./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.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/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:55:46,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:55:46,211 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:55:46,218 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:55:46,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:55:46,249 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:55:46,253 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:55:46,253 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:55:46,254 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:55:46,257 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:55:46,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:55:46,258 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:55:46,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:55:46,260 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:55:46,260 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:55:46,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:55:46,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:55:46,261 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:55:46,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:55:46,261 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:55:46,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:55:46,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:55:46,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:55:46,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:55:46,263 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:55:46,264 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:55:46,264 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:55:46,264 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:55:46,265 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:55:46,265 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:55:46,266 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:55:46,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:55:46,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:55:46,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:55:46,267 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:55:46,267 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:55:46,267 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:55:46,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:55:46,267 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:55:46,268 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:55:46,268 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:55:46,268 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:55:46,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:55:46,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:55:46,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:55:46,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:55:46,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:55:46,593 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:55:46,594 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:55:46,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-14 12:55:46,823 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:55:46,824 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:55:46,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 12:55:47,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:55:48,206 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:55:48,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 12:55:48,225 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a64d0bcad/23ef77b398764e189d4b13b8bcfd9f54/FLAGd5a4b2e92 [2024-06-14 12:55:48,239 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a64d0bcad/23ef77b398764e189d4b13b8bcfd9f54 [2024-06-14 12:55:48,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:55:48,241 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:55:48,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:55:48,242 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:55:48,247 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:55:48,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:55:46" (1/2) ... [2024-06-14 12:55:48,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4840dfb6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:55:48, skipping insertion in model container [2024-06-14 12:55:48,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:55:46" (1/2) ... [2024-06-14 12:55:48,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36efeb65 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:55:48, skipping insertion in model container [2024-06-14 12:55:48,250 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:55:48" (2/2) ... [2024-06-14 12:55:48,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4840dfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:48, skipping insertion in model container [2024-06-14 12:55:48,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:55:48" (2/2) ... [2024-06-14 12:55:48,251 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:55:48,352 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:55:48,354 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-14 12:55:48,354 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-14 12:55:48,354 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) [2024-06-14 12:55:48,354 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:55:48,355 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-14 12:55:48,402 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:55:48,875 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:55:48,893 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:55:49,043 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:55:49,082 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:55:49,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49 WrapperNode [2024-06-14 12:55:49,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:55:49,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:55:49,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:55:49,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:55:49,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,108 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,149 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-14 12:55:49,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:55:49,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:55:49,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:55:49,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:55:49,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,167 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,194 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 12:55:49,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,195 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,206 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:55:49,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:55:49,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:55:49,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:55:49,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (1/1) ... [2024-06-14 12:55:49,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:55:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:55:49,254 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 12:55:49,264 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 12:55:49,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:55:49,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:55:49,296 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:55:49,296 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:55:49,296 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:55:49,297 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:55:49,297 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:55:49,297 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:55:49,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:55:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:55:49,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:55:49,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:55:49,300 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 12:55:49,461 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:55:49,464 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:55:49,882 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:55:49,882 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:55:50,174 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:55:50,174 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:55:50,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:55:50 BoogieIcfgContainer [2024-06-14 12:55:50,177 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:55:50,180 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:55:50,180 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:55:50,183 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:55:50,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:55:46" (1/4) ... [2024-06-14 12:55:50,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a23cb0c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:55:50, skipping insertion in model container [2024-06-14 12:55:50,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:55:48" (2/4) ... [2024-06-14 12:55:50,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a23cb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:55:50, skipping insertion in model container [2024-06-14 12:55:50,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:55:49" (3/4) ... [2024-06-14 12:55:50,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a23cb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:55:50, skipping insertion in model container [2024-06-14 12:55:50,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:55:50" (4/4) ... [2024-06-14 12:55:50,186 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-14 12:55:50,203 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:55:50,203 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:55:50,203 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:55:50,256 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:55:50,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:55:50,325 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:55:50,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:55:50,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:55:50,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:55:50,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:55:50,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:55:50,351 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;@4eb6a6b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:55:50,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:55:50,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:55:50,358 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:55:50,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:55:50,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:50,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:55:50,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:50,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 813129144, now seen corresponding path program 1 times [2024-06-14 12:55:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:50,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626967802] [2024-06-14 12:55:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:51,706 INFO 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 12:55:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626967802] [2024-06-14 12:55:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626967802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:51,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:51,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:55:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263920065] [2024-06-14 12:55:51,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:51,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:55:51,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:55:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:55:51,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:51,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:51,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:51,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:51,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:52,324 INFO L124 PetriNetUnfolderBase]: 1354/2039 cut-off events. [2024-06-14 12:55:52,325 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-14 12:55:52,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4153 conditions, 2039 events. 1354/2039 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9585 event pairs, 715 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 4138. Up to 2016 conditions per place. [2024-06-14 12:55:52,343 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 37 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 12:55:52,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 187 flow [2024-06-14 12:55:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:55:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:55:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 12:55:52,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 12:55:52,357 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 71 transitions. [2024-06-14 12:55:52,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 187 flow [2024-06-14 12:55:52,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:55:52,362 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:55:52,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 12:55:52,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:55:52,368 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:55:52,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:52,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:52,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:52,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:55:52,369 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:52,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash -266915881, now seen corresponding path program 1 times [2024-06-14 12:55:52,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:52,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268848058] [2024-06-14 12:55:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:52,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:53,271 INFO 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 12:55:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268848058] [2024-06-14 12:55:53,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268848058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:53,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:53,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:55:53,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800691879] [2024-06-14 12:55:53,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:55:53,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:55:53,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:55:53,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:55:53,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 12:55:53,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:53,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:55:53,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:53,723 INFO L124 PetriNetUnfolderBase]: 1363/2051 cut-off events. [2024-06-14 12:55:53,723 INFO L125 PetriNetUnfolderBase]: For 313/316 co-relation queries the response was YES. [2024-06-14 12:55:53,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4741 conditions, 2051 events. 1363/2051 cut-off events. For 313/316 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9357 event pairs, 772 based on Foata normal form. 8/2057 useless extension candidates. Maximal degree in co-relation 4726. Up to 2013 conditions per place. [2024-06-14 12:55:53,738 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 12:55:53,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 272 flow [2024-06-14 12:55:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:55:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:55:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-14 12:55:53,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 12:55:53,741 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-14 12:55:53,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 272 flow [2024-06-14 12:55:53,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:55:53,743 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 156 flow [2024-06-14 12:55:53,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 12:55:53,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 12:55:53,744 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 156 flow [2024-06-14 12:55:53,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 12:55:53,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:53,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:53,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:55:53,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:53,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:53,746 INFO L85 PathProgramCache]: Analyzing trace with hash 315543111, now seen corresponding path program 1 times [2024-06-14 12:55:53,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:53,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265427454] [2024-06-14 12:55:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:53,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:54,850 INFO 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 12:55:54,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265427454] [2024-06-14 12:55:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265427454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:54,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:54,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:55:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653476146] [2024-06-14 12:55:54,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:54,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:55:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:55:54,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:55:54,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:55:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 12:55:54,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:54,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:55:54,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:55,413 INFO L124 PetriNetUnfolderBase]: 1664/2485 cut-off events. [2024-06-14 12:55:55,413 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-06-14 12:55:55,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6479 conditions, 2485 events. 1664/2485 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11409 event pairs, 791 based on Foata normal form. 6/2490 useless extension candidates. Maximal degree in co-relation 6461. Up to 2418 conditions per place. [2024-06-14 12:55:55,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 64 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-14 12:55:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 413 flow [2024-06-14 12:55:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:55:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:55:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-14 12:55:55,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 12:55:55,466 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 156 flow. Second operand 5 states and 108 transitions. [2024-06-14 12:55:55,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 413 flow [2024-06-14 12:55:55,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 398 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 12:55:55,470 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 232 flow [2024-06-14 12:55:55,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-06-14 12:55:55,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-14 12:55:55,471 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 232 flow [2024-06-14 12:55:55,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 12:55:55,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:55,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:55,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:55:55,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:55,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1275019600, now seen corresponding path program 1 times [2024-06-14 12:55:55,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:55,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343781331] [2024-06-14 12:55:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:55,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:56,642 INFO 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 12:55:56,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:56,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343781331] [2024-06-14 12:55:56,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343781331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:56,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:56,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:55:56,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475544532] [2024-06-14 12:55:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:55:56,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:56,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:55:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:55:56,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:55:56,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:56,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:56,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:55:56,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:57,297 INFO L124 PetriNetUnfolderBase]: 1658/2476 cut-off events. [2024-06-14 12:55:57,298 INFO L125 PetriNetUnfolderBase]: For 2199/2199 co-relation queries the response was YES. [2024-06-14 12:55:57,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7121 conditions, 2476 events. 1658/2476 cut-off events. For 2199/2199 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11153 event pairs, 722 based on Foata normal form. 3/2478 useless extension candidates. Maximal degree in co-relation 7099. Up to 2418 conditions per place. [2024-06-14 12:55:57,315 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-14 12:55:57,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 513 flow [2024-06-14 12:55:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:55:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:55:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 12:55:57,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-14 12:55:57,317 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 232 flow. Second operand 6 states and 120 transitions. [2024-06-14 12:55:57,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 513 flow [2024-06-14 12:55:57,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 509 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 12:55:57,324 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 327 flow [2024-06-14 12:55:57,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-14 12:55:57,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 12:55:57,325 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 327 flow [2024-06-14 12:55:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:57,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:57,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:57,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:55:57,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:57,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash 870902828, now seen corresponding path program 1 times [2024-06-14 12:55:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:57,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136285956] [2024-06-14 12:55:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:57,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:58,668 INFO 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 12:55:58,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:58,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136285956] [2024-06-14 12:55:58,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136285956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:58,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:58,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:55:58,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524114375] [2024-06-14 12:55:58,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:58,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:55:58,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:58,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:55:58,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:55:58,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:55:58,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:58,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:58,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:55:58,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:59,469 INFO L124 PetriNetUnfolderBase]: 1716/2562 cut-off events. [2024-06-14 12:55:59,469 INFO L125 PetriNetUnfolderBase]: For 3748/3748 co-relation queries the response was YES. [2024-06-14 12:55:59,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8041 conditions, 2562 events. 1716/2562 cut-off events. For 3748/3748 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11630 event pairs, 566 based on Foata normal form. 23/2584 useless extension candidates. Maximal degree in co-relation 8014. Up to 2381 conditions per place. [2024-06-14 12:55:59,489 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 24 changer transitions 0/108 dead transitions. [2024-06-14 12:55:59,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 108 transitions, 675 flow [2024-06-14 12:55:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:55:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:55:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 12:55:59,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 12:55:59,493 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 327 flow. Second operand 7 states and 150 transitions. [2024-06-14 12:55:59,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 108 transitions, 675 flow [2024-06-14 12:55:59,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 108 transitions, 663 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 12:55:59,504 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 421 flow [2024-06-14 12:55:59,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-14 12:55:59,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-14 12:55:59,507 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 421 flow [2024-06-14 12:55:59,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:55:59,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:59,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:55:59,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:55:59,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:55:59,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:59,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1076944120, now seen corresponding path program 1 times [2024-06-14 12:55:59,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:59,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820964965] [2024-06-14 12:55:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:59,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:00,346 INFO 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 12:56:00,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:00,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820964965] [2024-06-14 12:56:00,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820964965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:00,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:00,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020450925] [2024-06-14 12:56:00,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:00,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:00,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:00,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:00,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:00,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 421 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:00,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:00,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:00,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:01,026 INFO L124 PetriNetUnfolderBase]: 1706/2549 cut-off events. [2024-06-14 12:56:01,026 INFO L125 PetriNetUnfolderBase]: For 6002/6005 co-relation queries the response was YES. [2024-06-14 12:56:01,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9261 conditions, 2549 events. 1706/2549 cut-off events. For 6002/6005 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11570 event pairs, 667 based on Foata normal form. 6/2553 useless extension candidates. Maximal degree in co-relation 9231. Up to 2508 conditions per place. [2024-06-14 12:56:01,053 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-14 12:56:01,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 619 flow [2024-06-14 12:56:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:56:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:56:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-14 12:56:01,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-14 12:56:01,055 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 421 flow. Second operand 5 states and 84 transitions. [2024-06-14 12:56:01,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 619 flow [2024-06-14 12:56:01,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 575 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:01,065 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 425 flow [2024-06-14 12:56:01,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-14 12:56:01,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 12:56:01,068 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 425 flow [2024-06-14 12:56:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:01,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:01,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:01,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:56:01,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:01,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -33630803, now seen corresponding path program 1 times [2024-06-14 12:56:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:01,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939458206] [2024-06-14 12:56:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:02,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939458206] [2024-06-14 12:56:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939458206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:02,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:02,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:02,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125211041] [2024-06-14 12:56:02,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:02,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:02,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:02,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:02,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 425 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:02,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:02,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:02,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:02,967 INFO L124 PetriNetUnfolderBase]: 1756/2619 cut-off events. [2024-06-14 12:56:02,967 INFO L125 PetriNetUnfolderBase]: For 7379/7385 co-relation queries the response was YES. [2024-06-14 12:56:02,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9887 conditions, 2619 events. 1756/2619 cut-off events. For 7379/7385 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12007 event pairs, 642 based on Foata normal form. 9/2626 useless extension candidates. Maximal degree in co-relation 9855. Up to 2457 conditions per place. [2024-06-14 12:56:02,991 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 83 selfloop transitions, 24 changer transitions 0/110 dead transitions. [2024-06-14 12:56:02,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 827 flow [2024-06-14 12:56:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:56:02,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-14 12:56:02,994 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 425 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:56:02,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 827 flow [2024-06-14 12:56:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 803 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:03,002 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 504 flow [2024-06-14 12:56:03,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-14 12:56:03,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 12:56:03,004 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 504 flow [2024-06-14 12:56:03,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:03,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:03,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:56:03,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:03,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash 294640599, now seen corresponding path program 1 times [2024-06-14 12:56:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:03,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615104472] [2024-06-14 12:56:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:04,037 INFO 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 12:56:04,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:04,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615104472] [2024-06-14 12:56:04,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615104472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:04,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:04,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:04,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077264367] [2024-06-14 12:56:04,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:04,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:04,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:04,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:04,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:04,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:04,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 504 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:04,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:04,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:04,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:04,669 INFO L124 PetriNetUnfolderBase]: 1789/2668 cut-off events. [2024-06-14 12:56:04,669 INFO L125 PetriNetUnfolderBase]: For 9613/9613 co-relation queries the response was YES. [2024-06-14 12:56:04,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10728 conditions, 2668 events. 1789/2668 cut-off events. For 9613/9613 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12188 event pairs, 630 based on Foata normal form. 4/2668 useless extension candidates. Maximal degree in co-relation 10695. Up to 2541 conditions per place. [2024-06-14 12:56:04,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-14 12:56:04,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 892 flow [2024-06-14 12:56:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:56:04,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 12:56:04,696 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 504 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:56:04,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 892 flow [2024-06-14 12:56:04,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 860 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:04,712 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 607 flow [2024-06-14 12:56:04,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-14 12:56:04,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-14 12:56:04,715 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 607 flow [2024-06-14 12:56:04,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:04,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:04,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:04,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:56:04,716 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:04,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash 294640413, now seen corresponding path program 2 times [2024-06-14 12:56:04,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:04,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033918743] [2024-06-14 12:56:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:04,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:05,817 INFO 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 12:56:05,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:05,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033918743] [2024-06-14 12:56:05,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033918743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:05,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:05,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:05,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88032490] [2024-06-14 12:56:05,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:05,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:05,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:05,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:05,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 607 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:05,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:05,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:05,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:06,512 INFO L124 PetriNetUnfolderBase]: 1830/2725 cut-off events. [2024-06-14 12:56:06,512 INFO L125 PetriNetUnfolderBase]: For 12119/12122 co-relation queries the response was YES. [2024-06-14 12:56:06,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11616 conditions, 2725 events. 1830/2725 cut-off events. For 12119/12122 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12453 event pairs, 654 based on Foata normal form. 7/2730 useless extension candidates. Maximal degree in co-relation 11580. Up to 2612 conditions per place. [2024-06-14 12:56:06,533 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 24 changer transitions 0/120 dead transitions. [2024-06-14 12:56:06,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 120 transitions, 994 flow [2024-06-14 12:56:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:56:06,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 12:56:06,535 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 607 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:56:06,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 120 transitions, 994 flow [2024-06-14 12:56:06,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 120 transitions, 958 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:06,552 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 685 flow [2024-06-14 12:56:06,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-14 12:56:06,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 12:56:06,553 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 685 flow [2024-06-14 12:56:06,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:06,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:06,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:06,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:56:06,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:06,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:06,554 INFO L85 PathProgramCache]: Analyzing trace with hash -612168765, now seen corresponding path program 3 times [2024-06-14 12:56:06,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:06,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972196629] [2024-06-14 12:56:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:06,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:07,527 INFO 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 12:56:07,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:07,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972196629] [2024-06-14 12:56:07,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972196629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:07,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:07,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:07,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185998240] [2024-06-14 12:56:07,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:07,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:07,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 685 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:07,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:07,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:07,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:08,128 INFO L124 PetriNetUnfolderBase]: 1816/2706 cut-off events. [2024-06-14 12:56:08,128 INFO L125 PetriNetUnfolderBase]: For 14143/14146 co-relation queries the response was YES. [2024-06-14 12:56:08,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 2706 events. 1816/2706 cut-off events. For 14143/14146 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12361 event pairs, 654 based on Foata normal form. 7/2711 useless extension candidates. Maximal degree in co-relation 11802. Up to 2587 conditions per place. [2024-06-14 12:56:08,151 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 90 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-14 12:56:08,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1005 flow [2024-06-14 12:56:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:56:08,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:56:08,153 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 685 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:56:08,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1005 flow [2024-06-14 12:56:08,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 940 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:08,176 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 684 flow [2024-06-14 12:56:08,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=684, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-14 12:56:08,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-14 12:56:08,178 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 684 flow [2024-06-14 12:56:08,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:08,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:08,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:56:08,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:08,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash -636062139, now seen corresponding path program 2 times [2024-06-14 12:56:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172476042] [2024-06-14 12:56:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:09,011 INFO 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 12:56:09,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172476042] [2024-06-14 12:56:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172476042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:09,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:09,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:09,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268896025] [2024-06-14 12:56:09,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:09,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:09,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:09,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:09,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 684 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:09,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:09,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:09,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:09,544 INFO L124 PetriNetUnfolderBase]: 1838/2739 cut-off events. [2024-06-14 12:56:09,544 INFO L125 PetriNetUnfolderBase]: For 16304/16307 co-relation queries the response was YES. [2024-06-14 12:56:09,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12172 conditions, 2739 events. 1838/2739 cut-off events. For 16304/16307 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12485 event pairs, 640 based on Foata normal form. 6/2742 useless extension candidates. Maximal degree in co-relation 12133. Up to 2679 conditions per place. [2024-06-14 12:56:09,565 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 93 selfloop transitions, 16 changer transitions 0/112 dead transitions. [2024-06-14 12:56:09,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 976 flow [2024-06-14 12:56:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 12:56:09,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:56:09,567 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 684 flow. Second operand 6 states and 99 transitions. [2024-06-14 12:56:09,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 976 flow [2024-06-14 12:56:09,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 112 transitions, 917 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:09,591 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 711 flow [2024-06-14 12:56:09,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=711, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-06-14 12:56:09,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 12:56:09,592 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 711 flow [2024-06-14 12:56:09,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:09,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:09,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:56:09,593 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:09,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:09,593 INFO L85 PathProgramCache]: Analyzing trace with hash -636299289, now seen corresponding path program 3 times [2024-06-14 12:56:09,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:09,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151388663] [2024-06-14 12:56:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:09,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:10,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:10,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151388663] [2024-06-14 12:56:10,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151388663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:10,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:10,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:10,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171754457] [2024-06-14 12:56:10,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:10,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:10,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:10,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:10,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 711 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:10,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:10,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:10,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:10,999 INFO L124 PetriNetUnfolderBase]: 1844/2748 cut-off events. [2024-06-14 12:56:10,999 INFO L125 PetriNetUnfolderBase]: For 18556/18559 co-relation queries the response was YES. [2024-06-14 12:56:11,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 2748 events. 1844/2748 cut-off events. For 18556/18559 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12598 event pairs, 627 based on Foata normal form. 4/2749 useless extension candidates. Maximal degree in co-relation 12482. Up to 2608 conditions per place. [2024-06-14 12:56:11,022 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 89 selfloop transitions, 30 changer transitions 0/122 dead transitions. [2024-06-14 12:56:11,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 122 transitions, 1086 flow [2024-06-14 12:56:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:56:11,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:56:11,025 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 711 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:56:11,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 122 transitions, 1086 flow [2024-06-14 12:56:11,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 1062 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:11,054 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 811 flow [2024-06-14 12:56:11,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=811, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-14 12:56:11,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-14 12:56:11,055 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 811 flow [2024-06-14 12:56:11,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:11,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:11,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:11,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:56:11,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:11,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash -636053211, now seen corresponding path program 1 times [2024-06-14 12:56:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:11,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728029326] [2024-06-14 12:56:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:11,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:12,362 INFO 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 12:56:12,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:12,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728029326] [2024-06-14 12:56:12,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728029326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:12,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:12,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:12,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422365163] [2024-06-14 12:56:12,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:12,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:12,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:12,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:12,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:12,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 811 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:12,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:12,983 INFO L124 PetriNetUnfolderBase]: 1836/2735 cut-off events. [2024-06-14 12:56:12,983 INFO L125 PetriNetUnfolderBase]: For 21158/21164 co-relation queries the response was YES. [2024-06-14 12:56:12,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12836 conditions, 2735 events. 1836/2735 cut-off events. For 21158/21164 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12461 event pairs, 615 based on Foata normal form. 8/2741 useless extension candidates. Maximal degree in co-relation 12792. Up to 2676 conditions per place. [2024-06-14 12:56:12,999 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 101 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-06-14 12:56:12,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1099 flow [2024-06-14 12:56:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 12:56:13,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:56:13,001 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 811 flow. Second operand 6 states and 98 transitions. [2024-06-14 12:56:13,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1099 flow [2024-06-14 12:56:13,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 1040 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:13,030 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 809 flow [2024-06-14 12:56:13,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=809, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2024-06-14 12:56:13,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 12:56:13,031 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 809 flow [2024-06-14 12:56:13,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:13,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:13,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:13,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:56:13,032 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:13,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1042643792, now seen corresponding path program 1 times [2024-06-14 12:56:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:13,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032628816] [2024-06-14 12:56:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:14,310 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 12:56:14,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032628816] [2024-06-14 12:56:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032628816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:14,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948542321] [2024-06-14 12:56:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:14,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:14,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 809 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:14,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:14,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:14,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:15,078 INFO L124 PetriNetUnfolderBase]: 1879/2798 cut-off events. [2024-06-14 12:56:15,078 INFO L125 PetriNetUnfolderBase]: For 21862/21865 co-relation queries the response was YES. [2024-06-14 12:56:15,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13173 conditions, 2798 events. 1879/2798 cut-off events. For 21862/21865 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12818 event pairs, 564 based on Foata normal form. 2/2797 useless extension candidates. Maximal degree in co-relation 13129. Up to 2467 conditions per place. [2024-06-14 12:56:15,098 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 110 selfloop transitions, 46 changer transitions 0/159 dead transitions. [2024-06-14 12:56:15,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 159 transitions, 1497 flow [2024-06-14 12:56:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:56:15,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 12:56:15,100 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 809 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:56:15,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 159 transitions, 1497 flow [2024-06-14 12:56:15,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 159 transitions, 1458 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:15,129 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 1006 flow [2024-06-14 12:56:15,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1006, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-14 12:56:15,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-14 12:56:15,130 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 1006 flow [2024-06-14 12:56:15,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:15,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:15,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:15,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:56:15,131 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:15,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1042553582, now seen corresponding path program 2 times [2024-06-14 12:56:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:15,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601003554] [2024-06-14 12:56:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:16,340 INFO 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 12:56:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601003554] [2024-06-14 12:56:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601003554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:16,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:16,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253032488] [2024-06-14 12:56:16,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:16,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:16,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:16,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:16,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:16,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:16,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:17,182 INFO L124 PetriNetUnfolderBase]: 1950/2902 cut-off events. [2024-06-14 12:56:17,182 INFO L125 PetriNetUnfolderBase]: For 27409/27412 co-relation queries the response was YES. [2024-06-14 12:56:17,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14720 conditions, 2902 events. 1950/2902 cut-off events. For 27409/27412 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13363 event pairs, 566 based on Foata normal form. 6/2905 useless extension candidates. Maximal degree in co-relation 14674. Up to 2592 conditions per place. [2024-06-14 12:56:17,198 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 44 changer transitions 0/164 dead transitions. [2024-06-14 12:56:17,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 164 transitions, 1684 flow [2024-06-14 12:56:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:56:17,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 12:56:17,199 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 1006 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:56:17,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 164 transitions, 1684 flow [2024-06-14 12:56:17,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 164 transitions, 1599 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:17,227 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 1104 flow [2024-06-14 12:56:17,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1104, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2024-06-14 12:56:17,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 12:56:17,228 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 1104 flow [2024-06-14 12:56:17,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:17,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:17,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:17,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:56:17,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:17,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1042553427, now seen corresponding path program 1 times [2024-06-14 12:56:17,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:17,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937075906] [2024-06-14 12:56:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:17,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:18,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937075906] [2024-06-14 12:56:18,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937075906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:18,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:18,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292226577] [2024-06-14 12:56:18,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:18,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 1104 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:18,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:18,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:18,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:18,913 INFO L124 PetriNetUnfolderBase]: 1956/2910 cut-off events. [2024-06-14 12:56:18,913 INFO L125 PetriNetUnfolderBase]: For 30050/30053 co-relation queries the response was YES. [2024-06-14 12:56:18,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15018 conditions, 2910 events. 1956/2910 cut-off events. For 30050/30053 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13430 event pairs, 544 based on Foata normal form. 8/2915 useless extension candidates. Maximal degree in co-relation 14970. Up to 2490 conditions per place. [2024-06-14 12:56:18,930 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 110 selfloop transitions, 56 changer transitions 0/169 dead transitions. [2024-06-14 12:56:18,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 169 transitions, 1740 flow [2024-06-14 12:56:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:56:18,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 12:56:18,932 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 1104 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:56:18,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 169 transitions, 1740 flow [2024-06-14 12:56:18,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 169 transitions, 1620 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:18,980 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1209 flow [2024-06-14 12:56:18,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-06-14 12:56:18,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 12:56:18,980 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1209 flow [2024-06-14 12:56:18,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:18,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:18,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:18,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:56:18,981 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:18,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:18,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1038834512, now seen corresponding path program 3 times [2024-06-14 12:56:18,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:18,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035451266] [2024-06-14 12:56:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:18,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:20,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035451266] [2024-06-14 12:56:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035451266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:20,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419427995] [2024-06-14 12:56:20,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:20,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:20,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:20,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1209 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:20,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:20,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:20,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:21,032 INFO L124 PetriNetUnfolderBase]: 2027/3014 cut-off events. [2024-06-14 12:56:21,032 INFO L125 PetriNetUnfolderBase]: For 34888/34891 co-relation queries the response was YES. [2024-06-14 12:56:21,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16205 conditions, 3014 events. 2027/3014 cut-off events. For 34888/34891 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13950 event pairs, 570 based on Foata normal form. 6/3017 useless extension candidates. Maximal degree in co-relation 16155. Up to 2793 conditions per place. [2024-06-14 12:56:21,052 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 37 changer transitions 0/172 dead transitions. [2024-06-14 12:56:21,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 172 transitions, 1847 flow [2024-06-14 12:56:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:56:21,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:56:21,055 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1209 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:56:21,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 172 transitions, 1847 flow [2024-06-14 12:56:21,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 172 transitions, 1788 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:21,105 INFO L231 Difference]: Finished difference. Result has 112 places, 137 transitions, 1335 flow [2024-06-14 12:56:21,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1335, PETRI_PLACES=112, PETRI_TRANSITIONS=137} [2024-06-14 12:56:21,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-14 12:56:21,106 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 137 transitions, 1335 flow [2024-06-14 12:56:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:21,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:21,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:56:21,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:21,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1038834357, now seen corresponding path program 2 times [2024-06-14 12:56:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:21,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885404400] [2024-06-14 12:56:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:21,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:22,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885404400] [2024-06-14 12:56:22,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885404400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:22,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:22,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:22,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763186118] [2024-06-14 12:56:22,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:22,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:22,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:22,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 1335 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:22,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:22,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:22,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:22,858 INFO L124 PetriNetUnfolderBase]: 2071/3078 cut-off events. [2024-06-14 12:56:22,858 INFO L125 PetriNetUnfolderBase]: For 39382/39385 co-relation queries the response was YES. [2024-06-14 12:56:22,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17037 conditions, 3078 events. 2071/3078 cut-off events. For 39382/39385 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14268 event pairs, 579 based on Foata normal form. 8/3083 useless extension candidates. Maximal degree in co-relation 16984. Up to 2816 conditions per place. [2024-06-14 12:56:22,878 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 133 selfloop transitions, 42 changer transitions 0/178 dead transitions. [2024-06-14 12:56:22,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 1985 flow [2024-06-14 12:56:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:56:22,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:56:22,879 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 1335 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:56:22,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 1985 flow [2024-06-14 12:56:22,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 178 transitions, 1891 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:22,932 INFO L231 Difference]: Finished difference. Result has 116 places, 144 transitions, 1435 flow [2024-06-14 12:56:22,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1435, PETRI_PLACES=116, PETRI_TRANSITIONS=144} [2024-06-14 12:56:22,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 12:56:22,933 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 144 transitions, 1435 flow [2024-06-14 12:56:22,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:22,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:22,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:22,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:56:22,934 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:22,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash 543925257, now seen corresponding path program 3 times [2024-06-14 12:56:22,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:22,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804506633] [2024-06-14 12:56:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:22,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:23,883 INFO 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 12:56:23,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:23,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804506633] [2024-06-14 12:56:23,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804506633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:23,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:23,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:23,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963245712] [2024-06-14 12:56:23,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:23,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:23,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:23,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:23,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 144 transitions, 1435 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:23,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:23,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:23,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:24,712 INFO L124 PetriNetUnfolderBase]: 2226/3317 cut-off events. [2024-06-14 12:56:24,713 INFO L125 PetriNetUnfolderBase]: For 45160/45163 co-relation queries the response was YES. [2024-06-14 12:56:24,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18770 conditions, 3317 events. 2226/3317 cut-off events. For 45160/45163 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15540 event pairs, 954 based on Foata normal form. 4/3318 useless extension candidates. Maximal degree in co-relation 18715. Up to 3058 conditions per place. [2024-06-14 12:56:24,734 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 159 selfloop transitions, 47 changer transitions 0/209 dead transitions. [2024-06-14 12:56:24,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 209 transitions, 2387 flow [2024-06-14 12:56:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:56:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:56:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-14 12:56:24,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:56:24,736 INFO L175 Difference]: Start difference. First operand has 116 places, 144 transitions, 1435 flow. Second operand 11 states and 176 transitions. [2024-06-14 12:56:24,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 209 transitions, 2387 flow [2024-06-14 12:56:24,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 209 transitions, 2246 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:24,793 INFO L231 Difference]: Finished difference. Result has 128 places, 170 transitions, 1843 flow [2024-06-14 12:56:24,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1843, PETRI_PLACES=128, PETRI_TRANSITIONS=170} [2024-06-14 12:56:24,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 12:56:24,794 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 1843 flow [2024-06-14 12:56:24,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:24,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:24,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:24,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:56:24,794 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:24,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -557190079, now seen corresponding path program 4 times [2024-06-14 12:56:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:24,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239629070] [2024-06-14 12:56:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:25,607 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 12:56:25,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239629070] [2024-06-14 12:56:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239629070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:25,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:25,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:25,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475909113] [2024-06-14 12:56:25,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:25,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:25,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:25,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:25,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:25,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:25,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 170 transitions, 1843 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:25,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:25,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:25,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:26,635 INFO L124 PetriNetUnfolderBase]: 2374/3539 cut-off events. [2024-06-14 12:56:26,636 INFO L125 PetriNetUnfolderBase]: For 51057/51060 co-relation queries the response was YES. [2024-06-14 12:56:26,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20690 conditions, 3539 events. 2374/3539 cut-off events. For 51057/51060 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16833 event pairs, 829 based on Foata normal form. 4/3540 useless extension candidates. Maximal degree in co-relation 20628. Up to 3119 conditions per place. [2024-06-14 12:56:26,662 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 163 selfloop transitions, 95 changer transitions 0/261 dead transitions. [2024-06-14 12:56:26,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 261 transitions, 3258 flow [2024-06-14 12:56:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:56:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:56:26,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 12:56:26,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-14 12:56:26,664 INFO L175 Difference]: Start difference. First operand has 128 places, 170 transitions, 1843 flow. Second operand 11 states and 189 transitions. [2024-06-14 12:56:26,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 261 transitions, 3258 flow [2024-06-14 12:56:26,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 261 transitions, 3165 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:26,744 INFO L231 Difference]: Finished difference. Result has 142 places, 213 transitions, 2706 flow [2024-06-14 12:56:26,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2706, PETRI_PLACES=142, PETRI_TRANSITIONS=213} [2024-06-14 12:56:26,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-14 12:56:26,745 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 213 transitions, 2706 flow [2024-06-14 12:56:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:26,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:26,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:56:26,746 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:26,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1749554066, now seen corresponding path program 4 times [2024-06-14 12:56:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989181859] [2024-06-14 12:56:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:26,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:27,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989181859] [2024-06-14 12:56:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989181859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:27,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:27,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:27,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070773218] [2024-06-14 12:56:27,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:27,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:27,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 213 transitions, 2706 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:27,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:27,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:27,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:28,559 INFO L124 PetriNetUnfolderBase]: 2365/3514 cut-off events. [2024-06-14 12:56:28,559 INFO L125 PetriNetUnfolderBase]: For 55120/55131 co-relation queries the response was YES. [2024-06-14 12:56:28,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21577 conditions, 3514 events. 2365/3514 cut-off events. For 55120/55131 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16519 event pairs, 777 based on Foata normal form. 14/3525 useless extension candidates. Maximal degree in co-relation 21507. Up to 3205 conditions per place. [2024-06-14 12:56:28,582 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 189 selfloop transitions, 56 changer transitions 0/248 dead transitions. [2024-06-14 12:56:28,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 248 transitions, 3467 flow [2024-06-14 12:56:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:56:28,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-14 12:56:28,584 INFO L175 Difference]: Start difference. First operand has 142 places, 213 transitions, 2706 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:56:28,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 248 transitions, 3467 flow [2024-06-14 12:56:28,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 248 transitions, 3277 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:56:28,660 INFO L231 Difference]: Finished difference. Result has 142 places, 213 transitions, 2642 flow [2024-06-14 12:56:28,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2642, PETRI_PLACES=142, PETRI_TRANSITIONS=213} [2024-06-14 12:56:28,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-14 12:56:28,661 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 213 transitions, 2642 flow [2024-06-14 12:56:28,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:28,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:28,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:28,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:56:28,661 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:28,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1484695915, now seen corresponding path program 5 times [2024-06-14 12:56:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390087769] [2024-06-14 12:56:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:29,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:29,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390087769] [2024-06-14 12:56:29,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390087769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:29,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:29,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:29,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99986745] [2024-06-14 12:56:29,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:29,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:29,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:29,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 213 transitions, 2642 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:29,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:29,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:29,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:30,252 INFO L124 PetriNetUnfolderBase]: 2377/3534 cut-off events. [2024-06-14 12:56:30,252 INFO L125 PetriNetUnfolderBase]: For 59314/59325 co-relation queries the response was YES. [2024-06-14 12:56:30,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21672 conditions, 3534 events. 2377/3534 cut-off events. For 59314/59325 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16667 event pairs, 779 based on Foata normal form. 16/3547 useless extension candidates. Maximal degree in co-relation 21601. Up to 3182 conditions per place. [2024-06-14 12:56:30,279 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 60 changer transitions 0/248 dead transitions. [2024-06-14 12:56:30,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 248 transitions, 3445 flow [2024-06-14 12:56:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:56:30,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 12:56:30,280 INFO L175 Difference]: Start difference. First operand has 142 places, 213 transitions, 2642 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:56:30,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 248 transitions, 3445 flow [2024-06-14 12:56:30,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 248 transitions, 3214 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:56:30,341 INFO L231 Difference]: Finished difference. Result has 143 places, 217 transitions, 2623 flow [2024-06-14 12:56:30,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2623, PETRI_PLACES=143, PETRI_TRANSITIONS=217} [2024-06-14 12:56:30,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 12:56:30,342 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 217 transitions, 2623 flow [2024-06-14 12:56:30,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:30,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:30,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:56:30,342 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:30,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:30,342 INFO L85 PathProgramCache]: Analyzing trace with hash -92104375, now seen corresponding path program 6 times [2024-06-14 12:56:30,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:30,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608397838] [2024-06-14 12:56:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:30,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:31,176 INFO 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 12:56:31,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:31,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608397838] [2024-06-14 12:56:31,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608397838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:31,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154055200] [2024-06-14 12:56:31,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:31,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:31,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:31,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 217 transitions, 2623 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:31,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:31,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:32,029 INFO L124 PetriNetUnfolderBase]: 2399/3566 cut-off events. [2024-06-14 12:56:32,029 INFO L125 PetriNetUnfolderBase]: For 62574/62583 co-relation queries the response was YES. [2024-06-14 12:56:32,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21838 conditions, 3566 events. 2399/3566 cut-off events. For 62574/62583 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16805 event pairs, 632 based on Foata normal form. 10/3573 useless extension candidates. Maximal degree in co-relation 21766. Up to 3191 conditions per place. [2024-06-14 12:56:32,057 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 191 selfloop transitions, 54 changer transitions 0/248 dead transitions. [2024-06-14 12:56:32,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 248 transitions, 3335 flow [2024-06-14 12:56:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:56:32,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-14 12:56:32,058 INFO L175 Difference]: Start difference. First operand has 143 places, 217 transitions, 2623 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:56:32,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 248 transitions, 3335 flow [2024-06-14 12:56:32,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 248 transitions, 3144 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:32,137 INFO L231 Difference]: Finished difference. Result has 145 places, 220 transitions, 2593 flow [2024-06-14 12:56:32,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2593, PETRI_PLACES=145, PETRI_TRANSITIONS=220} [2024-06-14 12:56:32,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 12:56:32,138 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 220 transitions, 2593 flow [2024-06-14 12:56:32,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:32,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:32,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:32,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:56:32,139 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:32,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1756911451, now seen corresponding path program 7 times [2024-06-14 12:56:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:32,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552936884] [2024-06-14 12:56:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:32,901 INFO 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 12:56:32,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:32,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552936884] [2024-06-14 12:56:32,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552936884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:32,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:32,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:32,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946169870] [2024-06-14 12:56:32,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:32,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:32,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:32,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:32,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 220 transitions, 2593 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:32,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:32,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:32,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:33,686 INFO L124 PetriNetUnfolderBase]: 2402/3576 cut-off events. [2024-06-14 12:56:33,686 INFO L125 PetriNetUnfolderBase]: For 66488/66494 co-relation queries the response was YES. [2024-06-14 12:56:33,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21931 conditions, 3576 events. 2402/3576 cut-off events. For 66488/66494 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16959 event pairs, 987 based on Foata normal form. 8/3581 useless extension candidates. Maximal degree in co-relation 21858. Up to 3461 conditions per place. [2024-06-14 12:56:33,713 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 23 changer transitions 0/243 dead transitions. [2024-06-14 12:56:33,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 243 transitions, 3181 flow [2024-06-14 12:56:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:56:33,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:56:33,715 INFO L175 Difference]: Start difference. First operand has 145 places, 220 transitions, 2593 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:56:33,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 243 transitions, 3181 flow [2024-06-14 12:56:33,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 243 transitions, 3109 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:33,802 INFO L231 Difference]: Finished difference. Result has 149 places, 223 transitions, 2626 flow [2024-06-14 12:56:33,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2626, PETRI_PLACES=149, PETRI_TRANSITIONS=223} [2024-06-14 12:56:33,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 12:56:33,802 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 223 transitions, 2626 flow [2024-06-14 12:56:33,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:33,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:33,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:33,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:56:33,803 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:33,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:33,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1757178578, now seen corresponding path program 1 times [2024-06-14 12:56:33,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:33,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895212862] [2024-06-14 12:56:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:33,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:34,676 INFO 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 12:56:34,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:34,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895212862] [2024-06-14 12:56:34,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895212862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:34,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:34,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898695013] [2024-06-14 12:56:34,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:34,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:34,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:34,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:34,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 223 transitions, 2626 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:34,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:34,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:34,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:35,376 INFO L124 PetriNetUnfolderBase]: 2394/3564 cut-off events. [2024-06-14 12:56:35,376 INFO L125 PetriNetUnfolderBase]: For 70391/70397 co-relation queries the response was YES. [2024-06-14 12:56:35,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21861 conditions, 3564 events. 2394/3564 cut-off events. For 70391/70397 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16886 event pairs, 981 based on Foata normal form. 7/3569 useless extension candidates. Maximal degree in co-relation 21787. Up to 3468 conditions per place. [2024-06-14 12:56:35,408 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 25 changer transitions 0/240 dead transitions. [2024-06-14 12:56:35,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 240 transitions, 3190 flow [2024-06-14 12:56:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 12:56:35,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:56:35,409 INFO L175 Difference]: Start difference. First operand has 149 places, 223 transitions, 2626 flow. Second operand 6 states and 99 transitions. [2024-06-14 12:56:35,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 240 transitions, 3190 flow [2024-06-14 12:56:35,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 240 transitions, 3111 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:35,499 INFO L231 Difference]: Finished difference. Result has 150 places, 225 transitions, 2661 flow [2024-06-14 12:56:35,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2661, PETRI_PLACES=150, PETRI_TRANSITIONS=225} [2024-06-14 12:56:35,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-14 12:56:35,500 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 225 transitions, 2661 flow [2024-06-14 12:56:35,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:35,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:35,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:56:35,501 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:35,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1794754848, now seen corresponding path program 1 times [2024-06-14 12:56:35,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:35,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406637073] [2024-06-14 12:56:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:36,234 INFO 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 12:56:36,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:36,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406637073] [2024-06-14 12:56:36,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406637073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:36,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:36,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:36,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213394012] [2024-06-14 12:56:36,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:36,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:36,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:36,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:36,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:36,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 225 transitions, 2661 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:36,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:36,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:37,356 INFO L124 PetriNetUnfolderBase]: 2851/4325 cut-off events. [2024-06-14 12:56:37,357 INFO L125 PetriNetUnfolderBase]: For 97065/97129 co-relation queries the response was YES. [2024-06-14 12:56:37,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26532 conditions, 4325 events. 2851/4325 cut-off events. For 97065/97129 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22788 event pairs, 693 based on Foata normal form. 56/4345 useless extension candidates. Maximal degree in co-relation 26457. Up to 2764 conditions per place. [2024-06-14 12:56:37,392 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 141 selfloop transitions, 178 changer transitions 0/345 dead transitions. [2024-06-14 12:56:37,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 345 transitions, 4482 flow [2024-06-14 12:56:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:56:37,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-14 12:56:37,394 INFO L175 Difference]: Start difference. First operand has 150 places, 225 transitions, 2661 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:56:37,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 345 transitions, 4482 flow [2024-06-14 12:56:37,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 345 transitions, 4427 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:37,497 INFO L231 Difference]: Finished difference. Result has 158 places, 281 transitions, 3679 flow [2024-06-14 12:56:37,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3679, PETRI_PLACES=158, PETRI_TRANSITIONS=281} [2024-06-14 12:56:37,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 12:56:37,497 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 281 transitions, 3679 flow [2024-06-14 12:56:37,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:37,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:37,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:56:37,498 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:37,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1797582978, now seen corresponding path program 2 times [2024-06-14 12:56:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452671587] [2024-06-14 12:56:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:38,300 INFO 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 12:56:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452671587] [2024-06-14 12:56:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452671587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:38,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:38,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992738679] [2024-06-14 12:56:38,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:38,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:38,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:38,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 281 transitions, 3679 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:38,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:38,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:38,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:39,343 INFO L124 PetriNetUnfolderBase]: 2956/4492 cut-off events. [2024-06-14 12:56:39,344 INFO L125 PetriNetUnfolderBase]: For 104337/104437 co-relation queries the response was YES. [2024-06-14 12:56:39,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28739 conditions, 4492 events. 2956/4492 cut-off events. For 104337/104437 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23960 event pairs, 765 based on Foata normal form. 71/4526 useless extension candidates. Maximal degree in co-relation 28660. Up to 3153 conditions per place. [2024-06-14 12:56:39,387 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 139 selfloop transitions, 188 changer transitions 0/353 dead transitions. [2024-06-14 12:56:39,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 353 transitions, 4979 flow [2024-06-14 12:56:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:56:39,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-14 12:56:39,389 INFO L175 Difference]: Start difference. First operand has 158 places, 281 transitions, 3679 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:56:39,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 353 transitions, 4979 flow [2024-06-14 12:56:39,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 353 transitions, 4896 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:39,539 INFO L231 Difference]: Finished difference. Result has 165 places, 295 transitions, 4211 flow [2024-06-14 12:56:39,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4211, PETRI_PLACES=165, PETRI_TRANSITIONS=295} [2024-06-14 12:56:39,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-14 12:56:39,539 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 295 transitions, 4211 flow [2024-06-14 12:56:39,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:39,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:39,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:39,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:56:39,540 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:39,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash 464083680, now seen corresponding path program 3 times [2024-06-14 12:56:39,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:39,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55612379] [2024-06-14 12:56:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:39,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:40,404 INFO 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 12:56:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:40,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55612379] [2024-06-14 12:56:40,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55612379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:40,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:40,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:40,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382717320] [2024-06-14 12:56:40,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:40,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:40,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:40,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 295 transitions, 4211 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:40,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:40,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:40,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:41,479 INFO L124 PetriNetUnfolderBase]: 3217/4841 cut-off events. [2024-06-14 12:56:41,479 INFO L125 PetriNetUnfolderBase]: For 98240/98257 co-relation queries the response was YES. [2024-06-14 12:56:41,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31708 conditions, 4841 events. 3217/4841 cut-off events. For 98240/98257 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25115 event pairs, 711 based on Foata normal form. 18/4857 useless extension candidates. Maximal degree in co-relation 31626. Up to 4242 conditions per place. [2024-06-14 12:56:41,518 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 270 selfloop transitions, 108 changer transitions 0/381 dead transitions. [2024-06-14 12:56:41,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 381 transitions, 5879 flow [2024-06-14 12:56:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:56:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:56:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:56:41,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-14 12:56:41,520 INFO L175 Difference]: Start difference. First operand has 165 places, 295 transitions, 4211 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:56:41,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 381 transitions, 5879 flow [2024-06-14 12:56:41,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 381 transitions, 5451 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:41,678 INFO L231 Difference]: Finished difference. Result has 173 places, 334 transitions, 4766 flow [2024-06-14 12:56:41,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4766, PETRI_PLACES=173, PETRI_TRANSITIONS=334} [2024-06-14 12:56:41,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 12:56:41,679 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 334 transitions, 4766 flow [2024-06-14 12:56:41,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:41,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:41,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:56:41,680 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:41,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 568572324, now seen corresponding path program 4 times [2024-06-14 12:56:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:41,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316912909] [2024-06-14 12:56:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:41,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:42,724 INFO 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 12:56:42,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:42,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316912909] [2024-06-14 12:56:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316912909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:42,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:42,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300184553] [2024-06-14 12:56:42,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:42,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:42,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:42,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 334 transitions, 4766 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:42,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:42,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:42,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:44,254 INFO L124 PetriNetUnfolderBase]: 4021/6083 cut-off events. [2024-06-14 12:56:44,254 INFO L125 PetriNetUnfolderBase]: For 129002/129011 co-relation queries the response was YES. [2024-06-14 12:56:44,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41232 conditions, 6083 events. 4021/6083 cut-off events. For 129002/129011 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33598 event pairs, 1024 based on Foata normal form. 10/6090 useless extension candidates. Maximal degree in co-relation 41145. Up to 4569 conditions per place. [2024-06-14 12:56:44,306 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 302 selfloop transitions, 243 changer transitions 0/548 dead transitions. [2024-06-14 12:56:44,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 548 transitions, 8759 flow [2024-06-14 12:56:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:56:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:56:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:56:44,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-14 12:56:44,308 INFO L175 Difference]: Start difference. First operand has 173 places, 334 transitions, 4766 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:56:44,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 548 transitions, 8759 flow [2024-06-14 12:56:44,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 548 transitions, 8482 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:44,605 INFO L231 Difference]: Finished difference. Result has 184 places, 482 transitions, 7630 flow [2024-06-14 12:56:44,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7630, PETRI_PLACES=184, PETRI_TRANSITIONS=482} [2024-06-14 12:56:44,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-14 12:56:44,606 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 482 transitions, 7630 flow [2024-06-14 12:56:44,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:44,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:44,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:44,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:56:44,607 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:44,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash 568632774, now seen corresponding path program 5 times [2024-06-14 12:56:44,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:44,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490595145] [2024-06-14 12:56:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:45,624 INFO 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 12:56:45,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:45,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490595145] [2024-06-14 12:56:45,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490595145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:45,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:45,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:45,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862822541] [2024-06-14 12:56:45,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:45,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:45,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:45,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:45,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:45,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 482 transitions, 7630 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:45,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:45,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:45,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:47,168 INFO L124 PetriNetUnfolderBase]: 4071/6163 cut-off events. [2024-06-14 12:56:47,168 INFO L125 PetriNetUnfolderBase]: For 143261/143271 co-relation queries the response was YES. [2024-06-14 12:56:47,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44603 conditions, 6163 events. 4071/6163 cut-off events. For 143261/143271 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34226 event pairs, 1065 based on Foata normal form. 14/6174 useless extension candidates. Maximal degree in co-relation 44510. Up to 5160 conditions per place. [2024-06-14 12:56:47,237 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 313 selfloop transitions, 229 changer transitions 0/545 dead transitions. [2024-06-14 12:56:47,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 545 transitions, 9431 flow [2024-06-14 12:56:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:56:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:56:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:56:47,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-14 12:56:47,238 INFO L175 Difference]: Start difference. First operand has 184 places, 482 transitions, 7630 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:56:47,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 545 transitions, 9431 flow [2024-06-14 12:56:47,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 545 transitions, 9382 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:47,771 INFO L231 Difference]: Finished difference. Result has 193 places, 490 transitions, 8263 flow [2024-06-14 12:56:47,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7581, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8263, PETRI_PLACES=193, PETRI_TRANSITIONS=490} [2024-06-14 12:56:47,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-14 12:56:47,771 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 490 transitions, 8263 flow [2024-06-14 12:56:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:47,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:47,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:47,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:56:47,772 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:47,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:47,772 INFO L85 PathProgramCache]: Analyzing trace with hash 571429284, now seen corresponding path program 6 times [2024-06-14 12:56:47,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:47,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094647788] [2024-06-14 12:56:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:47,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:48,718 INFO 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 12:56:48,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:48,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094647788] [2024-06-14 12:56:48,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094647788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:48,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:48,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983271412] [2024-06-14 12:56:48,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:48,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:48,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:48,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 490 transitions, 8263 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:48,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:48,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:48,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:50,460 INFO L124 PetriNetUnfolderBase]: 4234/6432 cut-off events. [2024-06-14 12:56:50,461 INFO L125 PetriNetUnfolderBase]: For 169581/169591 co-relation queries the response was YES. [2024-06-14 12:56:50,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47531 conditions, 6432 events. 4234/6432 cut-off events. For 169581/169591 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 36239 event pairs, 1087 based on Foata normal form. 44/6473 useless extension candidates. Maximal degree in co-relation 47435. Up to 5349 conditions per place. [2024-06-14 12:56:50,529 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 362 selfloop transitions, 192 changer transitions 0/557 dead transitions. [2024-06-14 12:56:50,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 557 transitions, 10135 flow [2024-06-14 12:56:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:56:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:56:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:56:50,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-14 12:56:50,531 INFO L175 Difference]: Start difference. First operand has 193 places, 490 transitions, 8263 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:56:50,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 557 transitions, 10135 flow [2024-06-14 12:56:51,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 557 transitions, 9703 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:51,024 INFO L231 Difference]: Finished difference. Result has 198 places, 499 transitions, 8486 flow [2024-06-14 12:56:51,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7831, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8486, PETRI_PLACES=198, PETRI_TRANSITIONS=499} [2024-06-14 12:56:51,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 12:56:51,025 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 499 transitions, 8486 flow [2024-06-14 12:56:51,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:51,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:51,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:51,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:56:51,025 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:51,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1576334646, now seen corresponding path program 7 times [2024-06-14 12:56:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:51,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709511403] [2024-06-14 12:56:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:51,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:52,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709511403] [2024-06-14 12:56:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709511403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:52,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:52,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:52,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640888175] [2024-06-14 12:56:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:52,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:52,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:52,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 499 transitions, 8486 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:52,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:52,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:52,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:53,656 INFO L124 PetriNetUnfolderBase]: 4245/6455 cut-off events. [2024-06-14 12:56:53,657 INFO L125 PetriNetUnfolderBase]: For 171173/171179 co-relation queries the response was YES. [2024-06-14 12:56:53,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47486 conditions, 6455 events. 4245/6455 cut-off events. For 171173/171179 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 36479 event pairs, 1284 based on Foata normal form. 40/6492 useless extension candidates. Maximal degree in co-relation 47388. Up to 5758 conditions per place. [2024-06-14 12:56:53,725 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 441 selfloop transitions, 107 changer transitions 0/551 dead transitions. [2024-06-14 12:56:53,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 551 transitions, 9935 flow [2024-06-14 12:56:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:56:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:56:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:56:53,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:56:53,728 INFO L175 Difference]: Start difference. First operand has 198 places, 499 transitions, 8486 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:56:53,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 551 transitions, 9935 flow [2024-06-14 12:56:54,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 551 transitions, 9547 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:54,170 INFO L231 Difference]: Finished difference. Result has 204 places, 507 transitions, 8540 flow [2024-06-14 12:56:54,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8102, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8540, PETRI_PLACES=204, PETRI_TRANSITIONS=507} [2024-06-14 12:56:54,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-14 12:56:54,171 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 507 transitions, 8540 flow [2024-06-14 12:56:54,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:54,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:54,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:54,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:56:54,172 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:54,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:54,173 INFO L85 PathProgramCache]: Analyzing trace with hash 686905152, now seen corresponding path program 1 times [2024-06-14 12:56:54,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:54,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519389722] [2024-06-14 12:56:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:55,325 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 12:56:55,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519389722] [2024-06-14 12:56:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519389722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:55,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924863932] [2024-06-14 12:56:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:55,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:55,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 507 transitions, 8540 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:55,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:55,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:55,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:57,203 INFO L124 PetriNetUnfolderBase]: 4262/6479 cut-off events. [2024-06-14 12:56:57,204 INFO L125 PetriNetUnfolderBase]: For 161750/161756 co-relation queries the response was YES. [2024-06-14 12:56:57,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47659 conditions, 6479 events. 4262/6479 cut-off events. For 161750/161756 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 36659 event pairs, 1340 based on Foata normal form. 6/6482 useless extension candidates. Maximal degree in co-relation 47558. Up to 6153 conditions per place. [2024-06-14 12:56:57,264 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 454 selfloop transitions, 85 changer transitions 0/542 dead transitions. [2024-06-14 12:56:57,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 542 transitions, 9793 flow [2024-06-14 12:56:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:56:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-14 12:56:57,265 INFO L175 Difference]: Start difference. First operand has 204 places, 507 transitions, 8540 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:56:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 542 transitions, 9793 flow [2024-06-14 12:56:57,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 542 transitions, 9633 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:57,693 INFO L231 Difference]: Finished difference. Result has 209 places, 509 transitions, 8590 flow [2024-06-14 12:56:57,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8380, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8590, PETRI_PLACES=209, PETRI_TRANSITIONS=509} [2024-06-14 12:56:57,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-14 12:56:57,693 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 509 transitions, 8590 flow [2024-06-14 12:56:57,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:57,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:57,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:57,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:56:57,694 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:57,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash -436510790, now seen corresponding path program 8 times [2024-06-14 12:56:57,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:57,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470513141] [2024-06-14 12:56:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:57,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:58,752 INFO 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 12:56:58,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470513141] [2024-06-14 12:56:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470513141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:58,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:58,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:58,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929110120] [2024-06-14 12:56:58,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:58,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:58,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:58,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:58,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:58,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 509 transitions, 8590 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:58,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:58,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:58,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:00,355 INFO L124 PetriNetUnfolderBase]: 4548/6927 cut-off events. [2024-06-14 12:57:00,355 INFO L125 PetriNetUnfolderBase]: For 186673/186696 co-relation queries the response was YES. [2024-06-14 12:57:00,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51036 conditions, 6927 events. 4548/6927 cut-off events. For 186673/186696 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 39684 event pairs, 810 based on Foata normal form. 24/6948 useless extension candidates. Maximal degree in co-relation 50934. Up to 4055 conditions per place. [2024-06-14 12:57:00,429 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 175 selfloop transitions, 387 changer transitions 0/565 dead transitions. [2024-06-14 12:57:00,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 565 transitions, 10297 flow [2024-06-14 12:57:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:57:00,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-14 12:57:00,431 INFO L175 Difference]: Start difference. First operand has 209 places, 509 transitions, 8590 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:57:00,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 565 transitions, 10297 flow [2024-06-14 12:57:00,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 565 transitions, 10115 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:00,922 INFO L231 Difference]: Finished difference. Result has 213 places, 517 transitions, 9452 flow [2024-06-14 12:57:00,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8408, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9452, PETRI_PLACES=213, PETRI_TRANSITIONS=517} [2024-06-14 12:57:00,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 12:57:00,923 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 517 transitions, 9452 flow [2024-06-14 12:57:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:00,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:00,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:57:00,923 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:00,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash -436450340, now seen corresponding path program 9 times [2024-06-14 12:57:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:00,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122573146] [2024-06-14 12:57:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:00,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:02,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:02,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122573146] [2024-06-14 12:57:02,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122573146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:02,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:02,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:02,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145761047] [2024-06-14 12:57:02,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:02,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:02,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:02,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:02,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:02,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:02,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 517 transitions, 9452 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:02,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:02,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:03,684 INFO L124 PetriNetUnfolderBase]: 4615/7043 cut-off events. [2024-06-14 12:57:03,684 INFO L125 PetriNetUnfolderBase]: For 207506/207531 co-relation queries the response was YES. [2024-06-14 12:57:03,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54383 conditions, 7043 events. 4615/7043 cut-off events. For 207506/207531 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 40782 event pairs, 1115 based on Foata normal form. 28/7068 useless extension candidates. Maximal degree in co-relation 54279. Up to 5552 conditions per place. [2024-06-14 12:57:03,764 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 339 changer transitions 0/565 dead transitions. [2024-06-14 12:57:03,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 565 transitions, 10989 flow [2024-06-14 12:57:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:57:03,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:57:03,766 INFO L175 Difference]: Start difference. First operand has 213 places, 517 transitions, 9452 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:57:03,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 565 transitions, 10989 flow [2024-06-14 12:57:04,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 565 transitions, 10277 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:04,381 INFO L231 Difference]: Finished difference. Result has 215 places, 524 transitions, 9580 flow [2024-06-14 12:57:04,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8755, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9580, PETRI_PLACES=215, PETRI_TRANSITIONS=524} [2024-06-14 12:57:04,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 12:57:04,382 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 524 transitions, 9580 flow [2024-06-14 12:57:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:04,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:04,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:04,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:57:04,382 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:04,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash -883466290, now seen corresponding path program 10 times [2024-06-14 12:57:04,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:04,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988146609] [2024-06-14 12:57:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:04,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:05,536 INFO 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 12:57:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988146609] [2024-06-14 12:57:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988146609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:05,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:05,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:05,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707227577] [2024-06-14 12:57:05,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:05,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:05,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:05,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:05,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:05,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:05,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 524 transitions, 9580 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:05,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:05,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:05,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:07,311 INFO L124 PetriNetUnfolderBase]: 4778/7316 cut-off events. [2024-06-14 12:57:07,312 INFO L125 PetriNetUnfolderBase]: For 216042/216052 co-relation queries the response was YES. [2024-06-14 12:57:07,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55296 conditions, 7316 events. 4778/7316 cut-off events. For 216042/216052 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 42775 event pairs, 1224 based on Foata normal form. 44/7357 useless extension candidates. Maximal degree in co-relation 55192. Up to 5653 conditions per place. [2024-06-14 12:57:07,382 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 303 selfloop transitions, 272 changer transitions 0/578 dead transitions. [2024-06-14 12:57:07,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 578 transitions, 11216 flow [2024-06-14 12:57:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:57:07,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 12:57:07,384 INFO L175 Difference]: Start difference. First operand has 215 places, 524 transitions, 9580 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:57:07,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 578 transitions, 11216 flow [2024-06-14 12:57:07,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 578 transitions, 10527 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:07,965 INFO L231 Difference]: Finished difference. Result has 217 places, 531 transitions, 9629 flow [2024-06-14 12:57:07,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9629, PETRI_PLACES=217, PETRI_TRANSITIONS=531} [2024-06-14 12:57:07,966 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-14 12:57:07,966 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 531 transitions, 9629 flow [2024-06-14 12:57:07,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:07,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:07,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:07,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:57:07,967 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:07,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -318362660, now seen corresponding path program 11 times [2024-06-14 12:57:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:07,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033228835] [2024-06-14 12:57:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:09,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:09,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033228835] [2024-06-14 12:57:09,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033228835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:09,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:09,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:09,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938700873] [2024-06-14 12:57:09,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:09,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:09,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:09,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:09,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:09,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:09,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 531 transitions, 9629 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:09,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:09,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:09,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:11,118 INFO L124 PetriNetUnfolderBase]: 4895/7502 cut-off events. [2024-06-14 12:57:11,119 INFO L125 PetriNetUnfolderBase]: For 224297/224306 co-relation queries the response was YES. [2024-06-14 12:57:11,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56659 conditions, 7502 events. 4895/7502 cut-off events. For 224297/224306 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 44364 event pairs, 1620 based on Foata normal form. 33/7533 useless extension candidates. Maximal degree in co-relation 56554. Up to 7037 conditions per place. [2024-06-14 12:57:11,201 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 507 selfloop transitions, 78 changer transitions 0/588 dead transitions. [2024-06-14 12:57:11,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 588 transitions, 11208 flow [2024-06-14 12:57:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:57:11,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:57:11,202 INFO L175 Difference]: Start difference. First operand has 217 places, 531 transitions, 9629 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:57:11,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 588 transitions, 11208 flow [2024-06-14 12:57:11,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 588 transitions, 10657 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:11,826 INFO L231 Difference]: Finished difference. Result has 220 places, 544 transitions, 9514 flow [2024-06-14 12:57:11,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9078, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9514, PETRI_PLACES=220, PETRI_TRANSITIONS=544} [2024-06-14 12:57:11,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-14 12:57:11,827 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 544 transitions, 9514 flow [2024-06-14 12:57:11,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:11,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:11,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:11,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:57:11,828 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:11,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2138912760, now seen corresponding path program 2 times [2024-06-14 12:57:11,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:11,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003645172] [2024-06-14 12:57:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:11,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:13,037 INFO 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 12:57:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:13,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003645172] [2024-06-14 12:57:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003645172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:13,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:13,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963080446] [2024-06-14 12:57:13,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:13,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:13,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:13,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 544 transitions, 9514 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:13,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:13,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:13,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:14,788 INFO L124 PetriNetUnfolderBase]: 4912/7528 cut-off events. [2024-06-14 12:57:14,788 INFO L125 PetriNetUnfolderBase]: For 225183/225189 co-relation queries the response was YES. [2024-06-14 12:57:14,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57147 conditions, 7528 events. 4912/7528 cut-off events. For 225183/225189 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 44567 event pairs, 1606 based on Foata normal form. 6/7531 useless extension candidates. Maximal degree in co-relation 57040. Up to 7167 conditions per place. [2024-06-14 12:57:14,884 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 488 selfloop transitions, 86 changer transitions 0/577 dead transitions. [2024-06-14 12:57:14,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 577 transitions, 10844 flow [2024-06-14 12:57:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:57:14,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:57:14,885 INFO L175 Difference]: Start difference. First operand has 220 places, 544 transitions, 9514 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:57:14,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 577 transitions, 10844 flow [2024-06-14 12:57:15,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 577 transitions, 10701 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:15,516 INFO L231 Difference]: Finished difference. Result has 223 places, 546 transitions, 9592 flow [2024-06-14 12:57:15,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9371, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9592, PETRI_PLACES=223, PETRI_TRANSITIONS=546} [2024-06-14 12:57:15,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 12:57:15,516 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 546 transitions, 9592 flow [2024-06-14 12:57:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:15,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:15,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:57:15,517 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:15,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1598212762, now seen corresponding path program 3 times [2024-06-14 12:57:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:15,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324417261] [2024-06-14 12:57:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324417261] [2024-06-14 12:57:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324417261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:16,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:16,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263675538] [2024-06-14 12:57:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:16,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:16,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:16,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:16,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 546 transitions, 9592 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:16,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:16,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:16,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:18,237 INFO L124 PetriNetUnfolderBase]: 4929/7553 cut-off events. [2024-06-14 12:57:18,237 INFO L125 PetriNetUnfolderBase]: For 235171/235177 co-relation queries the response was YES. [2024-06-14 12:57:18,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57811 conditions, 7553 events. 4929/7553 cut-off events. For 235171/235177 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 44661 event pairs, 1573 based on Foata normal form. 6/7556 useless extension candidates. Maximal degree in co-relation 57702. Up to 7170 conditions per place. [2024-06-14 12:57:18,328 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 485 selfloop transitions, 86 changer transitions 0/574 dead transitions. [2024-06-14 12:57:18,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 574 transitions, 10890 flow [2024-06-14 12:57:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:57:18,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-14 12:57:18,329 INFO L175 Difference]: Start difference. First operand has 223 places, 546 transitions, 9592 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:57:18,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 574 transitions, 10890 flow [2024-06-14 12:57:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 574 transitions, 10703 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:19,006 INFO L231 Difference]: Finished difference. Result has 224 places, 548 transitions, 9635 flow [2024-06-14 12:57:19,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9405, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9635, PETRI_PLACES=224, PETRI_TRANSITIONS=548} [2024-06-14 12:57:19,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 12:57:19,009 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 548 transitions, 9635 flow [2024-06-14 12:57:19,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:19,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:19,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:57:19,010 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:19,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1445996036, now seen corresponding path program 4 times [2024-06-14 12:57:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890203988] [2024-06-14 12:57:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:20,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890203988] [2024-06-14 12:57:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890203988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:20,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051496006] [2024-06-14 12:57:20,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:20,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:20,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:20,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 548 transitions, 9635 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:20,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:20,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:20,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:21,831 INFO L124 PetriNetUnfolderBase]: 4946/7589 cut-off events. [2024-06-14 12:57:21,831 INFO L125 PetriNetUnfolderBase]: For 247655/247661 co-relation queries the response was YES. [2024-06-14 12:57:21,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58411 conditions, 7589 events. 4946/7589 cut-off events. For 247655/247661 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 44993 event pairs, 1978 based on Foata normal form. 8/7594 useless extension candidates. Maximal degree in co-relation 58301. Up to 7399 conditions per place. [2024-06-14 12:57:21,929 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 542 selfloop transitions, 27 changer transitions 0/572 dead transitions. [2024-06-14 12:57:21,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 572 transitions, 10913 flow [2024-06-14 12:57:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:57:21,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 12:57:21,930 INFO L175 Difference]: Start difference. First operand has 224 places, 548 transitions, 9635 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:57:21,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 572 transitions, 10913 flow [2024-06-14 12:57:22,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 572 transitions, 10719 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:22,672 INFO L231 Difference]: Finished difference. Result has 226 places, 550 transitions, 9548 flow [2024-06-14 12:57:22,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9445, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9548, PETRI_PLACES=226, PETRI_TRANSITIONS=550} [2024-06-14 12:57:22,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 12:57:22,673 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 550 transitions, 9548 flow [2024-06-14 12:57:22,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:22,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:22,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:22,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:57:22,674 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:22,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1361740732, now seen corresponding path program 5 times [2024-06-14 12:57:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:22,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805153096] [2024-06-14 12:57:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:23,654 INFO 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 12:57:23,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805153096] [2024-06-14 12:57:23,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805153096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:23,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:23,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:23,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320506616] [2024-06-14 12:57:23,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:23,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:23,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:23,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 550 transitions, 9548 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:23,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:23,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:23,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:25,314 INFO L124 PetriNetUnfolderBase]: 4963/7614 cut-off events. [2024-06-14 12:57:25,314 INFO L125 PetriNetUnfolderBase]: For 246066/246072 co-relation queries the response was YES. [2024-06-14 12:57:25,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58313 conditions, 7614 events. 4963/7614 cut-off events. For 246066/246072 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 45124 event pairs, 1962 based on Foata normal form. 8/7620 useless extension candidates. Maximal degree in co-relation 58202. Up to 7436 conditions per place. [2024-06-14 12:57:25,402 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 552 selfloop transitions, 17 changer transitions 0/572 dead transitions. [2024-06-14 12:57:25,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 572 transitions, 10800 flow [2024-06-14 12:57:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:57:25,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:25,403 INFO L175 Difference]: Start difference. First operand has 226 places, 550 transitions, 9548 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:57:25,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 572 transitions, 10800 flow [2024-06-14 12:57:26,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 572 transitions, 10719 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:26,099 INFO L231 Difference]: Finished difference. Result has 228 places, 552 transitions, 9552 flow [2024-06-14 12:57:26,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9467, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9552, PETRI_PLACES=228, PETRI_TRANSITIONS=552} [2024-06-14 12:57:26,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 12:57:26,101 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 552 transitions, 9552 flow [2024-06-14 12:57:26,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:26,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:26,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:26,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:57:26,102 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:26,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:26,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1598397460, now seen corresponding path program 12 times [2024-06-14 12:57:26,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:26,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351490086] [2024-06-14 12:57:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:27,238 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 12:57:27,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:27,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351490086] [2024-06-14 12:57:27,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351490086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:27,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:27,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008666214] [2024-06-14 12:57:27,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:27,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:27,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:27,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:27,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 552 transitions, 9552 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:27,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:27,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:27,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:29,085 INFO L124 PetriNetUnfolderBase]: 5145/7928 cut-off events. [2024-06-14 12:57:29,085 INFO L125 PetriNetUnfolderBase]: For 281381/281406 co-relation queries the response was YES. [2024-06-14 12:57:29,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60164 conditions, 7928 events. 5145/7928 cut-off events. For 281381/281406 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47499 event pairs, 1280 based on Foata normal form. 70/7995 useless extension candidates. Maximal degree in co-relation 60052. Up to 6841 conditions per place. [2024-06-14 12:57:29,180 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 426 selfloop transitions, 172 changer transitions 0/601 dead transitions. [2024-06-14 12:57:29,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 601 transitions, 11205 flow [2024-06-14 12:57:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:57:29,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:57:29,181 INFO L175 Difference]: Start difference. First operand has 228 places, 552 transitions, 9552 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:57:29,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 601 transitions, 11205 flow [2024-06-14 12:57:29,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 601 transitions, 11074 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:29,972 INFO L231 Difference]: Finished difference. Result has 231 places, 555 transitions, 9892 flow [2024-06-14 12:57:29,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9421, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9892, PETRI_PLACES=231, PETRI_TRANSITIONS=555} [2024-06-14 12:57:29,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-14 12:57:29,973 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 555 transitions, 9892 flow [2024-06-14 12:57:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:29,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:29,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:29,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:57:29,974 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:29,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1370081220, now seen corresponding path program 1 times [2024-06-14 12:57:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660071241] [2024-06-14 12:57:29,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:30,997 INFO 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 12:57:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660071241] [2024-06-14 12:57:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660071241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:30,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:30,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856827944] [2024-06-14 12:57:30,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:30,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:31,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:31,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 555 transitions, 9892 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:31,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:31,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:31,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:32,831 INFO L124 PetriNetUnfolderBase]: 5095/7838 cut-off events. [2024-06-14 12:57:32,831 INFO L125 PetriNetUnfolderBase]: For 263018/263024 co-relation queries the response was YES. [2024-06-14 12:57:32,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60152 conditions, 7838 events. 5095/7838 cut-off events. For 263018/263024 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 46953 event pairs, 2052 based on Foata normal form. 8/7844 useless extension candidates. Maximal degree in co-relation 60039. Up to 7599 conditions per place. [2024-06-14 12:57:32,927 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 524 selfloop transitions, 52 changer transitions 0/579 dead transitions. [2024-06-14 12:57:32,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 579 transitions, 11167 flow [2024-06-14 12:57:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:57:32,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:57:32,929 INFO L175 Difference]: Start difference. First operand has 231 places, 555 transitions, 9892 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:57:32,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 579 transitions, 11167 flow [2024-06-14 12:57:33,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 579 transitions, 10810 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:33,668 INFO L231 Difference]: Finished difference. Result has 233 places, 555 transitions, 9671 flow [2024-06-14 12:57:33,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9535, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9671, PETRI_PLACES=233, PETRI_TRANSITIONS=555} [2024-06-14 12:57:33,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 12:57:33,669 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 555 transitions, 9671 flow [2024-06-14 12:57:33,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:33,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:33,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:57:33,670 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:33,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1591726012, now seen corresponding path program 6 times [2024-06-14 12:57:33,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281043139] [2024-06-14 12:57:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:34,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:34,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281043139] [2024-06-14 12:57:34,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281043139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:34,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:34,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:34,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820646417] [2024-06-14 12:57:34,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:34,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:34,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:34,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:34,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 555 transitions, 9671 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:34,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:34,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:34,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:36,507 INFO L124 PetriNetUnfolderBase]: 5087/7828 cut-off events. [2024-06-14 12:57:36,507 INFO L125 PetriNetUnfolderBase]: For 266461/266467 co-relation queries the response was YES. [2024-06-14 12:57:36,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59503 conditions, 7828 events. 5087/7828 cut-off events. For 266461/266467 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 46875 event pairs, 2052 based on Foata normal form. 8/7834 useless extension candidates. Maximal degree in co-relation 59389. Up to 7606 conditions per place. [2024-06-14 12:57:36,607 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 542 selfloop transitions, 34 changer transitions 0/579 dead transitions. [2024-06-14 12:57:36,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 579 transitions, 10967 flow [2024-06-14 12:57:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:57:36,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 12:57:36,608 INFO L175 Difference]: Start difference. First operand has 233 places, 555 transitions, 9671 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:57:36,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 579 transitions, 10967 flow [2024-06-14 12:57:37,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 579 transitions, 10791 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:37,390 INFO L231 Difference]: Finished difference. Result has 233 places, 557 transitions, 9624 flow [2024-06-14 12:57:37,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9495, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9624, PETRI_PLACES=233, PETRI_TRANSITIONS=557} [2024-06-14 12:57:37,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 12:57:37,391 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 557 transitions, 9624 flow [2024-06-14 12:57:37,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:37,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:37,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:37,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:57:37,392 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:37,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash -94013436, now seen corresponding path program 1 times [2024-06-14 12:57:37,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:37,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539001159] [2024-06-14 12:57:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:37,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:38,344 INFO 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 12:57:38,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539001159] [2024-06-14 12:57:38,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539001159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:38,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:38,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:57:38,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344924669] [2024-06-14 12:57:38,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:57:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:38,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:57:38,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:57:38,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:57:38,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 557 transitions, 9624 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:38,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:38,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:57:38,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:39,920 INFO L124 PetriNetUnfolderBase]: 4893/7557 cut-off events. [2024-06-14 12:57:39,921 INFO L125 PetriNetUnfolderBase]: For 260012/260245 co-relation queries the response was YES. [2024-06-14 12:57:39,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57755 conditions, 7557 events. 4893/7557 cut-off events. For 260012/260245 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 45476 event pairs, 1579 based on Foata normal form. 172/7667 useless extension candidates. Maximal degree in co-relation 57642. Up to 7245 conditions per place. [2024-06-14 12:57:40,017 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 516 selfloop transitions, 34 changer transitions 0/577 dead transitions. [2024-06-14 12:57:40,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 577 transitions, 10850 flow [2024-06-14 12:57:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:57:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:57:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-14 12:57:40,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-14 12:57:40,019 INFO L175 Difference]: Start difference. First operand has 233 places, 557 transitions, 9624 flow. Second operand 5 states and 94 transitions. [2024-06-14 12:57:40,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 577 transitions, 10850 flow [2024-06-14 12:57:40,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 577 transitions, 10764 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:40,720 INFO L231 Difference]: Finished difference. Result has 234 places, 560 transitions, 9687 flow [2024-06-14 12:57:40,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9540, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9687, PETRI_PLACES=234, PETRI_TRANSITIONS=560} [2024-06-14 12:57:40,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 12:57:40,721 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 560 transitions, 9687 flow [2024-06-14 12:57:40,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:40,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:40,721 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 12:57:40,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:57:40,722 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:40,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:40,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1501726208, now seen corresponding path program 1 times [2024-06-14 12:57:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:40,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282371633] [2024-06-14 12:57:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:40,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:41,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282371633] [2024-06-14 12:57:41,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282371633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:41,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:41,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:41,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102866487] [2024-06-14 12:57:41,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:41,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:41,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:41,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:41,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 560 transitions, 9687 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:41,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:41,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:41,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:43,710 INFO L124 PetriNetUnfolderBase]: 5754/8967 cut-off events. [2024-06-14 12:57:43,710 INFO L125 PetriNetUnfolderBase]: For 298474/298497 co-relation queries the response was YES. [2024-06-14 12:57:43,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66704 conditions, 8967 events. 5754/8967 cut-off events. For 298474/298497 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 56144 event pairs, 1011 based on Foata normal form. 34/8998 useless extension candidates. Maximal degree in co-relation 66590. Up to 3605 conditions per place. [2024-06-14 12:57:43,820 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 245 selfloop transitions, 381 changer transitions 0/629 dead transitions. [2024-06-14 12:57:43,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 629 transitions, 11697 flow [2024-06-14 12:57:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:57:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:57:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 12:57:43,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-14 12:57:43,822 INFO L175 Difference]: Start difference. First operand has 234 places, 560 transitions, 9687 flow. Second operand 10 states and 186 transitions. [2024-06-14 12:57:43,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 629 transitions, 11697 flow [2024-06-14 12:57:44,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 629 transitions, 11644 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:44,766 INFO L231 Difference]: Finished difference. Result has 242 places, 573 transitions, 10852 flow [2024-06-14 12:57:44,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9634, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10852, PETRI_PLACES=242, PETRI_TRANSITIONS=573} [2024-06-14 12:57:44,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 12:57:44,767 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 573 transitions, 10852 flow [2024-06-14 12:57:44,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:44,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:44,767 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 12:57:44,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:57:44,767 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:44,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash 445874326, now seen corresponding path program 2 times [2024-06-14 12:57:44,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:44,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064612520] [2024-06-14 12:57:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:45,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:45,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064612520] [2024-06-14 12:57:45,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064612520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:45,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:45,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:45,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9094598] [2024-06-14 12:57:45,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:45,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:45,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:45,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 573 transitions, 10852 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:45,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:45,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:45,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:48,243 INFO L124 PetriNetUnfolderBase]: 6505/10135 cut-off events. [2024-06-14 12:57:48,243 INFO L125 PetriNetUnfolderBase]: For 393353/393376 co-relation queries the response was YES. [2024-06-14 12:57:48,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79538 conditions, 10135 events. 6505/10135 cut-off events. For 393353/393376 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 64684 event pairs, 1477 based on Foata normal form. 42/10174 useless extension candidates. Maximal degree in co-relation 79422. Up to 6418 conditions per place. [2024-06-14 12:57:48,350 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 313 selfloop transitions, 366 changer transitions 0/682 dead transitions. [2024-06-14 12:57:48,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 682 transitions, 13646 flow [2024-06-14 12:57:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:57:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:57:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 12:57:48,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:57:48,351 INFO L175 Difference]: Start difference. First operand has 242 places, 573 transitions, 10852 flow. Second operand 10 states and 185 transitions. [2024-06-14 12:57:48,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 682 transitions, 13646 flow [2024-06-14 12:57:49,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 682 transitions, 13211 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:49,166 INFO L231 Difference]: Finished difference. Result has 249 places, 611 transitions, 12125 flow [2024-06-14 12:57:49,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10482, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12125, PETRI_PLACES=249, PETRI_TRANSITIONS=611} [2024-06-14 12:57:49,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 12:57:49,167 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 611 transitions, 12125 flow [2024-06-14 12:57:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:49,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:49,167 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 12:57:49,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:57:49,167 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:49,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash 447748276, now seen corresponding path program 3 times [2024-06-14 12:57:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:49,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498020421] [2024-06-14 12:57:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:49,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:49,982 INFO 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 12:57:49,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:49,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498020421] [2024-06-14 12:57:49,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498020421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:49,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:49,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921770038] [2024-06-14 12:57:49,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:49,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:49,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:49,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:49,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:50,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:50,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 611 transitions, 12125 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:50,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:50,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:50,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:52,784 INFO L124 PetriNetUnfolderBase]: 6989/10924 cut-off events. [2024-06-14 12:57:52,784 INFO L125 PetriNetUnfolderBase]: For 468332/468355 co-relation queries the response was YES. [2024-06-14 12:57:52,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88730 conditions, 10924 events. 6989/10924 cut-off events. For 468332/468355 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 71088 event pairs, 1696 based on Foata normal form. 50/10971 useless extension candidates. Maximal degree in co-relation 88610. Up to 8046 conditions per place. [2024-06-14 12:57:52,922 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 336 selfloop transitions, 349 changer transitions 0/688 dead transitions. [2024-06-14 12:57:52,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 688 transitions, 14385 flow [2024-06-14 12:57:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:57:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:57:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 12:57:52,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-14 12:57:52,924 INFO L175 Difference]: Start difference. First operand has 249 places, 611 transitions, 12125 flow. Second operand 10 states and 186 transitions. [2024-06-14 12:57:52,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 688 transitions, 14385 flow [2024-06-14 12:57:53,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 688 transitions, 14316 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:53,918 INFO L231 Difference]: Finished difference. Result has 256 places, 618 transitions, 12989 flow [2024-06-14 12:57:53,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12056, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12989, PETRI_PLACES=256, PETRI_TRANSITIONS=618} [2024-06-14 12:57:53,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 12:57:53,919 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 618 transitions, 12989 flow [2024-06-14 12:57:53,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:53,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:53,920 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 12:57:53,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:57:53,920 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:53,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash 447751996, now seen corresponding path program 4 times [2024-06-14 12:57:53,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:53,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358473014] [2024-06-14 12:57:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:53,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:54,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358473014] [2024-06-14 12:57:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358473014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:54,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:54,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:54,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363224746] [2024-06-14 12:57:54,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:54,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:54,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:54,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 618 transitions, 12989 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:54,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:54,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:54,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:57,603 INFO L124 PetriNetUnfolderBase]: 7057/11058 cut-off events. [2024-06-14 12:57:57,603 INFO L125 PetriNetUnfolderBase]: For 492268/492291 co-relation queries the response was YES. [2024-06-14 12:57:57,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90428 conditions, 11058 events. 7057/11058 cut-off events. For 492268/492291 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 72724 event pairs, 1833 based on Foata normal form. 66/11121 useless extension candidates. Maximal degree in co-relation 90306. Up to 8995 conditions per place. [2024-06-14 12:57:58,036 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 349 selfloop transitions, 334 changer transitions 0/686 dead transitions. [2024-06-14 12:57:58,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 686 transitions, 14975 flow [2024-06-14 12:57:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:57:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:57:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:57:58,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-14 12:57:58,040 INFO L175 Difference]: Start difference. First operand has 256 places, 618 transitions, 12989 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:57:58,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 686 transitions, 14975 flow [2024-06-14 12:57:59,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 686 transitions, 14584 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:59,077 INFO L231 Difference]: Finished difference. Result has 262 places, 624 transitions, 13476 flow [2024-06-14 12:57:59,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12598, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13476, PETRI_PLACES=262, PETRI_TRANSITIONS=624} [2024-06-14 12:57:59,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-14 12:57:59,078 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 624 transitions, 13476 flow [2024-06-14 12:57:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:59,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:59,078 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 12:57:59,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:57:59,078 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:59,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1411495826, now seen corresponding path program 1 times [2024-06-14 12:57:59,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:59,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285226395] [2024-06-14 12:57:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:59,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:00,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285226395] [2024-06-14 12:58:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285226395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:00,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:58:00,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095165660] [2024-06-14 12:58:00,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:00,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:58:00,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:58:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:58:00,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:00,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 624 transitions, 13476 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:00,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:00,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:00,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:03,131 INFO L124 PetriNetUnfolderBase]: 7096/11142 cut-off events. [2024-06-14 12:58:03,132 INFO L125 PetriNetUnfolderBase]: For 477239/477245 co-relation queries the response was YES. [2024-06-14 12:58:03,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92679 conditions, 11142 events. 7096/11142 cut-off events. For 477239/477245 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 73740 event pairs, 2567 based on Foata normal form. 10/11149 useless extension candidates. Maximal degree in co-relation 92554. Up to 10470 conditions per place. [2024-06-14 12:58:03,277 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 539 selfloop transitions, 134 changer transitions 0/676 dead transitions. [2024-06-14 12:58:03,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 676 transitions, 15158 flow [2024-06-14 12:58:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:58:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:58:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-14 12:58:03,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:58:03,279 INFO L175 Difference]: Start difference. First operand has 262 places, 624 transitions, 13476 flow. Second operand 12 states and 200 transitions. [2024-06-14 12:58:03,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 676 transitions, 15158 flow [2024-06-14 12:58:04,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 676 transitions, 14668 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:04,573 INFO L231 Difference]: Finished difference. Result has 268 places, 628 transitions, 13385 flow [2024-06-14 12:58:04,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12986, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13385, PETRI_PLACES=268, PETRI_TRANSITIONS=628} [2024-06-14 12:58:04,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 12:58:04,574 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 628 transitions, 13385 flow [2024-06-14 12:58:04,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:04,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:04,574 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 12:58:04,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:58:04,574 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:04,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:04,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2020426978, now seen corresponding path program 2 times [2024-06-14 12:58:04,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:04,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045294882] [2024-06-14 12:58:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:04,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:05,688 INFO 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 12:58:05,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:05,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045294882] [2024-06-14 12:58:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045294882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:05,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:05,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:58:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160262866] [2024-06-14 12:58:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:05,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:58:05,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:58:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:58:05,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:05,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 628 transitions, 13385 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:05,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:05,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:05,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:08,989 INFO L124 PetriNetUnfolderBase]: 7384/11601 cut-off events. [2024-06-14 12:58:08,989 INFO L125 PetriNetUnfolderBase]: For 533087/533093 co-relation queries the response was YES. [2024-06-14 12:58:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97192 conditions, 11601 events. 7384/11601 cut-off events. For 533087/533093 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 77428 event pairs, 2639 based on Foata normal form. 6/11604 useless extension candidates. Maximal degree in co-relation 97066. Up to 10484 conditions per place. [2024-06-14 12:58:09,162 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 544 selfloop transitions, 142 changer transitions 0/689 dead transitions. [2024-06-14 12:58:09,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 689 transitions, 15349 flow [2024-06-14 12:58:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:58:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:58:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-14 12:58:09,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-14 12:58:09,164 INFO L175 Difference]: Start difference. First operand has 268 places, 628 transitions, 13385 flow. Second operand 12 states and 206 transitions. [2024-06-14 12:58:09,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 689 transitions, 15349 flow [2024-06-14 12:58:10,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 689 transitions, 15010 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-14 12:58:10,757 INFO L231 Difference]: Finished difference. Result has 271 places, 634 transitions, 13533 flow [2024-06-14 12:58:10,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13046, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13533, PETRI_PLACES=271, PETRI_TRANSITIONS=634} [2024-06-14 12:58:10,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 12:58:10,758 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 634 transitions, 13533 flow [2024-06-14 12:58:10,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:10,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:10,759 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 12:58:10,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:58:10,759 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:10,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1081110060, now seen corresponding path program 3 times [2024-06-14 12:58:10,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:10,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853932596] [2024-06-14 12:58:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:10,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:11,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853932596] [2024-06-14 12:58:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853932596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:11,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:11,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:58:11,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213195662] [2024-06-14 12:58:11,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:11,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:58:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:58:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:58:11,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:11,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 634 transitions, 13533 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:11,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:11,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:11,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:14,838 INFO L124 PetriNetUnfolderBase]: 7284/11457 cut-off events. [2024-06-14 12:58:14,838 INFO L125 PetriNetUnfolderBase]: For 547510/547516 co-relation queries the response was YES. [2024-06-14 12:58:14,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94753 conditions, 11457 events. 7284/11457 cut-off events. For 547510/547516 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 76400 event pairs, 2613 based on Foata normal form. 50/11504 useless extension candidates. Maximal degree in co-relation 94625. Up to 10522 conditions per place. [2024-06-14 12:58:15,027 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 544 selfloop transitions, 130 changer transitions 0/677 dead transitions. [2024-06-14 12:58:15,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 677 transitions, 15095 flow [2024-06-14 12:58:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:58:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:58:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:58:15,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 12:58:15,029 INFO L175 Difference]: Start difference. First operand has 271 places, 634 transitions, 13533 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:58:15,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 677 transitions, 15095 flow [2024-06-14 12:58:16,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 677 transitions, 14856 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:16,639 INFO L231 Difference]: Finished difference. Result has 273 places, 634 transitions, 13571 flow [2024-06-14 12:58:16,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13294, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13571, PETRI_PLACES=273, PETRI_TRANSITIONS=634} [2024-06-14 12:58:16,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 12:58:16,640 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 634 transitions, 13571 flow [2024-06-14 12:58:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:16,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:16,640 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 12:58:16,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:58:16,640 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:16,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash -186500940, now seen corresponding path program 5 times [2024-06-14 12:58:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701196016] [2024-06-14 12:58:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:17,500 INFO 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 12:58:17,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:17,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701196016] [2024-06-14 12:58:17,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701196016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:17,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:17,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:17,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386215907] [2024-06-14 12:58:17,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:17,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:17,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:17,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:17,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:17,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 634 transitions, 13571 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:17,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:17,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:17,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:20,724 INFO L124 PetriNetUnfolderBase]: 7376/11611 cut-off events. [2024-06-14 12:58:20,724 INFO L125 PetriNetUnfolderBase]: For 544946/544952 co-relation queries the response was YES. [2024-06-14 12:58:20,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95972 conditions, 11611 events. 7376/11611 cut-off events. For 544946/544952 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 77622 event pairs, 2569 based on Foata normal form. 34/11642 useless extension candidates. Maximal degree in co-relation 95842. Up to 9933 conditions per place. [2024-06-14 12:58:20,870 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 544 selfloop transitions, 140 changer transitions 0/687 dead transitions. [2024-06-14 12:58:20,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 687 transitions, 15509 flow [2024-06-14 12:58:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:58:20,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:58:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:58:20,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-14 12:58:20,872 INFO L175 Difference]: Start difference. First operand has 273 places, 634 transitions, 13571 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:58:20,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 687 transitions, 15509 flow [2024-06-14 12:58:22,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 687 transitions, 15277 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:22,251 INFO L231 Difference]: Finished difference. Result has 276 places, 638 transitions, 13784 flow [2024-06-14 12:58:22,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13339, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13784, PETRI_PLACES=276, PETRI_TRANSITIONS=638} [2024-06-14 12:58:22,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-14 12:58:22,253 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 638 transitions, 13784 flow [2024-06-14 12:58:22,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:22,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:22,253 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 12:58:22,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:58:22,253 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:22,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash -646931136, now seen corresponding path program 6 times [2024-06-14 12:58:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:22,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287437531] [2024-06-14 12:58:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:22,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:23,306 INFO 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 12:58:23,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:23,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287437531] [2024-06-14 12:58:23,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287437531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:23,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:23,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:23,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130749785] [2024-06-14 12:58:23,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:23,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:23,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:23,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:23,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 638 transitions, 13784 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:23,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:23,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:23,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:26,252 INFO L124 PetriNetUnfolderBase]: 7472/11750 cut-off events. [2024-06-14 12:58:26,252 INFO L125 PetriNetUnfolderBase]: For 557183/557206 co-relation queries the response was YES. [2024-06-14 12:58:26,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97320 conditions, 11750 events. 7472/11750 cut-off events. For 557183/557206 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 78336 event pairs, 1738 based on Foata normal form. 42/11789 useless extension candidates. Maximal degree in co-relation 97189. Up to 4966 conditions per place. [2024-06-14 12:58:26,424 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 446 changer transitions 0/687 dead transitions. [2024-06-14 12:58:26,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 687 transitions, 15613 flow [2024-06-14 12:58:26,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:58:26,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:58:26,425 INFO L175 Difference]: Start difference. First operand has 276 places, 638 transitions, 13784 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:58:26,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 687 transitions, 15613 flow [2024-06-14 12:58:27,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 687 transitions, 15380 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:27,958 INFO L231 Difference]: Finished difference. Result has 278 places, 640 transitions, 14528 flow [2024-06-14 12:58:27,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13551, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14528, PETRI_PLACES=278, PETRI_TRANSITIONS=640} [2024-06-14 12:58:27,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 12:58:27,959 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 640 transitions, 14528 flow [2024-06-14 12:58:27,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:27,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:27,959 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 12:58:27,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:58:27,960 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:27,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1253257356, now seen corresponding path program 7 times [2024-06-14 12:58:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:27,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040495576] [2024-06-14 12:58:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:28,934 INFO 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 12:58:28,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:28,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040495576] [2024-06-14 12:58:28,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040495576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:28,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:28,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069691640] [2024-06-14 12:58:28,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:28,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:29,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:29,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 640 transitions, 14528 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:29,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:29,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:29,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:31,952 INFO L124 PetriNetUnfolderBase]: 7808/12360 cut-off events. [2024-06-14 12:58:31,952 INFO L125 PetriNetUnfolderBase]: For 627839/627862 co-relation queries the response was YES. [2024-06-14 12:58:32,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103525 conditions, 12360 events. 7808/12360 cut-off events. For 627839/627862 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 84501 event pairs, 2279 based on Foata normal form. 66/12423 useless extension candidates. Maximal degree in co-relation 103392. Up to 9743 conditions per place. [2024-06-14 12:58:32,161 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 335 selfloop transitions, 354 changer transitions 0/692 dead transitions. [2024-06-14 12:58:32,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 692 transitions, 16319 flow [2024-06-14 12:58:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:58:32,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 12:58:32,164 INFO L175 Difference]: Start difference. First operand has 278 places, 640 transitions, 14528 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:58:32,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 692 transitions, 16319 flow [2024-06-14 12:58:33,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 692 transitions, 15612 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:33,934 INFO L231 Difference]: Finished difference. Result has 280 places, 646 transitions, 14737 flow [2024-06-14 12:58:33,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13826, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14737, PETRI_PLACES=280, PETRI_TRANSITIONS=646} [2024-06-14 12:58:33,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-14 12:58:33,935 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 646 transitions, 14737 flow [2024-06-14 12:58:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:33,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:33,935 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 12:58:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:58:33,936 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:33,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1253261076, now seen corresponding path program 8 times [2024-06-14 12:58:33,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:33,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200243449] [2024-06-14 12:58:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:33,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:34,869 INFO 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 12:58:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200243449] [2024-06-14 12:58:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200243449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:34,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:34,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17276370] [2024-06-14 12:58:34,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:34,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:34,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:34,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:34,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:34,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:34,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 646 transitions, 14737 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:34,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:34,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:34,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:38,341 INFO L124 PetriNetUnfolderBase]: 8123/12863 cut-off events. [2024-06-14 12:58:38,341 INFO L125 PetriNetUnfolderBase]: For 628503/628526 co-relation queries the response was YES. [2024-06-14 12:58:38,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107257 conditions, 12863 events. 8123/12863 cut-off events. For 628503/628526 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 88483 event pairs, 2282 based on Foata normal form. 50/12910 useless extension candidates. Maximal degree in co-relation 107124. Up to 8118 conditions per place. [2024-06-14 12:58:38,537 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 305 selfloop transitions, 395 changer transitions 0/703 dead transitions. [2024-06-14 12:58:38,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 703 transitions, 16814 flow [2024-06-14 12:58:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:38,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:58:38,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-14 12:58:38,538 INFO L175 Difference]: Start difference. First operand has 280 places, 646 transitions, 14737 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:58:38,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 703 transitions, 16814 flow [2024-06-14 12:58:40,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 703 transitions, 16080 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:40,630 INFO L231 Difference]: Finished difference. Result has 282 places, 654 transitions, 15075 flow [2024-06-14 12:58:40,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14003, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15075, PETRI_PLACES=282, PETRI_TRANSITIONS=654} [2024-06-14 12:58:40,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 12:58:40,631 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 654 transitions, 15075 flow [2024-06-14 12:58:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:40,631 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 12:58:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:58:40,631 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:40,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1881994090, now seen corresponding path program 4 times [2024-06-14 12:58:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835711133] [2024-06-14 12:58:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:42,111 INFO 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 12:58:42,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:42,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835711133] [2024-06-14 12:58:42,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835711133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:42,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:42,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:58:42,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736902438] [2024-06-14 12:58:42,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:42,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:58:42,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:42,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:58:42,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:58:42,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:42,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 654 transitions, 15075 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:42,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:42,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:42,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:46,094 INFO L124 PetriNetUnfolderBase]: 8173/12983 cut-off events. [2024-06-14 12:58:46,094 INFO L125 PetriNetUnfolderBase]: For 633251/633257 co-relation queries the response was YES. [2024-06-14 12:58:46,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108428 conditions, 12983 events. 8173/12983 cut-off events. For 633251/633257 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 90407 event pairs, 3142 based on Foata normal form. 12/12992 useless extension candidates. Maximal degree in co-relation 108294. Up to 11953 conditions per place. [2024-06-14 12:58:46,409 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 511 selfloop transitions, 199 changer transitions 0/713 dead transitions. [2024-06-14 12:58:46,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 713 transitions, 16992 flow [2024-06-14 12:58:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:58:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:58:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 12:58:46,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-14 12:58:46,413 INFO L175 Difference]: Start difference. First operand has 282 places, 654 transitions, 15075 flow. Second operand 11 states and 182 transitions. [2024-06-14 12:58:46,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 713 transitions, 16992 flow [2024-06-14 12:58:48,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 713 transitions, 16551 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:48,121 INFO L231 Difference]: Finished difference. Result has 287 places, 659 transitions, 15230 flow [2024-06-14 12:58:48,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14634, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15230, PETRI_PLACES=287, PETRI_TRANSITIONS=659} [2024-06-14 12:58:48,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-14 12:58:48,121 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 659 transitions, 15230 flow [2024-06-14 12:58:48,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:48,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:48,122 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 12:58:48,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:58:48,122 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:48,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1887510292, now seen corresponding path program 9 times [2024-06-14 12:58:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:48,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303903293] [2024-06-14 12:58:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:49,294 INFO 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 12:58:49,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:49,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303903293] [2024-06-14 12:58:49,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303903293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:49,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:49,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:49,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198823178] [2024-06-14 12:58:49,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:49,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:49,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:49,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:49,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 659 transitions, 15230 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:49,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:49,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:49,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:53,611 INFO L124 PetriNetUnfolderBase]: 8745/13876 cut-off events. [2024-06-14 12:58:53,611 INFO L125 PetriNetUnfolderBase]: For 748787/748793 co-relation queries the response was YES. [2024-06-14 12:58:53,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118675 conditions, 13876 events. 8745/13876 cut-off events. For 748787/748793 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 97148 event pairs, 3177 based on Foata normal form. 42/13915 useless extension candidates. Maximal degree in co-relation 118540. Up to 10508 conditions per place. [2024-06-14 12:58:53,813 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 502 selfloop transitions, 212 changer transitions 0/717 dead transitions. [2024-06-14 12:58:53,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 717 transitions, 17444 flow [2024-06-14 12:58:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:58:53,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:58:53,815 INFO L175 Difference]: Start difference. First operand has 287 places, 659 transitions, 15230 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:58:53,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 717 transitions, 17444 flow [2024-06-14 12:58:55,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 717 transitions, 16951 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-14 12:58:55,840 INFO L231 Difference]: Finished difference. Result has 287 places, 667 transitions, 15503 flow [2024-06-14 12:58:55,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14737, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15503, PETRI_PLACES=287, PETRI_TRANSITIONS=667} [2024-06-14 12:58:55,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-14 12:58:55,890 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 667 transitions, 15503 flow [2024-06-14 12:58:55,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:55,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:55,890 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 12:58:55,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:58:55,890 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:55,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:55,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1726971174, now seen corresponding path program 5 times [2024-06-14 12:58:55,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:55,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679003162] [2024-06-14 12:58:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:55,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:57,176 INFO 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 12:58:57,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:57,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679003162] [2024-06-14 12:58:57,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679003162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:58:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111319795] [2024-06-14 12:58:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:58:57,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:58:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:58:57,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:57,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 667 transitions, 15503 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:58:57,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:57,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:57,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:01,771 INFO L124 PetriNetUnfolderBase]: 8943/14215 cut-off events. [2024-06-14 12:59:01,771 INFO L125 PetriNetUnfolderBase]: For 786100/786106 co-relation queries the response was YES. [2024-06-14 12:59:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123466 conditions, 14215 events. 8943/14215 cut-off events. For 786100/786106 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 100526 event pairs, 3399 based on Foata normal form. 6/14218 useless extension candidates. Maximal degree in co-relation 123330. Up to 12309 conditions per place. [2024-06-14 12:59:01,963 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 513 selfloop transitions, 216 changer transitions 0/732 dead transitions. [2024-06-14 12:59:01,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 732 transitions, 17717 flow [2024-06-14 12:59:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:59:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:59:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 12:59:01,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-14 12:59:01,969 INFO L175 Difference]: Start difference. First operand has 287 places, 667 transitions, 15503 flow. Second operand 11 states and 188 transitions. [2024-06-14 12:59:01,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 732 transitions, 17717 flow [2024-06-14 12:59:04,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 732 transitions, 17417 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:04,011 INFO L231 Difference]: Finished difference. Result has 293 places, 674 transitions, 15950 flow [2024-06-14 12:59:04,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15215, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15950, PETRI_PLACES=293, PETRI_TRANSITIONS=674} [2024-06-14 12:59:04,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-14 12:59:04,011 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 674 transitions, 15950 flow [2024-06-14 12:59:04,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:59:04,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:04,012 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 12:59:04,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:59:04,012 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:04,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1882000042, now seen corresponding path program 10 times [2024-06-14 12:59:04,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:04,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178237677] [2024-06-14 12:59:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:04,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:05,295 INFO 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 12:59:05,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:05,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178237677] [2024-06-14 12:59:05,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178237677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:05,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:05,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:59:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764220075] [2024-06-14 12:59:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:05,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:59:05,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:05,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:59:05,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:59:05,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:05,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 674 transitions, 15950 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:59:05,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:05,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:05,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:10,262 INFO L124 PetriNetUnfolderBase]: 9420/15009 cut-off events. [2024-06-14 12:59:10,262 INFO L125 PetriNetUnfolderBase]: For 853141/853147 co-relation queries the response was YES. [2024-06-14 12:59:10,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130283 conditions, 15009 events. 9420/15009 cut-off events. For 853141/853147 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 107678 event pairs, 3648 based on Foata normal form. 60/15066 useless extension candidates. Maximal degree in co-relation 130145. Up to 13273 conditions per place. [2024-06-14 12:59:10,478 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 535 selfloop transitions, 225 changer transitions 0/763 dead transitions. [2024-06-14 12:59:10,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 763 transitions, 18715 flow [2024-06-14 12:59:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:59:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:59:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-14 12:59:10,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:59:10,479 INFO L175 Difference]: Start difference. First operand has 293 places, 674 transitions, 15950 flow. Second operand 12 states and 201 transitions. [2024-06-14 12:59:10,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 763 transitions, 18715 flow [2024-06-14 12:59:12,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 763 transitions, 18398 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:59:12,623 INFO L231 Difference]: Finished difference. Result has 298 places, 699 transitions, 16989 flow [2024-06-14 12:59:12,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15651, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16989, PETRI_PLACES=298, PETRI_TRANSITIONS=699} [2024-06-14 12:59:12,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-14 12:59:12,623 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 699 transitions, 16989 flow [2024-06-14 12:59:12,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 12:59:12,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:12,624 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 12:59:12,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:59:12,624 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:12,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1887506572, now seen corresponding path program 11 times [2024-06-14 12:59:12,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:12,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515546504] [2024-06-14 12:59:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:12,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat