./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:35:06,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:35:06,816 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:35:06,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:35:06,819 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:35:06,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:35:06,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:35:06,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:35:06,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:35:06,856 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:35:06,856 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:35:06,856 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:35:06,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:35:06,857 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:35:06,858 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:35:06,858 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:35:06,858 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:35:06,858 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:35:06,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:35:06,858 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:35:06,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:35:06,859 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:35:06,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:35:06,859 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:35:06,859 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:35:06,859 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:35:06,860 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:35:06,860 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:35:06,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:35:06,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:35:06,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:35:06,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:35:06,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:06,861 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:35:06,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:35:06,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:35:07,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:35:07,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:35:07,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:35:07,099 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:35:07,108 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:35:07,109 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 12:35:07,288 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:35:07,289 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:35:07,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-14 12:35:08,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:35:08,550 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:35:08,551 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-14 12:35:08,572 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839e5db91/3e49502838244d9ebf80ae9c78c03163/FLAGb5e3a95f2 [2024-06-14 12:35:08,582 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/839e5db91/3e49502838244d9ebf80ae9c78c03163 [2024-06-14 12:35:08,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:35:08,584 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:35:08,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:08,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:35:08,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:35:08,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:07" (1/2) ... [2024-06-14 12:35:08,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40396549 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:08, skipping insertion in model container [2024-06-14 12:35:08,591 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:07" (1/2) ... [2024-06-14 12:35:08,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74112e1e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:35:08, skipping insertion in model container [2024-06-14 12:35:08,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:08" (2/2) ... [2024-06-14 12:35:08,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40396549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:08, skipping insertion in model container [2024-06-14 12:35:08,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:35:08" (2/2) ... [2024-06-14 12:35:08,593 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:35:08,682 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:35:08,683 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:35:08,683 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:35:08,683 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:35:08,684 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:35:08,684 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:35:08,684 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-14 12:35:08,720 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:35:09,044 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:09,058 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:35:09,171 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:35:09,205 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:35:09,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09 WrapperNode [2024-06-14 12:35:09,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:35:09,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:09,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:35:09,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:35:09,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,265 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-14 12:35:09,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:35:09,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:35:09,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:35:09,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:35:09,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,298 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]. [2024-06-14 12:35:09,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,325 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,328 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,329 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:35:09,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:35:09,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:35:09,345 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:35:09,346 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (1/1) ... [2024-06-14 12:35:09,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:35:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:35:09,377 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) [2024-06-14 12:35:09,421 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 [2024-06-14 12:35:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:35:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:35:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:35:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:35:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:35:09,447 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:35:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:35:09,447 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:35:09,447 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:35:09,447 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:35:09,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:35:09,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:35:09,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:35:09,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:35:09,450 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:35:09,562 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:35:09,564 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:35:09,929 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:35:09,929 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:35:10,117 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:35:10,117 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:35:10,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:10 BoogieIcfgContainer [2024-06-14 12:35:10,118 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:35:10,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:35:10,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:35:10,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:35:10,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:35:07" (1/4) ... [2024-06-14 12:35:10,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5bb502 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:35:10, skipping insertion in model container [2024-06-14 12:35:10,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:35:08" (2/4) ... [2024-06-14 12:35:10,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5bb502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:35:10, skipping insertion in model container [2024-06-14 12:35:10,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:35:09" (3/4) ... [2024-06-14 12:35:10,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5bb502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:35:10, skipping insertion in model container [2024-06-14 12:35:10,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:35:10" (4/4) ... [2024-06-14 12:35:10,128 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-14 12:35:10,144 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:35:10,144 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:35:10,144 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:35:10,209 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:35:10,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:35:10,274 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-14 12:35:10,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:10,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:35:10,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-14 12:35:10,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-14 12:35:10,292 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:35:10,298 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;@621c80d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:35:10,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:35:10,303 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:35:10,303 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:35:10,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:35:10,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:10,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:35:10,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:10,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash -565529638, now seen corresponding path program 1 times [2024-06-14 12:35:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:10,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546012884] [2024-06-14 12:35:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:11,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546012884] [2024-06-14 12:35:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546012884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:11,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:11,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:35:11,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473644931] [2024-06-14 12:35:11,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:11,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:35:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:35:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:35:11,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:11,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:11,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:11,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:11,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:12,840 INFO L124 PetriNetUnfolderBase]: 9587/13194 cut-off events. [2024-06-14 12:35:12,840 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-14 12:35:12,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26604 conditions, 13194 events. 9587/13194 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70125 event pairs, 7462 based on Foata normal form. 1/13009 useless extension candidates. Maximal degree in co-relation 26588. Up to 13017 conditions per place. [2024-06-14 12:35:12,909 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 45 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-14 12:35:12,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 233 flow [2024-06-14 12:35:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:35:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:35:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-14 12:35:12,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-14 12:35:12,921 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 93 transitions. [2024-06-14 12:35:12,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 233 flow [2024-06-14 12:35:12,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:12,927 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-14 12:35:12,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 12:35:12,931 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-14 12:35:12,932 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-14 12:35:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:12,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:12,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:12,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:35:12,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:12,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:12,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1986891129, now seen corresponding path program 1 times [2024-06-14 12:35:12,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:12,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299864705] [2024-06-14 12:35:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:12,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:13,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:13,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299864705] [2024-06-14 12:35:13,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299864705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:13,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:13,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:35:13,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019505346] [2024-06-14 12:35:13,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:13,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:35:13,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:35:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:35:13,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:13,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:13,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:13,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:13,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:15,167 INFO L124 PetriNetUnfolderBase]: 9577/13188 cut-off events. [2024-06-14 12:35:15,168 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2024-06-14 12:35:15,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30039 conditions, 13188 events. 9577/13188 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70075 event pairs, 6775 based on Foata normal form. 4/13189 useless extension candidates. Maximal degree in co-relation 30024. Up to 12982 conditions per place. [2024-06-14 12:35:15,235 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 55 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-14 12:35:15,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 325 flow [2024-06-14 12:35:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:35:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:35:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-14 12:35:15,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-14 12:35:15,238 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 120 transitions. [2024-06-14 12:35:15,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 325 flow [2024-06-14 12:35:15,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:35:15,241 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-14 12:35:15,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-14 12:35:15,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-14 12:35:15,243 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-14 12:35:15,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:15,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:15,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:15,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:35:15,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:15,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:15,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1464083749, now seen corresponding path program 1 times [2024-06-14 12:35:15,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:15,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559646030] [2024-06-14 12:35:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:15,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:15,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:15,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559646030] [2024-06-14 12:35:15,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559646030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:35:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208259769] [2024-06-14 12:35:15,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:15,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:35:15,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:35:15,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:35:16,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:16,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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) [2024-06-14 12:35:16,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:16,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:16,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:17,439 INFO L124 PetriNetUnfolderBase]: 9685/13380 cut-off events. [2024-06-14 12:35:17,439 INFO L125 PetriNetUnfolderBase]: For 7314/7314 co-relation queries the response was YES. [2024-06-14 12:35:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33921 conditions, 13380 events. 9685/13380 cut-off events. For 7314/7314 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71673 event pairs, 5476 based on Foata normal form. 10/13375 useless extension candidates. Maximal degree in co-relation 33904. Up to 12955 conditions per place. [2024-06-14 12:35:17,520 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 75 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-14 12:35:17,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 102 transitions, 549 flow [2024-06-14 12:35:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-14 12:35:17,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6115384615384616 [2024-06-14 12:35:17,522 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 159 transitions. [2024-06-14 12:35:17,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 102 transitions, 549 flow [2024-06-14 12:35:17,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 102 transitions, 530 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:35:17,526 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 312 flow [2024-06-14 12:35:17,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-14 12:35:17,527 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-14 12:35:17,527 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 312 flow [2024-06-14 12:35:17,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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) [2024-06-14 12:35:17,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:17,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:17,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:35:17,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:17,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:17,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1858043112, now seen corresponding path program 1 times [2024-06-14 12:35:17,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:17,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766027939] [2024-06-14 12:35:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:18,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766027939] [2024-06-14 12:35:18,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766027939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:18,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:18,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:35:18,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276641156] [2024-06-14 12:35:18,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:18,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:35:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:35:18,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:35:18,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:18,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-14 12:35:18,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:18,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:18,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:20,132 INFO L124 PetriNetUnfolderBase]: 9731/13427 cut-off events. [2024-06-14 12:35:20,133 INFO L125 PetriNetUnfolderBase]: For 17604/17604 co-relation queries the response was YES. [2024-06-14 12:35:20,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40338 conditions, 13427 events. 9731/13427 cut-off events. For 17604/17604 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 71515 event pairs, 4763 based on Foata normal form. 10/13422 useless extension candidates. Maximal degree in co-relation 40318. Up to 12951 conditions per place. [2024-06-14 12:35:20,206 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 86 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2024-06-14 12:35:20,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 118 transitions, 730 flow [2024-06-14 12:35:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-14 12:35:20,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025641025641025 [2024-06-14 12:35:20,208 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 312 flow. Second operand 6 states and 188 transitions. [2024-06-14 12:35:20,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 118 transitions, 730 flow [2024-06-14 12:35:20,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 718 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:35:20,219 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 406 flow [2024-06-14 12:35:20,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-14 12:35:20,220 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-14 12:35:20,220 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 406 flow [2024-06-14 12:35:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-14 12:35:20,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:20,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:20,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:35:20,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:20,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1764760668, now seen corresponding path program 1 times [2024-06-14 12:35:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:20,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434292972] [2024-06-14 12:35:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:21,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:21,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434292972] [2024-06-14 12:35:21,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434292972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:21,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:21,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:21,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191306604] [2024-06-14 12:35:21,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:21,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:21,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:21,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:21,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:21,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-14 12:35:21,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:21,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:21,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-14 12:35:21,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:22,802 INFO L124 PetriNetUnfolderBase]: 9946/13779 cut-off events. [2024-06-14 12:35:22,803 INFO L125 PetriNetUnfolderBase]: For 28410/28414 co-relation queries the response was YES. [2024-06-14 12:35:22,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45886 conditions, 13779 events. 9946/13779 cut-off events. For 28410/28414 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74041 event pairs, 3760 based on Foata normal form. 41/13814 useless extension candidates. Maximal degree in co-relation 45863. Up to 12888 conditions per place. [2024-06-14 12:35:22,888 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 101 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-14 12:35:22,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 151 transitions, 1082 flow [2024-06-14 12:35:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-14 12:35:22,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-14 12:35:22,891 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 406 flow. Second operand 7 states and 222 transitions. [2024-06-14 12:35:22,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 151 transitions, 1082 flow [2024-06-14 12:35:22,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 151 transitions, 1016 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:22,903 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 665 flow [2024-06-14 12:35:22,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-14 12:35:22,904 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-14 12:35:22,904 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 665 flow [2024-06-14 12:35:22,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:22,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:22,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:35:22,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:22,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2114653015, now seen corresponding path program 1 times [2024-06-14 12:35:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867334271] [2024-06-14 12:35:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:22,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:23,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:23,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867334271] [2024-06-14 12:35:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867334271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:23,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:23,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:35:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798545986] [2024-06-14 12:35:23,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:35:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:35:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:35:23,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:23,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 665 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:23,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:23,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:23,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:24,985 INFO L124 PetriNetUnfolderBase]: 9928/13756 cut-off events. [2024-06-14 12:35:24,985 INFO L125 PetriNetUnfolderBase]: For 51028/51028 co-relation queries the response was YES. [2024-06-14 12:35:25,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53079 conditions, 13756 events. 9928/13756 cut-off events. For 51028/51028 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73994 event pairs, 4704 based on Foata normal form. 6/13759 useless extension candidates. Maximal degree in co-relation 53051. Up to 13489 conditions per place. [2024-06-14 12:35:25,082 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 86 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-06-14 12:35:25,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 907 flow [2024-06-14 12:35:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 12:35:25,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-14 12:35:25,083 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 665 flow. Second operand 5 states and 124 transitions. [2024-06-14 12:35:25,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 907 flow [2024-06-14 12:35:25,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 857 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-14 12:35:25,123 INFO L231 Difference]: Finished difference. Result has 79 places, 88 transitions, 655 flow [2024-06-14 12:35:25,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=655, PETRI_PLACES=79, PETRI_TRANSITIONS=88} [2024-06-14 12:35:25,123 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-14 12:35:25,124 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 88 transitions, 655 flow [2024-06-14 12:35:25,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:25,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:25,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:35:25,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:25,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:25,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1526551322, now seen corresponding path program 1 times [2024-06-14 12:35:25,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:25,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840258334] [2024-06-14 12:35:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:25,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:25,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840258334] [2024-06-14 12:35:25,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840258334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:25,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:25,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:25,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207620121] [2024-06-14 12:35:25,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:25,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:25,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:25,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:25,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:26,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:26,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 88 transitions, 655 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:26,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:26,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:26,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:27,508 INFO L124 PetriNetUnfolderBase]: 9954/13783 cut-off events. [2024-06-14 12:35:27,509 INFO L125 PetriNetUnfolderBase]: For 56172/56172 co-relation queries the response was YES. [2024-06-14 12:35:27,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53386 conditions, 13783 events. 9954/13783 cut-off events. For 56172/56172 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73865 event pairs, 4443 based on Foata normal form. 12/13790 useless extension candidates. Maximal degree in co-relation 53354. Up to 13336 conditions per place. [2024-06-14 12:35:27,578 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 93 selfloop transitions, 25 changer transitions 0/124 dead transitions. [2024-06-14 12:35:27,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 1061 flow [2024-06-14 12:35:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 12:35:27,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-14 12:35:27,580 INFO L175 Difference]: Start difference. First operand has 79 places, 88 transitions, 655 flow. Second operand 6 states and 158 transitions. [2024-06-14 12:35:27,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 1061 flow [2024-06-14 12:35:27,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 1020 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:27,612 INFO L231 Difference]: Finished difference. Result has 81 places, 92 transitions, 723 flow [2024-06-14 12:35:27,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=81, PETRI_TRANSITIONS=92} [2024-06-14 12:35:27,613 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-14 12:35:27,613 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 92 transitions, 723 flow [2024-06-14 12:35:27,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:27,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:27,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:27,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:35:27,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:27,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -661270952, now seen corresponding path program 2 times [2024-06-14 12:35:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:27,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341137785] [2024-06-14 12:35:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:28,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:28,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341137785] [2024-06-14 12:35:28,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341137785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:28,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:28,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678638912] [2024-06-14 12:35:28,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:28,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:28,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:28,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 92 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:28,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:28,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:28,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:30,048 INFO L124 PetriNetUnfolderBase]: 9903/13713 cut-off events. [2024-06-14 12:35:30,048 INFO L125 PetriNetUnfolderBase]: For 63666/63666 co-relation queries the response was YES. [2024-06-14 12:35:30,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54251 conditions, 13713 events. 9903/13713 cut-off events. For 63666/63666 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73647 event pairs, 4668 based on Foata normal form. 6/13716 useless extension candidates. Maximal degree in co-relation 54219. Up to 13435 conditions per place. [2024-06-14 12:35:30,140 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 97 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-14 12:35:30,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1011 flow [2024-06-14 12:35:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:35:30,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-14 12:35:30,142 INFO L175 Difference]: Start difference. First operand has 81 places, 92 transitions, 723 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:35:30,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1011 flow [2024-06-14 12:35:30,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 968 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:30,191 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 719 flow [2024-06-14 12:35:30,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=719, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-14 12:35:30,191 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-14 12:35:30,192 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 719 flow [2024-06-14 12:35:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:30,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:30,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:30,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:35:30,192 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:30,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash 98928792, now seen corresponding path program 1 times [2024-06-14 12:35:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:30,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297216726] [2024-06-14 12:35:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:30,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:31,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:31,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297216726] [2024-06-14 12:35:31,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297216726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:31,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:31,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:31,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388032220] [2024-06-14 12:35:31,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:31,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:31,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:31,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:31,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:31,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 719 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:31,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:31,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:31,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:33,931 INFO L124 PetriNetUnfolderBase]: 12015/16593 cut-off events. [2024-06-14 12:35:33,932 INFO L125 PetriNetUnfolderBase]: For 85965/85965 co-relation queries the response was YES. [2024-06-14 12:35:33,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65161 conditions, 16593 events. 12015/16593 cut-off events. For 85965/85965 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 89301 event pairs, 5700 based on Foata normal form. 6/16596 useless extension candidates. Maximal degree in co-relation 65128. Up to 16226 conditions per place. [2024-06-14 12:35:34,030 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 106 selfloop transitions, 20 changer transitions 0/131 dead transitions. [2024-06-14 12:35:34,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1124 flow [2024-06-14 12:35:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 12:35:34,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-14 12:35:34,031 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 719 flow. Second operand 7 states and 164 transitions. [2024-06-14 12:35:34,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1124 flow [2024-06-14 12:35:34,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 1054 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:34,093 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 783 flow [2024-06-14 12:35:34,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-14 12:35:34,094 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-14 12:35:34,094 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 783 flow [2024-06-14 12:35:34,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:34,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:34,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:34,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:35:34,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:34,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1225873988, now seen corresponding path program 1 times [2024-06-14 12:35:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:34,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630604927] [2024-06-14 12:35:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:34,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:34,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630604927] [2024-06-14 12:35:34,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630604927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:34,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:34,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:35:34,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717747630] [2024-06-14 12:35:34,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:34,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:35:34,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:35:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:35:34,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:34,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 783 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:34,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:34,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:34,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:36,430 INFO L124 PetriNetUnfolderBase]: 12001/16499 cut-off events. [2024-06-14 12:35:36,431 INFO L125 PetriNetUnfolderBase]: For 101418/101418 co-relation queries the response was YES. [2024-06-14 12:35:36,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68622 conditions, 16499 events. 12001/16499 cut-off events. For 101418/101418 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 87579 event pairs, 5767 based on Foata normal form. 4/16500 useless extension candidates. Maximal degree in co-relation 68588. Up to 16265 conditions per place. [2024-06-14 12:35:36,557 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 103 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-06-14 12:35:36,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 1085 flow [2024-06-14 12:35:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:35:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:35:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 12:35:36,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-06-14 12:35:36,559 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 783 flow. Second operand 5 states and 116 transitions. [2024-06-14 12:35:36,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 1085 flow [2024-06-14 12:35:36,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 1025 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:36,631 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 798 flow [2024-06-14 12:35:36,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=798, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-14 12:35:36,631 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-14 12:35:36,632 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 798 flow [2024-06-14 12:35:36,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:36,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:36,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:36,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:35:36,632 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:36,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash 786101975, now seen corresponding path program 1 times [2024-06-14 12:35:36,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:36,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417734692] [2024-06-14 12:35:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:37,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:37,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417734692] [2024-06-14 12:35:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417734692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:37,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:35:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110629429] [2024-06-14 12:35:37,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:37,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:35:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:37,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:35:37,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:35:37,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:37,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 798 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:37,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:37,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:37,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:39,575 INFO L124 PetriNetUnfolderBase]: 11652/16052 cut-off events. [2024-06-14 12:35:39,575 INFO L125 PetriNetUnfolderBase]: For 117644/117644 co-relation queries the response was YES. [2024-06-14 12:35:39,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70276 conditions, 16052 events. 11652/16052 cut-off events. For 117644/117644 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 87368 event pairs, 5065 based on Foata normal form. 6/16051 useless extension candidates. Maximal degree in co-relation 70241. Up to 15510 conditions per place. [2024-06-14 12:35:39,703 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 111 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-14 12:35:39,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 155 transitions, 1268 flow [2024-06-14 12:35:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:35:39,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-14 12:35:39,705 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 798 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:35:39,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 155 transitions, 1268 flow [2024-06-14 12:35:39,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 155 transitions, 1223 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:39,791 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 891 flow [2024-06-14 12:35:39,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2024-06-14 12:35:39,792 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-14 12:35:39,792 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 891 flow [2024-06-14 12:35:39,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:39,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:39,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:39,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:35:39,793 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:39,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash -483480153, now seen corresponding path program 1 times [2024-06-14 12:35:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:39,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628558133] [2024-06-14 12:35:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:40,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628558133] [2024-06-14 12:35:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628558133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:40,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014188043] [2024-06-14 12:35:40,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:40,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:40,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:40,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:40,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:40,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:40,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:40,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:40,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:42,767 INFO L124 PetriNetUnfolderBase]: 12009/16496 cut-off events. [2024-06-14 12:35:42,767 INFO L125 PetriNetUnfolderBase]: For 140353/140353 co-relation queries the response was YES. [2024-06-14 12:35:42,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76137 conditions, 16496 events. 12009/16496 cut-off events. For 140353/140353 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 87636 event pairs, 5622 based on Foata normal form. 3/16496 useless extension candidates. Maximal degree in co-relation 76101. Up to 16205 conditions per place. [2024-06-14 12:35:42,886 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 113 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-06-14 12:35:42,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 143 transitions, 1295 flow [2024-06-14 12:35:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:35:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:35:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 12:35:42,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2024-06-14 12:35:42,888 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 891 flow. Second operand 7 states and 165 transitions. [2024-06-14 12:35:42,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 143 transitions, 1295 flow [2024-06-14 12:35:42,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 143 transitions, 1175 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:42,992 INFO L231 Difference]: Finished difference. Result has 93 places, 111 transitions, 889 flow [2024-06-14 12:35:42,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=93, PETRI_TRANSITIONS=111} [2024-06-14 12:35:42,993 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-14 12:35:42,993 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 111 transitions, 889 flow [2024-06-14 12:35:42,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:42,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:42,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:42,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:35:42,993 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:42,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1400701205, now seen corresponding path program 1 times [2024-06-14 12:35:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655661585] [2024-06-14 12:35:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:44,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655661585] [2024-06-14 12:35:44,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655661585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:44,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:44,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:44,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414294504] [2024-06-14 12:35:44,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:44,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:44,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:44,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:44,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:44,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:44,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 111 transitions, 889 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:44,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:44,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:44,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:46,230 INFO L124 PetriNetUnfolderBase]: 12256/17005 cut-off events. [2024-06-14 12:35:46,230 INFO L125 PetriNetUnfolderBase]: For 163747/163747 co-relation queries the response was YES. [2024-06-14 12:35:46,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79395 conditions, 17005 events. 12256/17005 cut-off events. For 163747/163747 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 93941 event pairs, 3491 based on Foata normal form. 24/17014 useless extension candidates. Maximal degree in co-relation 79358. Up to 15470 conditions per place. [2024-06-14 12:35:46,362 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 128 selfloop transitions, 43 changer transitions 0/178 dead transitions. [2024-06-14 12:35:46,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 178 transitions, 1579 flow [2024-06-14 12:35:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 12:35:46,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-14 12:35:46,366 INFO L175 Difference]: Start difference. First operand has 93 places, 111 transitions, 889 flow. Second operand 8 states and 215 transitions. [2024-06-14 12:35:46,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 178 transitions, 1579 flow [2024-06-14 12:35:46,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 178 transitions, 1508 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:46,481 INFO L231 Difference]: Finished difference. Result has 96 places, 117 transitions, 1016 flow [2024-06-14 12:35:46,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1016, PETRI_PLACES=96, PETRI_TRANSITIONS=117} [2024-06-14 12:35:46,481 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-14 12:35:46,481 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 117 transitions, 1016 flow [2024-06-14 12:35:46,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:46,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:46,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:35:46,482 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:46,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1400640755, now seen corresponding path program 2 times [2024-06-14 12:35:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:46,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814170016] [2024-06-14 12:35:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:47,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:47,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814170016] [2024-06-14 12:35:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814170016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:47,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:47,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:47,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111747315] [2024-06-14 12:35:47,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:47,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:47,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:47,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:47,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:47,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 117 transitions, 1016 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:47,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:47,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:47,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:49,821 INFO L124 PetriNetUnfolderBase]: 12464/17347 cut-off events. [2024-06-14 12:35:49,821 INFO L125 PetriNetUnfolderBase]: For 190640/190645 co-relation queries the response was YES. [2024-06-14 12:35:49,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84142 conditions, 17347 events. 12464/17347 cut-off events. For 190640/190645 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 96644 event pairs, 4608 based on Foata normal form. 34/17365 useless extension candidates. Maximal degree in co-relation 84103. Up to 16339 conditions per place. [2024-06-14 12:35:49,959 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 114 selfloop transitions, 57 changer transitions 0/178 dead transitions. [2024-06-14 12:35:49,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 178 transitions, 1664 flow [2024-06-14 12:35:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:35:49,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-14 12:35:49,960 INFO L175 Difference]: Start difference. First operand has 96 places, 117 transitions, 1016 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:35:49,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 178 transitions, 1664 flow [2024-06-14 12:35:50,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1604 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:50,121 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 1150 flow [2024-06-14 12:35:50,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1150, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-06-14 12:35:50,122 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-14 12:35:50,122 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 1150 flow [2024-06-14 12:35:50,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:50,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:50,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:50,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:35:50,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:50,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1804695357, now seen corresponding path program 3 times [2024-06-14 12:35:50,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:50,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305106680] [2024-06-14 12:35:50,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:50,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:51,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305106680] [2024-06-14 12:35:51,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305106680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:51,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:51,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41503112] [2024-06-14 12:35:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:51,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:51,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-14 12:35:51,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 1150 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:51,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:51,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-14 12:35:51,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:53,693 INFO L124 PetriNetUnfolderBase]: 12598/17526 cut-off events. [2024-06-14 12:35:53,693 INFO L125 PetriNetUnfolderBase]: For 212523/212523 co-relation queries the response was YES. [2024-06-14 12:35:53,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86831 conditions, 17526 events. 12598/17526 cut-off events. For 212523/212523 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 97681 event pairs, 4717 based on Foata normal form. 42/17561 useless extension candidates. Maximal degree in co-relation 86790. Up to 16643 conditions per place. [2024-06-14 12:35:53,838 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 131 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-14 12:35:53,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 176 transitions, 1688 flow [2024-06-14 12:35:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:35:53,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-14 12:35:53,840 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 1150 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:35:53,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 176 transitions, 1688 flow [2024-06-14 12:35:54,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 176 transitions, 1585 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:54,052 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 1191 flow [2024-06-14 12:35:54,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1191, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2024-06-14 12:35:54,052 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-14 12:35:54,052 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 1191 flow [2024-06-14 12:35:54,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:54,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:54,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:54,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:35:54,053 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:54,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash 168777911, now seen corresponding path program 1 times [2024-06-14 12:35:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:54,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489343005] [2024-06-14 12:35:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:54,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:54,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489343005] [2024-06-14 12:35:54,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489343005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:54,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:54,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:35:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442378406] [2024-06-14 12:35:54,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:54,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:35:54,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:54,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:35:54,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:35:54,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:54,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:54,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:54,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:54,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:56,907 INFO L124 PetriNetUnfolderBase]: 12974/17983 cut-off events. [2024-06-14 12:35:56,908 INFO L125 PetriNetUnfolderBase]: For 231407/231407 co-relation queries the response was YES. [2024-06-14 12:35:56,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90852 conditions, 17983 events. 12974/17983 cut-off events. For 231407/231407 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 97825 event pairs, 5545 based on Foata normal form. 4/17983 useless extension candidates. Maximal degree in co-relation 90810. Up to 17641 conditions per place. [2024-06-14 12:35:57,069 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 140 selfloop transitions, 21 changer transitions 0/166 dead transitions. [2024-06-14 12:35:57,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 166 transitions, 1753 flow [2024-06-14 12:35:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 12:35:57,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-14 12:35:57,070 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 1191 flow. Second operand 6 states and 146 transitions. [2024-06-14 12:35:57,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 166 transitions, 1753 flow [2024-06-14 12:35:57,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 166 transitions, 1640 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:57,280 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1259 flow [2024-06-14 12:35:57,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1259, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-14 12:35:57,280 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-14 12:35:57,280 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1259 flow [2024-06-14 12:35:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:57,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:57,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:57,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:35:57,281 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash 344870105, now seen corresponding path program 1 times [2024-06-14 12:35:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285944275] [2024-06-14 12:35:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:58,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285944275] [2024-06-14 12:35:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285944275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:58,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128116083] [2024-06-14 12:35:58,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:58,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:58,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:58,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:58,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:58,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:35:58,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1259 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:58,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:58,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:35:58,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:00,939 INFO L124 PetriNetUnfolderBase]: 13010/18038 cut-off events. [2024-06-14 12:36:00,939 INFO L125 PetriNetUnfolderBase]: For 258447/258447 co-relation queries the response was YES. [2024-06-14 12:36:00,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94882 conditions, 18038 events. 13010/18038 cut-off events. For 258447/258447 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 98241 event pairs, 5556 based on Foata normal form. 6/18041 useless extension candidates. Maximal degree in co-relation 94838. Up to 17630 conditions per place. [2024-06-14 12:36:01,072 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 153 selfloop transitions, 28 changer transitions 0/186 dead transitions. [2024-06-14 12:36:01,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 1825 flow [2024-06-14 12:36:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 12:36:01,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543269230769231 [2024-06-14 12:36:01,074 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1259 flow. Second operand 8 states and 189 transitions. [2024-06-14 12:36:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 1825 flow [2024-06-14 12:36:01,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 186 transitions, 1785 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-14 12:36:01,297 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1399 flow [2024-06-14 12:36:01,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1399, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2024-06-14 12:36:01,298 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-14 12:36:01,298 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1399 flow [2024-06-14 12:36:01,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:01,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:01,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:01,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:36:01,299 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:01,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 581045465, now seen corresponding path program 2 times [2024-06-14 12:36:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:01,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743753948] [2024-06-14 12:36:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:02,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:02,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743753948] [2024-06-14 12:36:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743753948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:02,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:02,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:02,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953597582] [2024-06-14 12:36:02,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:02,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:02,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1399 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:02,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:02,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:02,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:04,920 INFO L124 PetriNetUnfolderBase]: 13031/18069 cut-off events. [2024-06-14 12:36:04,920 INFO L125 PetriNetUnfolderBase]: For 286102/286102 co-relation queries the response was YES. [2024-06-14 12:36:04,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97835 conditions, 18069 events. 13031/18069 cut-off events. For 286102/286102 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 98271 event pairs, 5547 based on Foata normal form. 12/18078 useless extension candidates. Maximal degree in co-relation 97787. Up to 17646 conditions per place. [2024-06-14 12:36:05,069 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 155 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-06-14 12:36:05,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 190 transitions, 1977 flow [2024-06-14 12:36:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 12:36:05,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495192307692308 [2024-06-14 12:36:05,070 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1399 flow. Second operand 8 states and 187 transitions. [2024-06-14 12:36:05,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 190 transitions, 1977 flow [2024-06-14 12:36:05,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 190 transitions, 1871 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:05,320 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1480 flow [2024-06-14 12:36:05,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1480, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-14 12:36:05,321 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-14 12:36:05,321 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1480 flow [2024-06-14 12:36:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:05,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:05,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:05,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:36:05,322 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:05,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1447283677, now seen corresponding path program 1 times [2024-06-14 12:36:05,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:05,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900332535] [2024-06-14 12:36:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:05,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900332535] [2024-06-14 12:36:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900332535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:06,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:06,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:06,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14933541] [2024-06-14 12:36:06,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:06,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:06,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:06,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:06,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1480 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:06,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:06,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:06,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:08,704 INFO L124 PetriNetUnfolderBase]: 12986/17998 cut-off events. [2024-06-14 12:36:08,704 INFO L125 PetriNetUnfolderBase]: For 315083/315091 co-relation queries the response was YES. [2024-06-14 12:36:08,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100313 conditions, 17998 events. 12986/17998 cut-off events. For 315083/315091 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97853 event pairs, 5046 based on Foata normal form. 7/18001 useless extension candidates. Maximal degree in co-relation 100264. Up to 17338 conditions per place. [2024-06-14 12:36:08,844 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 132 selfloop transitions, 47 changer transitions 0/184 dead transitions. [2024-06-14 12:36:08,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 184 transitions, 1936 flow [2024-06-14 12:36:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 12:36:08,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-14 12:36:08,846 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1480 flow. Second operand 6 states and 157 transitions. [2024-06-14 12:36:08,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 184 transitions, 1936 flow [2024-06-14 12:36:09,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 184 transitions, 1785 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:09,214 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1444 flow [2024-06-14 12:36:09,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-14 12:36:09,215 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-14 12:36:09,215 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1444 flow [2024-06-14 12:36:09,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:09,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:09,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:09,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:36:09,216 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:09,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2102684203, now seen corresponding path program 3 times [2024-06-14 12:36:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558030542] [2024-06-14 12:36:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:10,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:10,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558030542] [2024-06-14 12:36:10,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558030542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:10,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:10,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:10,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732847533] [2024-06-14 12:36:10,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:10,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:10,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:10,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:10,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:10,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:10,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:10,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:12,802 INFO L124 PetriNetUnfolderBase]: 12971/17973 cut-off events. [2024-06-14 12:36:12,802 INFO L125 PetriNetUnfolderBase]: For 336856/336856 co-relation queries the response was YES. [2024-06-14 12:36:12,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101180 conditions, 17973 events. 12971/17973 cut-off events. For 336856/336856 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97534 event pairs, 5391 based on Foata normal form. 6/17976 useless extension candidates. Maximal degree in co-relation 101130. Up to 17587 conditions per place. [2024-06-14 12:36:12,946 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 165 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-06-14 12:36:12,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 1980 flow [2024-06-14 12:36:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 12:36:12,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2024-06-14 12:36:12,948 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1444 flow. Second operand 8 states and 186 transitions. [2024-06-14 12:36:12,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 1980 flow [2024-06-14 12:36:13,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 193 transitions, 1886 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:13,331 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1470 flow [2024-06-14 12:36:13,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1470, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2024-06-14 12:36:13,331 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-14 12:36:13,332 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1470 flow [2024-06-14 12:36:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:13,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:13,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:13,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:36:13,332 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:13,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1243823269, now seen corresponding path program 2 times [2024-06-14 12:36:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:13,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77870771] [2024-06-14 12:36:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77870771] [2024-06-14 12:36:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77870771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:14,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:14,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:14,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892604284] [2024-06-14 12:36:14,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:14,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:14,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1470 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:14,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:14,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:14,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:16,434 INFO L124 PetriNetUnfolderBase]: 12957/17955 cut-off events. [2024-06-14 12:36:16,435 INFO L125 PetriNetUnfolderBase]: For 369808/369808 co-relation queries the response was YES. [2024-06-14 12:36:16,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103645 conditions, 17955 events. 12957/17955 cut-off events. For 369808/369808 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97499 event pairs, 5544 based on Foata normal form. 4/17956 useless extension candidates. Maximal degree in co-relation 103594. Up to 17655 conditions per place. [2024-06-14 12:36:16,801 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 153 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2024-06-14 12:36:16,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 172 transitions, 1854 flow [2024-06-14 12:36:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 12:36:16,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-14 12:36:16,802 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1470 flow. Second operand 6 states and 135 transitions. [2024-06-14 12:36:16,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 172 transitions, 1854 flow [2024-06-14 12:36:17,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 172 transitions, 1736 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:17,129 INFO L231 Difference]: Finished difference. Result has 118 places, 153 transitions, 1389 flow [2024-06-14 12:36:17,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1389, PETRI_PLACES=118, PETRI_TRANSITIONS=153} [2024-06-14 12:36:17,129 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-14 12:36:17,129 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 153 transitions, 1389 flow [2024-06-14 12:36:17,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:17,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:17,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:17,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:36:17,130 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:17,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1249531237, now seen corresponding path program 1 times [2024-06-14 12:36:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:17,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071789920] [2024-06-14 12:36:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:17,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:17,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:17,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071789920] [2024-06-14 12:36:17,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071789920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:17,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:17,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:17,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896335354] [2024-06-14 12:36:17,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:17,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:17,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:17,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 153 transitions, 1389 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:17,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:17,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:17,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:20,440 INFO L124 PetriNetUnfolderBase]: 12989/17995 cut-off events. [2024-06-14 12:36:20,440 INFO L125 PetriNetUnfolderBase]: For 395365/395365 co-relation queries the response was YES. [2024-06-14 12:36:20,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104734 conditions, 17995 events. 12989/17995 cut-off events. For 395365/395365 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97812 event pairs, 5540 based on Foata normal form. 4/17995 useless extension candidates. Maximal degree in co-relation 104682. Up to 17644 conditions per place. [2024-06-14 12:36:20,612 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 157 selfloop transitions, 24 changer transitions 0/186 dead transitions. [2024-06-14 12:36:20,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 186 transitions, 2005 flow [2024-06-14 12:36:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 12:36:20,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-14 12:36:20,613 INFO L175 Difference]: Start difference. First operand has 118 places, 153 transitions, 1389 flow. Second operand 6 states and 144 transitions. [2024-06-14 12:36:20,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 186 transitions, 2005 flow [2024-06-14 12:36:20,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 1955 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:21,000 INFO L231 Difference]: Finished difference. Result has 119 places, 161 transitions, 1504 flow [2024-06-14 12:36:21,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1504, PETRI_PLACES=119, PETRI_TRANSITIONS=161} [2024-06-14 12:36:21,001 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-14 12:36:21,001 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 161 transitions, 1504 flow [2024-06-14 12:36:21,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:21,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:21,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:21,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:36:21,002 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:21,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash 215643773, now seen corresponding path program 2 times [2024-06-14 12:36:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:21,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368684696] [2024-06-14 12:36:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:21,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:21,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368684696] [2024-06-14 12:36:21,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368684696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:21,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:21,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:36:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729062774] [2024-06-14 12:36:21,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:21,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:36:21,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:36:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:36:21,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:21,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 161 transitions, 1504 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:21,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:21,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:21,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:24,381 INFO L124 PetriNetUnfolderBase]: 12975/17981 cut-off events. [2024-06-14 12:36:24,381 INFO L125 PetriNetUnfolderBase]: For 430919/430924 co-relation queries the response was YES. [2024-06-14 12:36:24,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108327 conditions, 17981 events. 12975/17981 cut-off events. For 430919/430924 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 97699 event pairs, 5537 based on Foata normal form. 8/17985 useless extension candidates. Maximal degree in co-relation 108275. Up to 17632 conditions per place. [2024-06-14 12:36:24,520 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 152 selfloop transitions, 24 changer transitions 0/181 dead transitions. [2024-06-14 12:36:24,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 181 transitions, 1910 flow [2024-06-14 12:36:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:36:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:36:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 12:36:24,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-14 12:36:24,521 INFO L175 Difference]: Start difference. First operand has 119 places, 161 transitions, 1504 flow. Second operand 6 states and 138 transitions. [2024-06-14 12:36:24,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 181 transitions, 1910 flow [2024-06-14 12:36:24,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1823 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:24,897 INFO L231 Difference]: Finished difference. Result has 123 places, 161 transitions, 1475 flow [2024-06-14 12:36:24,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1475, PETRI_PLACES=123, PETRI_TRANSITIONS=161} [2024-06-14 12:36:24,897 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-14 12:36:24,897 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 161 transitions, 1475 flow [2024-06-14 12:36:24,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:24,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:24,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:36:24,898 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:24,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash -258375931, now seen corresponding path program 1 times [2024-06-14 12:36:24,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:24,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034843882] [2024-06-14 12:36:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:24,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034843882] [2024-06-14 12:36:25,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034843882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:25,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:25,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:25,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903108669] [2024-06-14 12:36:25,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:25,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:25,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:25,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:25,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:25,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 161 transitions, 1475 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:25,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:25,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:25,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:28,370 INFO L124 PetriNetUnfolderBase]: 13154/18194 cut-off events. [2024-06-14 12:36:28,370 INFO L125 PetriNetUnfolderBase]: For 462410/462415 co-relation queries the response was YES. [2024-06-14 12:36:28,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110241 conditions, 18194 events. 13154/18194 cut-off events. For 462410/462415 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 98533 event pairs, 5098 based on Foata normal form. 12/18200 useless extension candidates. Maximal degree in co-relation 110187. Up to 17537 conditions per place. [2024-06-14 12:36:28,546 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 176 selfloop transitions, 50 changer transitions 0/231 dead transitions. [2024-06-14 12:36:28,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 231 transitions, 2548 flow [2024-06-14 12:36:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:36:28,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-14 12:36:28,548 INFO L175 Difference]: Start difference. First operand has 123 places, 161 transitions, 1475 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:36:28,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 231 transitions, 2548 flow [2024-06-14 12:36:29,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 231 transitions, 2454 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:29,055 INFO L231 Difference]: Finished difference. Result has 127 places, 189 transitions, 1899 flow [2024-06-14 12:36:29,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1899, PETRI_PLACES=127, PETRI_TRANSITIONS=189} [2024-06-14 12:36:29,056 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-14 12:36:29,056 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 189 transitions, 1899 flow [2024-06-14 12:36:29,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:29,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:29,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:29,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:36:29,056 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:29,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:29,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1104283919, now seen corresponding path program 1 times [2024-06-14 12:36:29,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:29,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118088993] [2024-06-14 12:36:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:30,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118088993] [2024-06-14 12:36:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118088993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:30,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:30,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:30,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967686318] [2024-06-14 12:36:30,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:30,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:30,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:30,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:30,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 189 transitions, 1899 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:30,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:30,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:30,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:33,351 INFO L124 PetriNetUnfolderBase]: 13234/18333 cut-off events. [2024-06-14 12:36:33,352 INFO L125 PetriNetUnfolderBase]: For 512315/512320 co-relation queries the response was YES. [2024-06-14 12:36:33,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117574 conditions, 18333 events. 13234/18333 cut-off events. For 512315/512320 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 99628 event pairs, 5036 based on Foata normal form. 8/18337 useless extension candidates. Maximal degree in co-relation 117517. Up to 17662 conditions per place. [2024-06-14 12:36:33,518 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 191 selfloop transitions, 50 changer transitions 0/246 dead transitions. [2024-06-14 12:36:33,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 246 transitions, 2640 flow [2024-06-14 12:36:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 12:36:33,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-14 12:36:33,519 INFO L175 Difference]: Start difference. First operand has 127 places, 189 transitions, 1899 flow. Second operand 8 states and 201 transitions. [2024-06-14 12:36:33,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 246 transitions, 2640 flow [2024-06-14 12:36:33,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 246 transitions, 2556 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-14 12:36:33,975 INFO L231 Difference]: Finished difference. Result has 135 places, 197 transitions, 2072 flow [2024-06-14 12:36:33,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2072, PETRI_PLACES=135, PETRI_TRANSITIONS=197} [2024-06-14 12:36:33,975 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-14 12:36:33,975 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 197 transitions, 2072 flow [2024-06-14 12:36:33,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:33,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:33,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:33,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:36:33,976 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:33,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash -604239875, now seen corresponding path program 2 times [2024-06-14 12:36:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:33,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146950384] [2024-06-14 12:36:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:35,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146950384] [2024-06-14 12:36:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146950384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:35,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451126729] [2024-06-14 12:36:35,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:35,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:35,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:35,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:35,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 197 transitions, 2072 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:35,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:35,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:35,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:38,402 INFO L124 PetriNetUnfolderBase]: 13314/18445 cut-off events. [2024-06-14 12:36:38,402 INFO L125 PetriNetUnfolderBase]: For 547749/547754 co-relation queries the response was YES. [2024-06-14 12:36:38,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120503 conditions, 18445 events. 13314/18445 cut-off events. For 547749/547754 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 100191 event pairs, 5060 based on Foata normal form. 8/18449 useless extension candidates. Maximal degree in co-relation 120442. Up to 17752 conditions per place. [2024-06-14 12:36:38,565 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 194 selfloop transitions, 52 changer transitions 0/251 dead transitions. [2024-06-14 12:36:38,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 251 transitions, 2833 flow [2024-06-14 12:36:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 12:36:38,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-14 12:36:38,566 INFO L175 Difference]: Start difference. First operand has 135 places, 197 transitions, 2072 flow. Second operand 8 states and 197 transitions. [2024-06-14 12:36:38,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 251 transitions, 2833 flow [2024-06-14 12:36:39,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 251 transitions, 2671 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:39,393 INFO L231 Difference]: Finished difference. Result has 139 places, 206 transitions, 2204 flow [2024-06-14 12:36:39,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2204, PETRI_PLACES=139, PETRI_TRANSITIONS=206} [2024-06-14 12:36:39,393 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-14 12:36:39,393 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 206 transitions, 2204 flow [2024-06-14 12:36:39,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:39,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:39,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:39,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:36:39,394 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:39,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash -604232435, now seen corresponding path program 3 times [2024-06-14 12:36:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:39,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485819185] [2024-06-14 12:36:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:40,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:40,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485819185] [2024-06-14 12:36:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485819185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:40,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076714227] [2024-06-14 12:36:40,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:40,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:40,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:40,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:40,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 206 transitions, 2204 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:40,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:40,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:40,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:43,776 INFO L124 PetriNetUnfolderBase]: 13350/18487 cut-off events. [2024-06-14 12:36:43,777 INFO L125 PetriNetUnfolderBase]: For 584866/584871 co-relation queries the response was YES. [2024-06-14 12:36:43,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122853 conditions, 18487 events. 13350/18487 cut-off events. For 584866/584871 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 100363 event pairs, 5038 based on Foata normal form. 8/18491 useless extension candidates. Maximal degree in co-relation 122790. Up to 17630 conditions per place. [2024-06-14 12:36:43,937 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 189 selfloop transitions, 63 changer transitions 0/257 dead transitions. [2024-06-14 12:36:43,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 257 transitions, 2944 flow [2024-06-14 12:36:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 12:36:43,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-14 12:36:43,938 INFO L175 Difference]: Start difference. First operand has 139 places, 206 transitions, 2204 flow. Second operand 8 states and 197 transitions. [2024-06-14 12:36:43,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 257 transitions, 2944 flow [2024-06-14 12:36:44,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 257 transitions, 2819 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 12:36:44,545 INFO L231 Difference]: Finished difference. Result has 145 places, 212 transitions, 2361 flow [2024-06-14 12:36:44,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2361, PETRI_PLACES=145, PETRI_TRANSITIONS=212} [2024-06-14 12:36:44,545 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-14 12:36:44,545 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 212 transitions, 2361 flow [2024-06-14 12:36:44,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:44,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:44,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:36:44,546 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:44,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash -258077401, now seen corresponding path program 2 times [2024-06-14 12:36:44,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:44,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935255831] [2024-06-14 12:36:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:45,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:45,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935255831] [2024-06-14 12:36:45,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935255831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:45,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:45,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:36:45,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163254062] [2024-06-14 12:36:45,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:36:45,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:36:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:36:45,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:45,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 212 transitions, 2361 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:45,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:45,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:45,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:48,523 INFO L124 PetriNetUnfolderBase]: 13516/18708 cut-off events. [2024-06-14 12:36:48,523 INFO L125 PetriNetUnfolderBase]: For 625973/625978 co-relation queries the response was YES. [2024-06-14 12:36:48,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126613 conditions, 18708 events. 13516/18708 cut-off events. For 625973/625978 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 101559 event pairs, 5235 based on Foata normal form. 12/18714 useless extension candidates. Maximal degree in co-relation 126548. Up to 17941 conditions per place. [2024-06-14 12:36:48,712 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 195 selfloop transitions, 57 changer transitions 0/257 dead transitions. [2024-06-14 12:36:48,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 257 transitions, 3329 flow [2024-06-14 12:36:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:36:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:36:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 12:36:48,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-14 12:36:48,713 INFO L175 Difference]: Start difference. First operand has 145 places, 212 transitions, 2361 flow. Second operand 7 states and 174 transitions. [2024-06-14 12:36:48,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 257 transitions, 3329 flow [2024-06-14 12:36:49,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 257 transitions, 3189 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:49,491 INFO L231 Difference]: Finished difference. Result has 149 places, 222 transitions, 2509 flow [2024-06-14 12:36:49,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2509, PETRI_PLACES=149, PETRI_TRANSITIONS=222} [2024-06-14 12:36:49,491 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-14 12:36:49,492 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 222 transitions, 2509 flow [2024-06-14 12:36:49,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:49,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:49,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:49,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:36:49,492 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:36:49,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:49,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1024403839, now seen corresponding path program 4 times [2024-06-14 12:36:49,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:49,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55691591] [2024-06-14 12:36:49,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:49,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55691591] [2024-06-14 12:36:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55691591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:50,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287650982] [2024-06-14 12:36:50,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:50,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:50,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:50,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:50,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:50,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-14 12:36:50,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 222 transitions, 2509 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:50,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:50,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-14 12:36:50,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand