions, 1766 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:18,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:18,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:18,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:19,022 INFO L124 PetriNetUnfolderBase]: 355/673 cut-off events. [2024-06-21 19:11:19,022 INFO L125 PetriNetUnfolderBase]: For 35455/35455 co-relation queries the response was YES. [2024-06-21 19:11:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4358 conditions, 673 events. 355/673 cut-off events. For 35455/35455 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3276 event pairs, 43 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 4258. Up to 519 conditions per place. [2024-06-21 19:11:19,029 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 128 selfloop transitions, 46 changer transitions 0/176 dead transitions. [2024-06-21 19:11:19,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 176 transitions, 2140 flow [2024-06-21 19:11:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 19:11:19,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-21 19:11:19,030 INFO L175 Difference]: Start difference. First operand has 217 places, 165 transitions, 1766 flow. Second operand 8 states and 97 transitions. [2024-06-21 19:11:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 176 transitions, 2140 flow [2024-06-21 19:11:19,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 176 transitions, 2034 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:19,108 INFO L231 Difference]: Finished difference. Result has 218 places, 165 transitions, 1756 flow [2024-06-21 19:11:19,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1756, PETRI_PLACES=218, PETRI_TRANSITIONS=165} [2024-06-21 19:11:19,109 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 190 predicate places. [2024-06-21 19:11:19,109 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 165 transitions, 1756 flow [2024-06-21 19:11:19,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:19,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:19,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:11:19,110 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:19,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1275616947, now seen corresponding path program 1 times [2024-06-21 19:11:19,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:19,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340146270] [2024-06-21 19:11:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:19,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:19,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:19,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340146270] [2024-06-21 19:11:19,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340146270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:19,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:19,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:19,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560489355] [2024-06-21 19:11:19,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:19,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:19,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:19,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 19:11:19,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 165 transitions, 1756 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:19,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:19,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 19:11:19,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:20,194 INFO L124 PetriNetUnfolderBase]: 371/709 cut-off events. [2024-06-21 19:11:20,195 INFO L125 PetriNetUnfolderBase]: For 50535/50535 co-relation queries the response was YES. [2024-06-21 19:11:20,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 709 events. 371/709 cut-off events. For 50535/50535 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3500 event pairs, 47 based on Foata normal form. 10/718 useless extension candidates. Maximal degree in co-relation 4418. Up to 510 conditions per place. [2024-06-21 19:11:20,200 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 123 selfloop transitions, 45 changer transitions 11/182 dead transitions. [2024-06-21 19:11:20,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 182 transitions, 2228 flow [2024-06-21 19:11:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:11:20,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521072796934866 [2024-06-21 19:11:20,202 INFO L175 Difference]: Start difference. First operand has 218 places, 165 transitions, 1756 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:11:20,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 182 transitions, 2228 flow [2024-06-21 19:11:20,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 182 transitions, 2128 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:20,285 INFO L231 Difference]: Finished difference. Result has 220 places, 162 transitions, 1734 flow [2024-06-21 19:11:20,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1734, PETRI_PLACES=220, PETRI_TRANSITIONS=162} [2024-06-21 19:11:20,285 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 192 predicate places. [2024-06-21 19:11:20,285 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 162 transitions, 1734 flow [2024-06-21 19:11:20,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:20,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:20,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:20,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:11:20,286 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:20,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1275624387, now seen corresponding path program 2 times [2024-06-21 19:11:20,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:20,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729430167] [2024-06-21 19:11:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:20,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:21,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:21,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729430167] [2024-06-21 19:11:21,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729430167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:21,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:21,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928080811] [2024-06-21 19:11:21,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:21,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:21,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:21,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:21,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 162 transitions, 1734 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:21,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:21,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:21,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:21,522 INFO L124 PetriNetUnfolderBase]: 359/689 cut-off events. [2024-06-21 19:11:21,522 INFO L125 PetriNetUnfolderBase]: For 47588/47588 co-relation queries the response was YES. [2024-06-21 19:11:21,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 689 events. 359/689 cut-off events. For 47588/47588 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3389 event pairs, 38 based on Foata normal form. 8/696 useless extension candidates. Maximal degree in co-relation 4318. Up to 500 conditions per place. [2024-06-21 19:11:21,528 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 122 selfloop transitions, 43 changer transitions 11/178 dead transitions. [2024-06-21 19:11:21,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 178 transitions, 2162 flow [2024-06-21 19:11:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 19:11:21,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2024-06-21 19:11:21,529 INFO L175 Difference]: Start difference. First operand has 220 places, 162 transitions, 1734 flow. Second operand 9 states and 107 transitions. [2024-06-21 19:11:21,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 178 transitions, 2162 flow [2024-06-21 19:11:21,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 178 transitions, 2050 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:21,599 INFO L231 Difference]: Finished difference. Result has 218 places, 159 transitions, 1691 flow [2024-06-21 19:11:21,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1691, PETRI_PLACES=218, PETRI_TRANSITIONS=159} [2024-06-21 19:11:21,599 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 190 predicate places. [2024-06-21 19:11:21,599 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 159 transitions, 1691 flow [2024-06-21 19:11:21,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:21,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:21,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:21,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:11:21,600 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:21,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:21,600 INFO L85 PathProgramCache]: Analyzing trace with hash 979295278, now seen corresponding path program 1 times [2024-06-21 19:11:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:21,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806043165] [2024-06-21 19:11:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:21,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:22,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:22,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806043165] [2024-06-21 19:11:22,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806043165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:22,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:22,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:11:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417163820] [2024-06-21 19:11:22,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:22,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:11:22,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:11:22,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:11:23,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:23,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 159 transitions, 1691 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:23,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:23,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:23,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:23,343 INFO L124 PetriNetUnfolderBase]: 338/647 cut-off events. [2024-06-21 19:11:23,344 INFO L125 PetriNetUnfolderBase]: For 32032/32032 co-relation queries the response was YES. [2024-06-21 19:11:23,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4101 conditions, 647 events. 338/647 cut-off events. For 32032/32032 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3140 event pairs, 96 based on Foata normal form. 1/647 useless extension candidates. Maximal degree in co-relation 4001. Up to 579 conditions per place. [2024-06-21 19:11:23,350 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 133 selfloop transitions, 33 changer transitions 0/168 dead transitions. [2024-06-21 19:11:23,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 168 transitions, 2167 flow [2024-06-21 19:11:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-21 19:11:23,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 19:11:23,352 INFO L175 Difference]: Start difference. First operand has 218 places, 159 transitions, 1691 flow. Second operand 10 states and 100 transitions. [2024-06-21 19:11:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 168 transitions, 2167 flow [2024-06-21 19:11:23,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 168 transitions, 2041 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:23,421 INFO L231 Difference]: Finished difference. Result has 215 places, 159 transitions, 1643 flow [2024-06-21 19:11:23,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1643, PETRI_PLACES=215, PETRI_TRANSITIONS=159} [2024-06-21 19:11:23,422 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 187 predicate places. [2024-06-21 19:11:23,422 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 159 transitions, 1643 flow [2024-06-21 19:11:23,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:23,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:23,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:23,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:11:23,422 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:23,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:23,423 INFO L85 PathProgramCache]: Analyzing trace with hash 979295495, now seen corresponding path program 3 times [2024-06-21 19:11:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:23,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634471336] [2024-06-21 19:11:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:24,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634471336] [2024-06-21 19:11:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634471336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:24,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:24,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:11:24,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408271708] [2024-06-21 19:11:24,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:24,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:11:24,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:11:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:11:24,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:24,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 159 transitions, 1643 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:24,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:24,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:24,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:24,899 INFO L124 PetriNetUnfolderBase]: 354/683 cut-off events. [2024-06-21 19:11:24,899 INFO L125 PetriNetUnfolderBase]: For 45395/45395 co-relation queries the response was YES. [2024-06-21 19:11:24,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 683 events. 354/683 cut-off events. For 45395/45395 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3368 event pairs, 106 based on Foata normal form. 10/692 useless extension candidates. Maximal degree in co-relation 4075. Up to 582 conditions per place. [2024-06-21 19:11:24,905 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 135 selfloop transitions, 25 changer transitions 12/174 dead transitions. [2024-06-21 19:11:24,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 174 transitions, 2187 flow [2024-06-21 19:11:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:11:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:11:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-21 19:11:24,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 19:11:24,906 INFO L175 Difference]: Start difference. First operand has 215 places, 159 transitions, 1643 flow. Second operand 11 states and 110 transitions. [2024-06-21 19:11:24,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 174 transitions, 2187 flow [2024-06-21 19:11:24,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 174 transitions, 2123 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:24,977 INFO L231 Difference]: Finished difference. Result has 218 places, 154 transitions, 1593 flow [2024-06-21 19:11:24,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1593, PETRI_PLACES=218, PETRI_TRANSITIONS=154} [2024-06-21 19:11:24,977 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 190 predicate places. [2024-06-21 19:11:24,977 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 154 transitions, 1593 flow [2024-06-21 19:11:24,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:24,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:24,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:24,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:11:24,982 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:24,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1853226519, now seen corresponding path program 4 times [2024-06-21 19:11:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:24,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723125187] [2024-06-21 19:11:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:26,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:26,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723125187] [2024-06-21 19:11:26,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723125187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:26,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:26,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:26,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889314355] [2024-06-21 19:11:26,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:26,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:26,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:26,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 154 transitions, 1593 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:26,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:26,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:26,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:26,444 INFO L124 PetriNetUnfolderBase]: 363/702 cut-off events. [2024-06-21 19:11:26,444 INFO L125 PetriNetUnfolderBase]: For 50264/50264 co-relation queries the response was YES. [2024-06-21 19:11:26,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4878 conditions, 702 events. 363/702 cut-off events. For 50264/50264 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3458 event pairs, 117 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 4778. Up to 556 conditions per place. [2024-06-21 19:11:26,450 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 145 selfloop transitions, 24 changer transitions 0/171 dead transitions. [2024-06-21 19:11:26,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 171 transitions, 2279 flow [2024-06-21 19:11:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 19:11:26,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3716475095785441 [2024-06-21 19:11:26,453 INFO L175 Difference]: Start difference. First operand has 218 places, 154 transitions, 1593 flow. Second operand 9 states and 97 transitions. [2024-06-21 19:11:26,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 171 transitions, 2279 flow [2024-06-21 19:11:26,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 171 transitions, 2197 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-21 19:11:26,531 INFO L231 Difference]: Finished difference. Result has 210 places, 155 transitions, 1603 flow [2024-06-21 19:11:26,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=210, PETRI_TRANSITIONS=155} [2024-06-21 19:11:26,531 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 182 predicate places. [2024-06-21 19:11:26,532 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 155 transitions, 1603 flow [2024-06-21 19:11:26,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:26,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:26,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:26,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:11:26,532 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:26,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:26,533 INFO L85 PathProgramCache]: Analyzing trace with hash 988499705, now seen corresponding path program 5 times [2024-06-21 19:11:26,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:26,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825533706] [2024-06-21 19:11:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:26,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:27,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:27,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825533706] [2024-06-21 19:11:27,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825533706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:27,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:27,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607345869] [2024-06-21 19:11:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:27,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:27,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 155 transitions, 1603 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:27,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:27,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:27,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:28,069 INFO L124 PetriNetUnfolderBase]: 397/776 cut-off events. [2024-06-21 19:11:28,070 INFO L125 PetriNetUnfolderBase]: For 69891/69891 co-relation queries the response was YES. [2024-06-21 19:11:28,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5598 conditions, 776 events. 397/776 cut-off events. For 69891/69891 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3917 event pairs, 131 based on Foata normal form. 8/783 useless extension candidates. Maximal degree in co-relation 5501. Up to 522 conditions per place. [2024-06-21 19:11:28,076 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 141 selfloop transitions, 23 changer transitions 10/176 dead transitions. [2024-06-21 19:11:28,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 176 transitions, 2311 flow [2024-06-21 19:11:28,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:11:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:11:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 19:11:28,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542319749216301 [2024-06-21 19:11:28,077 INFO L175 Difference]: Start difference. First operand has 210 places, 155 transitions, 1603 flow. Second operand 11 states and 113 transitions. [2024-06-21 19:11:28,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 176 transitions, 2311 flow [2024-06-21 19:11:28,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 176 transitions, 2247 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:28,167 INFO L231 Difference]: Finished difference. Result has 214 places, 152 transitions, 1568 flow [2024-06-21 19:11:28,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1568, PETRI_PLACES=214, PETRI_TRANSITIONS=152} [2024-06-21 19:11:28,168 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 186 predicate places. [2024-06-21 19:11:28,168 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 152 transitions, 1568 flow [2024-06-21 19:11:28,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:28,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:28,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:28,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:11:28,168 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:28,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 979302935, now seen corresponding path program 6 times [2024-06-21 19:11:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:28,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491832783] [2024-06-21 19:11:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:29,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491832783] [2024-06-21 19:11:29,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491832783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:29,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:29,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129645576] [2024-06-21 19:11:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:29,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:29,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 152 transitions, 1568 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:29,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:29,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:29,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:29,590 INFO L124 PetriNetUnfolderBase]: 365/712 cut-off events. [2024-06-21 19:11:29,590 INFO L125 PetriNetUnfolderBase]: For 59411/59411 co-relation queries the response was YES. [2024-06-21 19:11:29,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 712 events. 365/712 cut-off events. For 59411/59411 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3545 event pairs, 112 based on Foata normal form. 8/719 useless extension candidates. Maximal degree in co-relation 4766. Up to 621 conditions per place. [2024-06-21 19:11:29,595 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 132 selfloop transitions, 21 changer transitions 12/167 dead transitions. [2024-06-21 19:11:29,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 167 transitions, 2084 flow [2024-06-21 19:11:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:11:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:11:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-21 19:11:29,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-21 19:11:29,596 INFO L175 Difference]: Start difference. First operand has 214 places, 152 transitions, 1568 flow. Second operand 11 states and 106 transitions. [2024-06-21 19:11:29,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 167 transitions, 2084 flow [2024-06-21 19:11:29,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 167 transitions, 2034 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 19:11:29,684 INFO L231 Difference]: Finished difference. Result has 211 places, 148 transitions, 1537 flow [2024-06-21 19:11:29,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1537, PETRI_PLACES=211, PETRI_TRANSITIONS=148} [2024-06-21 19:11:29,685 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 183 predicate places. [2024-06-21 19:11:29,685 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 148 transitions, 1537 flow [2024-06-21 19:11:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:29,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:29,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:29,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:11:29,686 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:29,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1853234176, now seen corresponding path program 2 times [2024-06-21 19:11:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:29,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756597891] [2024-06-21 19:11:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:30,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:30,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756597891] [2024-06-21 19:11:30,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756597891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:30,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:30,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:30,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781940518] [2024-06-21 19:11:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:30,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:30,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:30,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:30,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 148 transitions, 1537 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:30,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:30,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:30,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:31,261 INFO L124 PetriNetUnfolderBase]: 343/665 cut-off events. [2024-06-21 19:11:31,261 INFO L125 PetriNetUnfolderBase]: For 43042/43042 co-relation queries the response was YES. [2024-06-21 19:11:31,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 665 events. 343/665 cut-off events. For 43042/43042 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3206 event pairs, 113 based on Foata normal form. 1/665 useless extension candidates. Maximal degree in co-relation 4463. Up to 619 conditions per place. [2024-06-21 19:11:31,266 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 131 selfloop transitions, 22 changer transitions 0/155 dead transitions. [2024-06-21 19:11:31,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 155 transitions, 1859 flow [2024-06-21 19:11:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-21 19:11:31,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 19:11:31,267 INFO L175 Difference]: Start difference. First operand has 211 places, 148 transitions, 1537 flow. Second operand 9 states and 87 transitions. [2024-06-21 19:11:31,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 155 transitions, 1859 flow [2024-06-21 19:11:31,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 155 transitions, 1797 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 19:11:31,336 INFO L231 Difference]: Finished difference. Result has 203 places, 148 transitions, 1525 flow [2024-06-21 19:11:31,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1525, PETRI_PLACES=203, PETRI_TRANSITIONS=148} [2024-06-21 19:11:31,337 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 175 predicate places. [2024-06-21 19:11:31,337 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 148 transitions, 1525 flow [2024-06-21 19:11:31,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:31,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:31,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:31,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:11:31,337 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:31,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1853233959, now seen corresponding path program 7 times [2024-06-21 19:11:31,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:31,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302053043] [2024-06-21 19:11:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:32,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:32,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302053043] [2024-06-21 19:11:32,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302053043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:32,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:32,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:11:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68206563] [2024-06-21 19:11:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:32,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:11:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:11:32,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:11:32,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:32,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 148 transitions, 1525 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:32,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:32,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:32,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:32,886 INFO L124 PetriNetUnfolderBase]: 352/688 cut-off events. [2024-06-21 19:11:32,886 INFO L125 PetriNetUnfolderBase]: For 49197/49197 co-relation queries the response was YES. [2024-06-21 19:11:32,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4430 conditions, 688 events. 352/688 cut-off events. For 49197/49197 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3366 event pairs, 116 based on Foata normal form. 10/697 useless extension candidates. Maximal degree in co-relation 4337. Up to 600 conditions per place. [2024-06-21 19:11:32,892 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 129 selfloop transitions, 18 changer transitions 12/161 dead transitions. [2024-06-21 19:11:32,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 161 transitions, 1915 flow [2024-06-21 19:11:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-21 19:11:32,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33793103448275863 [2024-06-21 19:11:32,894 INFO L175 Difference]: Start difference. First operand has 203 places, 148 transitions, 1525 flow. Second operand 10 states and 98 transitions. [2024-06-21 19:11:32,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 161 transitions, 1915 flow [2024-06-21 19:11:32,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 161 transitions, 1869 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:32,979 INFO L231 Difference]: Finished difference. Result has 206 places, 143 transitions, 1470 flow [2024-06-21 19:11:32,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1470, PETRI_PLACES=206, PETRI_TRANSITIONS=143} [2024-06-21 19:11:32,980 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 178 predicate places. [2024-06-21 19:11:32,980 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 143 transitions, 1470 flow [2024-06-21 19:11:32,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:32,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:32,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:32,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:11:32,980 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:32,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash 722587223, now seen corresponding path program 9 times [2024-06-21 19:11:32,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:32,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050559251] [2024-06-21 19:11:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:34,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050559251] [2024-06-21 19:11:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050559251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:34,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250547887] [2024-06-21 19:11:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:34,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:34,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:34,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 143 transitions, 1470 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:34,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:34,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:34,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:34,502 INFO L124 PetriNetUnfolderBase]: 332/648 cut-off events. [2024-06-21 19:11:34,502 INFO L125 PetriNetUnfolderBase]: For 38787/38787 co-relation queries the response was YES. [2024-06-21 19:11:34,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 648 events. 332/648 cut-off events. For 38787/38787 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3125 event pairs, 112 based on Foata normal form. 2/649 useless extension candidates. Maximal degree in co-relation 4179. Up to 599 conditions per place. [2024-06-21 19:11:34,508 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 130 selfloop transitions, 20 changer transitions 0/152 dead transitions. [2024-06-21 19:11:34,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 152 transitions, 1812 flow [2024-06-21 19:11:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-21 19:11:34,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32950191570881227 [2024-06-21 19:11:34,509 INFO L175 Difference]: Start difference. First operand has 206 places, 143 transitions, 1470 flow. Second operand 9 states and 86 transitions. [2024-06-21 19:11:34,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 152 transitions, 1812 flow [2024-06-21 19:11:34,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 152 transitions, 1752 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 19:11:34,578 INFO L231 Difference]: Finished difference. Result has 199 places, 144 transitions, 1482 flow [2024-06-21 19:11:34,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1482, PETRI_PLACES=199, PETRI_TRANSITIONS=144} [2024-06-21 19:11:34,578 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 171 predicate places. [2024-06-21 19:11:34,579 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 144 transitions, 1482 flow [2024-06-21 19:11:34,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:34,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:34,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:34,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:11:34,579 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:34,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2047381131, now seen corresponding path program 10 times [2024-06-21 19:11:34,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:34,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325800867] [2024-06-21 19:11:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:34,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:35,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325800867] [2024-06-21 19:11:35,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325800867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:35,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:35,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:35,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741689872] [2024-06-21 19:11:35,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:35,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:35,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:35,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:35,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 144 transitions, 1482 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:35,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:35,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:35,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:35,960 INFO L124 PetriNetUnfolderBase]: 336/655 cut-off events. [2024-06-21 19:11:35,961 INFO L125 PetriNetUnfolderBase]: For 36416/36416 co-relation queries the response was YES. [2024-06-21 19:11:35,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4276 conditions, 655 events. 336/655 cut-off events. For 36416/36416 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3158 event pairs, 62 based on Foata normal form. 2/652 useless extension candidates. Maximal degree in co-relation 4185. Up to 459 conditions per place. [2024-06-21 19:11:35,966 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 108 selfloop transitions, 44 changer transitions 0/154 dead transitions. [2024-06-21 19:11:35,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 154 transitions, 1832 flow [2024-06-21 19:11:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 19:11:35,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40229885057471265 [2024-06-21 19:11:35,968 INFO L175 Difference]: Start difference. First operand has 199 places, 144 transitions, 1482 flow. Second operand 9 states and 105 transitions. [2024-06-21 19:11:35,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 154 transitions, 1832 flow [2024-06-21 19:11:36,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 154 transitions, 1770 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:36,044 INFO L231 Difference]: Finished difference. Result has 200 places, 145 transitions, 1540 flow [2024-06-21 19:11:36,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1540, PETRI_PLACES=200, PETRI_TRANSITIONS=145} [2024-06-21 19:11:36,045 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 172 predicate places. [2024-06-21 19:11:36,045 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 145 transitions, 1540 flow [2024-06-21 19:11:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:36,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:36,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:36,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:11:36,046 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:36,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2047380976, now seen corresponding path program 3 times [2024-06-21 19:11:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806133726] [2024-06-21 19:11:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:37,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806133726] [2024-06-21 19:11:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806133726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:37,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020721007] [2024-06-21 19:11:37,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:37,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:37,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 145 transitions, 1540 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:37,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:37,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:37,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:37,672 INFO L124 PetriNetUnfolderBase]: 334/651 cut-off events. [2024-06-21 19:11:37,673 INFO L125 PetriNetUnfolderBase]: For 33442/33442 co-relation queries the response was YES. [2024-06-21 19:11:37,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4219 conditions, 651 events. 334/651 cut-off events. For 33442/33442 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3134 event pairs, 62 based on Foata normal form. 1/648 useless extension candidates. Maximal degree in co-relation 4128. Up to 454 conditions per place. [2024-06-21 19:11:37,678 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 107 selfloop transitions, 46 changer transitions 0/155 dead transitions. [2024-06-21 19:11:37,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 155 transitions, 1890 flow [2024-06-21 19:11:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 19:11:37,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2024-06-21 19:11:37,679 INFO L175 Difference]: Start difference. First operand has 200 places, 145 transitions, 1540 flow. Second operand 8 states and 100 transitions. [2024-06-21 19:11:37,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 155 transitions, 1890 flow [2024-06-21 19:11:37,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 155 transitions, 1780 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:37,747 INFO L231 Difference]: Finished difference. Result has 201 places, 147 transitions, 1561 flow [2024-06-21 19:11:37,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1561, PETRI_PLACES=201, PETRI_TRANSITIONS=147} [2024-06-21 19:11:37,748 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 173 predicate places. [2024-06-21 19:11:37,748 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 147 transitions, 1561 flow [2024-06-21 19:11:37,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:37,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:37,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:37,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:11:37,749 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:37,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2052743511, now seen corresponding path program 11 times [2024-06-21 19:11:37,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:37,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13483917] [2024-06-21 19:11:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:37,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:38,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:38,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13483917] [2024-06-21 19:11:38,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13483917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:38,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:38,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:38,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718995017] [2024-06-21 19:11:38,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:38,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:38,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:38,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:38,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:38,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:38,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 147 transitions, 1561 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:38,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:38,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:39,054 INFO L124 PetriNetUnfolderBase]: 338/659 cut-off events. [2024-06-21 19:11:39,054 INFO L125 PetriNetUnfolderBase]: For 36031/36031 co-relation queries the response was YES. [2024-06-21 19:11:39,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4298 conditions, 659 events. 338/659 cut-off events. For 36031/36031 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3189 event pairs, 62 based on Foata normal form. 2/657 useless extension candidates. Maximal degree in co-relation 4207. Up to 464 conditions per place. [2024-06-21 19:11:39,059 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 110 selfloop transitions, 45 changer transitions 0/157 dead transitions. [2024-06-21 19:11:39,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 157 transitions, 1919 flow [2024-06-21 19:11:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 19:11:39,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 19:11:39,080 INFO L175 Difference]: Start difference. First operand has 201 places, 147 transitions, 1561 flow. Second operand 9 states and 103 transitions. [2024-06-21 19:11:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 157 transitions, 1919 flow [2024-06-21 19:11:39,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 157 transitions, 1820 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:39,168 INFO L231 Difference]: Finished difference. Result has 204 places, 148 transitions, 1586 flow [2024-06-21 19:11:39,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1586, PETRI_PLACES=204, PETRI_TRANSITIONS=148} [2024-06-21 19:11:39,169 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 176 predicate places. [2024-06-21 19:11:39,169 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 148 transitions, 1586 flow [2024-06-21 19:11:39,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:39,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:39,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:11:39,169 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:39,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2052891381, now seen corresponding path program 12 times [2024-06-21 19:11:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:39,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223739640] [2024-06-21 19:11:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:40,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:40,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223739640] [2024-06-21 19:11:40,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223739640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:40,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:40,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:40,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964315853] [2024-06-21 19:11:40,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:40,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:40,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:40,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:40,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 148 transitions, 1586 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:40,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:40,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:40,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:40,938 INFO L124 PetriNetUnfolderBase]: 358/707 cut-off events. [2024-06-21 19:11:40,938 INFO L125 PetriNetUnfolderBase]: For 51235/51235 co-relation queries the response was YES. [2024-06-21 19:11:40,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4673 conditions, 707 events. 358/707 cut-off events. For 51235/51235 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3483 event pairs, 70 based on Foata normal form. 8/711 useless extension candidates. Maximal degree in co-relation 4580. Up to 260 conditions per place. [2024-06-21 19:11:40,944 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 104 selfloop transitions, 52 changer transitions 7/165 dead transitions. [2024-06-21 19:11:40,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 165 transitions, 2196 flow [2024-06-21 19:11:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 19:11:40,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-06-21 19:11:40,946 INFO L175 Difference]: Start difference. First operand has 204 places, 148 transitions, 1586 flow. Second operand 9 states and 114 transitions. [2024-06-21 19:11:40,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 165 transitions, 2196 flow [2024-06-21 19:11:41,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 165 transitions, 2082 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:41,055 INFO L231 Difference]: Finished difference. Result has 206 places, 145 transitions, 1534 flow [2024-06-21 19:11:41,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1534, PETRI_PLACES=206, PETRI_TRANSITIONS=145} [2024-06-21 19:11:41,056 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 178 predicate places. [2024-06-21 19:11:41,056 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 145 transitions, 1534 flow [2024-06-21 19:11:41,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:41,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:41,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:11:41,057 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:41,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2047173369, now seen corresponding path program 8 times [2024-06-21 19:11:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:41,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022454782] [2024-06-21 19:11:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:42,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:42,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022454782] [2024-06-21 19:11:42,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022454782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:42,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:42,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:11:42,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873178772] [2024-06-21 19:11:42,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:42,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:11:42,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:11:42,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:11:42,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 145 transitions, 1534 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:42,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:42,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:42,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:42,492 INFO L124 PetriNetUnfolderBase]: 354/702 cut-off events. [2024-06-21 19:11:42,492 INFO L125 PetriNetUnfolderBase]: For 56022/56022 co-relation queries the response was YES. [2024-06-21 19:11:42,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4580 conditions, 702 events. 354/702 cut-off events. For 56022/56022 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3500 event pairs, 78 based on Foata normal form. 11/709 useless extension candidates. Maximal degree in co-relation 4487. Up to 510 conditions per place. [2024-06-21 19:11:42,498 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 106 selfloop transitions, 39 changer transitions 12/159 dead transitions. [2024-06-21 19:11:42,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 159 transitions, 1922 flow [2024-06-21 19:11:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:42,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 19:11:42,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:11:42,499 INFO L175 Difference]: Start difference. First operand has 206 places, 145 transitions, 1534 flow. Second operand 10 states and 116 transitions. [2024-06-21 19:11:42,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 159 transitions, 1922 flow [2024-06-21 19:11:42,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 159 transitions, 1808 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:42,584 INFO L231 Difference]: Finished difference. Result has 207 places, 140 transitions, 1464 flow [2024-06-21 19:11:42,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1464, PETRI_PLACES=207, PETRI_TRANSITIONS=140} [2024-06-21 19:11:42,585 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 179 predicate places. [2024-06-21 19:11:42,585 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 140 transitions, 1464 flow [2024-06-21 19:11:42,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:42,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:42,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:42,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:11:42,585 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:42,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:42,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2047165929, now seen corresponding path program 9 times [2024-06-21 19:11:42,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:42,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851474090] [2024-06-21 19:11:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:42,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:43,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:43,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851474090] [2024-06-21 19:11:43,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851474090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:43,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:43,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:11:43,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845059685] [2024-06-21 19:11:43,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:43,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:11:43,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:11:43,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:11:43,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:43,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 140 transitions, 1464 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:43,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:43,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:43,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:43,936 INFO L124 PetriNetUnfolderBase]: 342/682 cut-off events. [2024-06-21 19:11:43,948 INFO L125 PetriNetUnfolderBase]: For 49798/49798 co-relation queries the response was YES. [2024-06-21 19:11:43,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4654 conditions, 682 events. 342/682 cut-off events. For 49798/49798 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3364 event pairs, 82 based on Foata normal form. 2/680 useless extension candidates. Maximal degree in co-relation 4560. Up to 487 conditions per place. [2024-06-21 19:11:43,954 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 111 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-06-21 19:11:43,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 154 transitions, 1928 flow [2024-06-21 19:11:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 19:11:43,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3896551724137931 [2024-06-21 19:11:43,956 INFO L175 Difference]: Start difference. First operand has 207 places, 140 transitions, 1464 flow. Second operand 10 states and 113 transitions. [2024-06-21 19:11:43,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 154 transitions, 1928 flow [2024-06-21 19:11:44,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 154 transitions, 1806 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-21 19:11:44,045 INFO L231 Difference]: Finished difference. Result has 202 places, 140 transitions, 1444 flow [2024-06-21 19:11:44,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1444, PETRI_PLACES=202, PETRI_TRANSITIONS=140} [2024-06-21 19:11:44,046 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 174 predicate places. [2024-06-21 19:11:44,046 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 140 transitions, 1444 flow [2024-06-21 19:11:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:44,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:44,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:11:44,047 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:44,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 728036362, now seen corresponding path program 1 times [2024-06-21 19:11:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:44,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474883819] [2024-06-21 19:11:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474883819] [2024-06-21 19:11:45,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474883819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:45,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:45,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146077319] [2024-06-21 19:11:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:45,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:45,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:45,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 140 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:45,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:45,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:45,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:45,499 INFO L124 PetriNetUnfolderBase]: 350/702 cut-off events. [2024-06-21 19:11:45,499 INFO L125 PetriNetUnfolderBase]: For 49265/49265 co-relation queries the response was YES. [2024-06-21 19:11:45,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 702 events. 350/702 cut-off events. For 49265/49265 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3487 event pairs, 67 based on Foata normal form. 6/707 useless extension candidates. Maximal degree in co-relation 4416. Up to 543 conditions per place. [2024-06-21 19:11:45,504 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 118 selfloop transitions, 12 changer transitions 24/156 dead transitions. [2024-06-21 19:11:45,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 156 transitions, 1796 flow [2024-06-21 19:11:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 19:11:45,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 19:11:45,506 INFO L175 Difference]: Start difference. First operand has 202 places, 140 transitions, 1444 flow. Second operand 8 states and 85 transitions. [2024-06-21 19:11:45,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 156 transitions, 1796 flow [2024-06-21 19:11:45,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 156 transitions, 1690 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:11:45,594 INFO L231 Difference]: Finished difference. Result has 201 places, 128 transitions, 1247 flow [2024-06-21 19:11:45,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1247, PETRI_PLACES=201, PETRI_TRANSITIONS=128} [2024-06-21 19:11:45,594 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 173 predicate places. [2024-06-21 19:11:45,594 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 128 transitions, 1247 flow [2024-06-21 19:11:45,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:45,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:45,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:45,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:11:45,595 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:45,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:45,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1139255400, now seen corresponding path program 2 times [2024-06-21 19:11:45,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:45,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872432382] [2024-06-21 19:11:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:45,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:46,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:46,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872432382] [2024-06-21 19:11:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872432382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:46,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525978871] [2024-06-21 19:11:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:46,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:46,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:46,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 128 transitions, 1247 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:46,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:46,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:46,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:47,095 INFO L124 PetriNetUnfolderBase]: 291/587 cut-off events. [2024-06-21 19:11:47,095 INFO L125 PetriNetUnfolderBase]: For 42550/42550 co-relation queries the response was YES. [2024-06-21 19:11:47,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3668 conditions, 587 events. 291/587 cut-off events. For 42550/42550 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2773 event pairs, 53 based on Foata normal form. 6/592 useless extension candidates. Maximal degree in co-relation 3578. Up to 443 conditions per place. [2024-06-21 19:11:47,099 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 97 selfloop transitions, 30 changer transitions 11/140 dead transitions. [2024-06-21 19:11:47,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 140 transitions, 1557 flow [2024-06-21 19:11:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-06-21 19:11:47,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2024-06-21 19:11:47,100 INFO L175 Difference]: Start difference. First operand has 201 places, 128 transitions, 1247 flow. Second operand 8 states and 84 transitions. [2024-06-21 19:11:47,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 140 transitions, 1557 flow [2024-06-21 19:11:47,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 140 transitions, 1483 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-21 19:11:47,160 INFO L231 Difference]: Finished difference. Result has 184 places, 123 transitions, 1182 flow [2024-06-21 19:11:47,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1182, PETRI_PLACES=184, PETRI_TRANSITIONS=123} [2024-06-21 19:11:47,161 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 156 predicate places. [2024-06-21 19:11:47,161 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 123 transitions, 1182 flow [2024-06-21 19:11:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:47,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:47,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:47,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:11:47,162 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:47,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1139370720, now seen corresponding path program 3 times [2024-06-21 19:11:47,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:47,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983550691] [2024-06-21 19:11:47,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:47,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:48,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:48,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983550691] [2024-06-21 19:11:48,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983550691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:48,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:48,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:11:48,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705622523] [2024-06-21 19:11:48,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:48,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:11:48,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:48,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:11:48,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:11:48,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:48,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 123 transitions, 1182 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:48,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:48,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:48,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:48,984 INFO L124 PetriNetUnfolderBase]: 280/570 cut-off events. [2024-06-21 19:11:48,984 INFO L125 PetriNetUnfolderBase]: For 31105/31105 co-relation queries the response was YES. [2024-06-21 19:11:48,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3405 conditions, 570 events. 280/570 cut-off events. For 31105/31105 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2688 event pairs, 60 based on Foata normal form. 6/575 useless extension candidates. Maximal degree in co-relation 3323. Up to 430 conditions per place. [2024-06-21 19:11:48,988 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 97 selfloop transitions, 17 changer transitions 23/139 dead transitions. [2024-06-21 19:11:48,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 139 transitions, 1500 flow [2024-06-21 19:11:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-06-21 19:11:48,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33448275862068966 [2024-06-21 19:11:48,989 INFO L175 Difference]: Start difference. First operand has 184 places, 123 transitions, 1182 flow. Second operand 10 states and 97 transitions. [2024-06-21 19:11:48,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 139 transitions, 1500 flow [2024-06-21 19:11:49,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 139 transitions, 1416 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 19:11:49,040 INFO L231 Difference]: Finished difference. Result has 182 places, 108 transitions, 1003 flow [2024-06-21 19:11:49,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1003, PETRI_PLACES=182, PETRI_TRANSITIONS=108} [2024-06-21 19:11:49,041 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 154 predicate places. [2024-06-21 19:11:49,041 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 108 transitions, 1003 flow [2024-06-21 19:11:49,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:49,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:49,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:11:49,042 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:49,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash -704226848, now seen corresponding path program 4 times [2024-06-21 19:11:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:49,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081676826] [2024-06-21 19:11:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:49,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:50,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:50,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081676826] [2024-06-21 19:11:50,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081676826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:50,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:50,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:11:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560913134] [2024-06-21 19:11:50,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:50,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:11:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:50,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:11:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:11:50,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:50,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 108 transitions, 1003 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:50,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:50,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:50,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:50,793 INFO L124 PetriNetUnfolderBase]: 247/503 cut-off events. [2024-06-21 19:11:50,795 INFO L125 PetriNetUnfolderBase]: For 27161/27161 co-relation queries the response was YES. [2024-06-21 19:11:50,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3014 conditions, 503 events. 247/503 cut-off events. For 27161/27161 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2273 event pairs, 56 based on Foata normal form. 6/508 useless extension candidates. Maximal degree in co-relation 2934. Up to 341 conditions per place. [2024-06-21 19:11:50,799 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 21 changer transitions 30/125 dead transitions. [2024-06-21 19:11:50,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 125 transitions, 1295 flow [2024-06-21 19:11:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:11:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:11:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 19:11:50,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35919540229885055 [2024-06-21 19:11:50,800 INFO L175 Difference]: Start difference. First operand has 182 places, 108 transitions, 1003 flow. Second operand 12 states and 125 transitions. [2024-06-21 19:11:50,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 125 transitions, 1295 flow [2024-06-21 19:11:50,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 125 transitions, 1135 flow, removed 9 selfloop flow, removed 31 redundant places. [2024-06-21 19:11:50,843 INFO L231 Difference]: Finished difference. Result has 158 places, 86 transitions, 732 flow [2024-06-21 19:11:50,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=732, PETRI_PLACES=158, PETRI_TRANSITIONS=86} [2024-06-21 19:11:50,844 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 130 predicate places. [2024-06-21 19:11:50,844 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 86 transitions, 732 flow [2024-06-21 19:11:50,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:50,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:50,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:50,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:11:50,844 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:50,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:50,845 INFO L85 PathProgramCache]: Analyzing trace with hash -690042488, now seen corresponding path program 5 times [2024-06-21 19:11:50,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:50,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349804256] [2024-06-21 19:11:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:50,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:51,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:51,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349804256] [2024-06-21 19:11:51,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349804256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:51,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:51,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:11:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837553793] [2024-06-21 19:11:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:51,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:11:51,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:11:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:11:51,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:51,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 86 transitions, 732 flow. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:51,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:51,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:51,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:52,169 INFO L124 PetriNetUnfolderBase]: 189/401 cut-off events. [2024-06-21 19:11:52,169 INFO L125 PetriNetUnfolderBase]: For 18437/18437 co-relation queries the response was YES. [2024-06-21 19:11:52,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 401 events. 189/401 cut-off events. For 18437/18437 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1715 event pairs, 32 based on Foata normal form. 6/406 useless extension candidates. Maximal degree in co-relation 2148. Up to 242 conditions per place. [2024-06-21 19:11:52,171 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 51 selfloop transitions, 3 changer transitions 43/99 dead transitions. [2024-06-21 19:11:52,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 99 transitions, 962 flow [2024-06-21 19:11:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 19:11:52,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36398467432950193 [2024-06-21 19:11:52,173 INFO L175 Difference]: Start difference. First operand has 158 places, 86 transitions, 732 flow. Second operand 9 states and 95 transitions. [2024-06-21 19:11:52,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 99 transitions, 962 flow [2024-06-21 19:11:52,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 99 transitions, 898 flow, removed 9 selfloop flow, removed 17 redundant places. [2024-06-21 19:11:52,191 INFO L231 Difference]: Finished difference. Result has 136 places, 55 transitions, 474 flow [2024-06-21 19:11:52,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=474, PETRI_PLACES=136, PETRI_TRANSITIONS=55} [2024-06-21 19:11:52,192 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 108 predicate places. [2024-06-21 19:11:52,192 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 55 transitions, 474 flow [2024-06-21 19:11:52,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 9 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:52,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:52,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:52,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:11:52,193 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:52,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:52,193 INFO L85 PathProgramCache]: Analyzing trace with hash 932039430, now seen corresponding path program 1 times [2024-06-21 19:11:52,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:52,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568797833] [2024-06-21 19:11:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:52,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:53,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:53,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568797833] [2024-06-21 19:11:53,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568797833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:53,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:53,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:11:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776404244] [2024-06-21 19:11:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:53,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:11:53,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:53,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:11:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:11:53,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:53,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 55 transitions, 474 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:53,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:53,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:53,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:53,953 INFO L124 PetriNetUnfolderBase]: 153/316 cut-off events. [2024-06-21 19:11:53,954 INFO L125 PetriNetUnfolderBase]: For 16161/16161 co-relation queries the response was YES. [2024-06-21 19:11:53,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1973 conditions, 316 events. 153/316 cut-off events. For 16161/16161 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1288 event pairs, 42 based on Foata normal form. 6/321 useless extension candidates. Maximal degree in co-relation 1913. Up to 124 conditions per place. [2024-06-21 19:11:53,955 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 42 selfloop transitions, 17 changer transitions 8/69 dead transitions. [2024-06-21 19:11:53,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 69 transitions, 726 flow [2024-06-21 19:11:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-06-21 19:11:53,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32413793103448274 [2024-06-21 19:11:53,956 INFO L175 Difference]: Start difference. First operand has 136 places, 55 transitions, 474 flow. Second operand 10 states and 94 transitions. [2024-06-21 19:11:53,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 69 transitions, 726 flow [2024-06-21 19:11:53,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 69 transitions, 640 flow, removed 37 selfloop flow, removed 23 redundant places. [2024-06-21 19:11:53,964 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 423 flow [2024-06-21 19:11:53,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=423, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2024-06-21 19:11:53,965 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-06-21 19:11:53,965 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 423 flow [2024-06-21 19:11:53,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:53,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:53,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:53,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:11:53,965 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:53,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash 925552680, now seen corresponding path program 2 times [2024-06-21 19:11:53,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:53,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617331038] [2024-06-21 19:11:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:53,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:55,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:55,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617331038] [2024-06-21 19:11:55,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617331038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:55,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:55,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:55,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372347156] [2024-06-21 19:11:55,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:55,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:55,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:55,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:55,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 423 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:55,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:55,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:55,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:55,442 INFO L124 PetriNetUnfolderBase]: 114/239 cut-off events. [2024-06-21 19:11:55,442 INFO L125 PetriNetUnfolderBase]: For 3669/3669 co-relation queries the response was YES. [2024-06-21 19:11:55,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065 conditions, 239 events. 114/239 cut-off events. For 3669/3669 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 870 event pairs, 26 based on Foata normal form. 16/254 useless extension candidates. Maximal degree in co-relation 1023. Up to 124 conditions per place. [2024-06-21 19:11:55,444 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 33 selfloop transitions, 10 changer transitions 15/60 dead transitions. [2024-06-21 19:11:55,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 60 transitions, 571 flow [2024-06-21 19:11:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 77 transitions. [2024-06-21 19:11:55,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33189655172413796 [2024-06-21 19:11:55,445 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 423 flow. Second operand 8 states and 77 transitions. [2024-06-21 19:11:55,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 60 transitions, 571 flow [2024-06-21 19:11:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 60 transitions, 524 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 19:11:55,448 INFO L231 Difference]: Finished difference. Result has 84 places, 42 transitions, 313 flow [2024-06-21 19:11:55,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=313, PETRI_PLACES=84, PETRI_TRANSITIONS=42} [2024-06-21 19:11:55,449 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-21 19:11:55,449 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 42 transitions, 313 flow [2024-06-21 19:11:55,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:55,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:55,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:11:55,449 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:55,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1902373722, now seen corresponding path program 6 times [2024-06-21 19:11:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:55,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987160969] [2024-06-21 19:11:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:56,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:56,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987160969] [2024-06-21 19:11:56,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987160969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:56,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:56,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:56,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136397036] [2024-06-21 19:11:56,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:56,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:56,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:56,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 19:11:56,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 42 transitions, 313 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:56,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:56,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 19:11:56,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:57,141 INFO L124 PetriNetUnfolderBase]: 81/176 cut-off events. [2024-06-21 19:11:57,141 INFO L125 PetriNetUnfolderBase]: For 1866/1866 co-relation queries the response was YES. [2024-06-21 19:11:57,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 176 events. 81/176 cut-off events. For 1866/1866 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 551 event pairs, 16 based on Foata normal form. 6/181 useless extension candidates. Maximal degree in co-relation 753. Up to 114 conditions per place. [2024-06-21 19:11:57,142 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 29 selfloop transitions, 8 changer transitions 12/51 dead transitions. [2024-06-21 19:11:57,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 51 transitions, 437 flow [2024-06-21 19:11:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-06-21 19:11:57,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2988505747126437 [2024-06-21 19:11:57,143 INFO L175 Difference]: Start difference. First operand has 84 places, 42 transitions, 313 flow. Second operand 9 states and 78 transitions. [2024-06-21 19:11:57,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 51 transitions, 437 flow [2024-06-21 19:11:57,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 51 transitions, 386 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 19:11:57,146 INFO L231 Difference]: Finished difference. Result has 75 places, 36 transitions, 247 flow [2024-06-21 19:11:57,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=247, PETRI_PLACES=75, PETRI_TRANSITIONS=36} [2024-06-21 19:11:57,146 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2024-06-21 19:11:57,146 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 36 transitions, 247 flow [2024-06-21 19:11:57,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:57,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:57,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:57,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:11:57,147 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:57,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash 504736730, now seen corresponding path program 7 times [2024-06-21 19:11:57,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:57,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573674596] [2024-06-21 19:11:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:57,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:58,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:58,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573674596] [2024-06-21 19:11:58,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573674596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:58,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:58,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:58,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559565301] [2024-06-21 19:11:58,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:58,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:58,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:58,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:58,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:58,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:11:58,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 36 transitions, 247 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:58,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:58,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:11:58,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:58,565 INFO L124 PetriNetUnfolderBase]: 71/154 cut-off events. [2024-06-21 19:11:58,565 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2024-06-21 19:11:58,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 154 events. 71/154 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 459 event pairs, 14 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 615. Up to 77 conditions per place. [2024-06-21 19:11:58,566 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 24 selfloop transitions, 10 changer transitions 10/46 dead transitions. [2024-06-21 19:11:58,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 46 transitions, 359 flow [2024-06-21 19:11:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-06-21 19:11:58,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34099616858237547 [2024-06-21 19:11:58,567 INFO L175 Difference]: Start difference. First operand has 75 places, 36 transitions, 247 flow. Second operand 9 states and 89 transitions. [2024-06-21 19:11:58,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 46 transitions, 359 flow [2024-06-21 19:11:58,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 46 transitions, 320 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-06-21 19:11:58,569 INFO L231 Difference]: Finished difference. Result has 66 places, 32 transitions, 208 flow [2024-06-21 19:11:58,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=208, PETRI_PLACES=66, PETRI_TRANSITIONS=32} [2024-06-21 19:11:58,569 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2024-06-21 19:11:58,570 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 32 transitions, 208 flow [2024-06-21 19:11:58,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:58,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:58,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:11:58,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:11:58,570 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:11:58,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash 784997520, now seen corresponding path program 8 times [2024-06-21 19:11:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:58,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239045278] [2024-06-21 19:11:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:58,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:11:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239045278] [2024-06-21 19:11:59,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239045278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:59,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:11:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134968137] [2024-06-21 19:11:59,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:59,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:11:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:11:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:12:00,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:12:00,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 32 transitions, 208 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:00,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:00,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:12:00,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:00,312 INFO L124 PetriNetUnfolderBase]: 66/147 cut-off events. [2024-06-21 19:12:00,313 INFO L125 PetriNetUnfolderBase]: For 1411/1411 co-relation queries the response was YES. [2024-06-21 19:12:00,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 147 events. 66/147 cut-off events. For 1411/1411 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 426 event pairs, 20 based on Foata normal form. 8/154 useless extension candidates. Maximal degree in co-relation 578. Up to 75 conditions per place. [2024-06-21 19:12:00,313 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 21 selfloop transitions, 8 changer transitions 16/47 dead transitions. [2024-06-21 19:12:00,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 47 transitions, 348 flow [2024-06-21 19:12:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:12:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:12:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 113 transitions. [2024-06-21 19:12:00,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32471264367816094 [2024-06-21 19:12:00,314 INFO L175 Difference]: Start difference. First operand has 66 places, 32 transitions, 208 flow. Second operand 12 states and 113 transitions. [2024-06-21 19:12:00,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 47 transitions, 348 flow [2024-06-21 19:12:00,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 47 transitions, 322 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 19:12:00,316 INFO L231 Difference]: Finished difference. Result has 66 places, 26 transitions, 165 flow [2024-06-21 19:12:00,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=165, PETRI_PLACES=66, PETRI_TRANSITIONS=26} [2024-06-21 19:12:00,316 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2024-06-21 19:12:00,316 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 26 transitions, 165 flow [2024-06-21 19:12:00,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:00,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:00,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:12:00,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:12:00,317 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:12:00,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:00,317 INFO L85 PathProgramCache]: Analyzing trace with hash 682110236, now seen corresponding path program 3 times [2024-06-21 19:12:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:00,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452336203] [2024-06-21 19:12:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:00,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:01,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:01,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452336203] [2024-06-21 19:12:01,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452336203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:01,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:01,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:12:01,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844711072] [2024-06-21 19:12:01,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:12:01,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:12:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:12:01,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:12:01,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 26 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:01,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:01,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:12:01,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:01,814 INFO L124 PetriNetUnfolderBase]: 51/118 cut-off events. [2024-06-21 19:12:01,814 INFO L125 PetriNetUnfolderBase]: For 903/903 co-relation queries the response was YES. [2024-06-21 19:12:01,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 118 events. 51/118 cut-off events. For 903/903 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 317 event pairs, 12 based on Foata normal form. 6/123 useless extension candidates. Maximal degree in co-relation 448. Up to 57 conditions per place. [2024-06-21 19:12:01,815 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 18 selfloop transitions, 6 changer transitions 11/37 dead transitions. [2024-06-21 19:12:01,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 37 transitions, 261 flow [2024-06-21 19:12:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:12:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:12:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-06-21 19:12:01,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32413793103448274 [2024-06-21 19:12:01,816 INFO L175 Difference]: Start difference. First operand has 66 places, 26 transitions, 165 flow. Second operand 10 states and 94 transitions. [2024-06-21 19:12:01,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 37 transitions, 261 flow [2024-06-21 19:12:01,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 37 transitions, 223 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-21 19:12:01,817 INFO L231 Difference]: Finished difference. Result has 55 places, 22 transitions, 116 flow [2024-06-21 19:12:01,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=116, PETRI_PLACES=55, PETRI_TRANSITIONS=22} [2024-06-21 19:12:01,817 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-06-21 19:12:01,818 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 22 transitions, 116 flow [2024-06-21 19:12:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:01,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:01,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:12:01,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:12:01,818 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:12:01,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:01,818 INFO L85 PathProgramCache]: Analyzing trace with hash 675443996, now seen corresponding path program 4 times [2024-06-21 19:12:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:01,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158030169] [2024-06-21 19:12:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:01,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:02,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:02,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158030169] [2024-06-21 19:12:02,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158030169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:02,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:02,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:12:02,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961770618] [2024-06-21 19:12:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:02,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:12:02,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:12:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:12:03,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 19:12:03,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 22 transitions, 116 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:03,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:03,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 19:12:03,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:03,190 INFO L124 PetriNetUnfolderBase]: 22/59 cut-off events. [2024-06-21 19:12:03,190 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2024-06-21 19:12:03,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 59 events. 22/59 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 87 event pairs, 4 based on Foata normal form. 8/66 useless extension candidates. Maximal degree in co-relation 178. Up to 32 conditions per place. [2024-06-21 19:12:03,191 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2024-06-21 19:12:03,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 27 transitions, 158 flow [2024-06-21 19:12:03,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:12:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:12:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 86 transitions. [2024-06-21 19:12:03,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296551724137931 [2024-06-21 19:12:03,192 INFO L175 Difference]: Start difference. First operand has 55 places, 22 transitions, 116 flow. Second operand 10 states and 86 transitions. [2024-06-21 19:12:03,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 27 transitions, 158 flow [2024-06-21 19:12:03,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 27 transitions, 126 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 19:12:03,192 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-21 19:12:03,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-21 19:12:03,193 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-21 19:12:03,193 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-21 19:12:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:03,195 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 19:12:03,196 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 19:12:03,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 19:12:03,199 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 19:12:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:12:03,200 INFO L445 BasicCegarLoop]: Path program histogram: [12, 9, 9, 8, 8, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:12:03,202 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 19:12:03,203 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 19:12:03,206 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 19:12:03,206 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 19:12:03,207 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 07:12:03 BasicIcfg [2024-06-21 19:12:03,207 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 19:12:03,207 INFO L158 Benchmark]: Toolchain (without parser) took 120624.20ms. Allocated memory was 142.6MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 112.3MB in the beginning and 755.1MB in the end (delta: -642.8MB). Peak memory consumption was 770.7MB. Max. memory is 16.1GB. [2024-06-21 19:12:03,207 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 19:12:03,207 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 19:12:03,208 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.13ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 82.4MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2024-06-21 19:12:03,208 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.37ms. Allocated memory is still 142.6MB. Free memory was 82.4MB in the beginning and 78.8MB in the end (delta: 3.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 19:12:03,208 INFO L158 Benchmark]: Boogie Preprocessor took 75.00ms. Allocated memory is still 142.6MB. Free memory was 78.8MB in the beginning and 75.1MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 19:12:03,209 INFO L158 Benchmark]: RCFGBuilder took 699.66ms. Allocated memory is still 142.6MB. Free memory was 75.1MB in the beginning and 72.2MB in the end (delta: 2.9MB). Peak memory consumption was 26.0MB. Max. memory is 16.1GB. [2024-06-21 19:12:03,209 INFO L158 Benchmark]: TraceAbstraction took 119302.53ms. Allocated memory was 142.6MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 71.6MB in the beginning and 755.1MB in the end (delta: -683.5MB). Peak memory consumption was 730.0MB. Max. memory is 16.1GB. [2024-06-21 19:12:03,210 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 142.6MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 115.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 480.13ms. Allocated memory is still 142.6MB. Free memory was 111.8MB in the beginning and 82.4MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.37ms. Allocated memory is still 142.6MB. Free memory was 82.4MB in the beginning and 78.8MB in the end (delta: 3.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.00ms. Allocated memory is still 142.6MB. Free memory was 78.8MB in the beginning and 75.1MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 699.66ms. Allocated memory is still 142.6MB. Free memory was 75.1MB in the beginning and 72.2MB in the end (delta: 2.9MB). Peak memory consumption was 26.0MB. Max. memory is 16.1GB. * TraceAbstraction took 119302.53ms. Allocated memory was 142.6MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 71.6MB in the beginning and 755.1MB in the end (delta: -683.5MB). Peak memory consumption was 730.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 795]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 796]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 46 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 119.2s, OverallIterations: 96, TraceHistogramMax: 1, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3884 SdHoareTripleChecker+Valid, 17.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3139 mSDsluCounter, 2084 SdHoareTripleChecker+Invalid, 14.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1622 mSDsCounter, 970 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24552 IncrementalHoareTripleChecker+Invalid, 25522 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 970 mSolverCounterUnsat, 462 mSDtfsCounter, 24552 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 818 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 807 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 21.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1766occurred in iteration=67, InterpolantAutomatonStates: 793, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 86.3s InterpolantComputationTime, 1399 NumberOfCodeBlocks, 1399 NumberOfCodeBlocksAsserted, 96 NumberOfCheckSat, 1303 ConstructedInterpolants, 0 QuantifiedInterpolants, 61194 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 96 InterpolantComputations, 96 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 19:12:03,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE