./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:57:22,318 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:57:22,402 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:57:22,418 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:57:22,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:57:22,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:57:22,449 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:57:22,449 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:57:22,450 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:57:22,454 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:57:22,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:57:22,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:57:22,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:57:22,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:57:22,457 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:57:22,457 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:57:22,458 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:57:22,458 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:57:22,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:57:22,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:57:22,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:57:22,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:57:22,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:57:22,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:57:22,460 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:57:22,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:57:22,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:57:22,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:57:22,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:57:22,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:57:22,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:57:22,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:57:22,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:57:22,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:57:22,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:57:22,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:57:22,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:57:22,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:57:22,466 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:57:22,466 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:57:22,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:57:22,467 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:57:22,467 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:57:22,467 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:57:22,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:57:22,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:57:22,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:57:22,752 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:57:22,752 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:57:22,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:57:24,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:57:24,250 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:57:24,251 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:57:24,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3937565dc/cdd43c22adc24730ad05444d4f12628b/FLAG86c37bf12 [2024-06-21 20:57:24,282 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3937565dc/cdd43c22adc24730ad05444d4f12628b [2024-06-21 20:57:24,284 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:57:24,284 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:57:24,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 20:57:24,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:57:24,498 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:57:24,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:57:24,500 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:57:24,505 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:57:24,506 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:57:24" (1/2) ... [2024-06-21 20:57:24,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9201d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:24, skipping insertion in model container [2024-06-21 20:57:24,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:57:24" (1/2) ... [2024-06-21 20:57:24,510 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30ab8731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:57:24, skipping insertion in model container [2024-06-21 20:57:24,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:24" (2/2) ... [2024-06-21 20:57:24,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9201d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:24, skipping insertion in model container [2024-06-21 20:57:24,511 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:24" (2/2) ... [2024-06-21 20:57:24,511 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:57:24,620 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:57:24,622 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || b$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1)) [2024-06-21 20:57:24,622 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || b$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1)) [2024-06-21 20:57:24,622 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || b$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1)) [2024-06-21 20:57:24,624 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:57:24,624 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 20:57:24,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:57:25,023 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:57:25,037 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:57:25,213 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:57:25,258 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:57:25,259 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25 WrapperNode [2024-06-21 20:57:25,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:57:25,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:57:25,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:57:25,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:57:25,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,308 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,349 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 129 [2024-06-21 20:57:25,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:57:25,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:57:25,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:57:25,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:57:25,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,371 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,394 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:57:25,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,443 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,445 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,447 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,449 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:57:25,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:57:25,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:57:25,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:57:25,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (1/1) ... [2024-06-21 20:57:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:57:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:57:25,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:57:25,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:57:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:57:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:57:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:57:25,549 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:57:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:57:25,549 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:57:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:57:25,550 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:57:25,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:57:25,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:57:25,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:57:25,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:57:25,551 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:57:25,673 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:57:25,675 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:57:26,050 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:57:26,051 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:57:26,200 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:57:26,200 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:57:26,201 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:57:26 BoogieIcfgContainer [2024-06-21 20:57:26,201 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:57:26,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:57:26,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:57:26,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:57:26,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:57:24" (1/4) ... [2024-06-21 20:57:26,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfb1472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:57:26, skipping insertion in model container [2024-06-21 20:57:26,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:57:24" (2/4) ... [2024-06-21 20:57:26,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfb1472 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:57:26, skipping insertion in model container [2024-06-21 20:57:26,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:57:25" (3/4) ... [2024-06-21 20:57:26,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfb1472 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:57:26, skipping insertion in model container [2024-06-21 20:57:26,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:57:26" (4/4) ... [2024-06-21 20:57:26,210 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:57:26,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:57:26,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:57:26,227 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:57:26,309 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:57:26,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:57:26,380 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-21 20:57:26,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:57:26,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:57:26,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:57:26,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-21 20:57:26,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:57:26,402 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;@518da30a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:57:26,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:57:26,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:57:26,406 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:57:26,407 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:57:26,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:26,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:57:26,408 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)] === [2024-06-21 20:57:26,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash 386398261, now seen corresponding path program 1 times [2024-06-21 20:57:26,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:26,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006108364] [2024-06-21 20:57:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:26,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:27,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:27,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006108364] [2024-06-21 20:57:27,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006108364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:27,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:27,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:57:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168782537] [2024-06-21 20:57:27,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:27,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:57:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:57:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:57:27,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:27,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-06-21 20:57:27,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:27,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:27,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:28,314 INFO L124 PetriNetUnfolderBase]: 1911/2945 cut-off events. [2024-06-21 20:57:28,315 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 20:57:28,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5869 conditions, 2945 events. 1911/2945 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14834 event pairs, 1379 based on Foata normal form. 1/2857 useless extension candidates. Maximal degree in co-relation 5857. Up to 2825 conditions per place. [2024-06-21 20:57:28,337 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 20:57:28,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-21 20:57:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:57:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:57:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-21 20:57:28,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-21 20:57:28,350 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 80 transitions. [2024-06-21 20:57:28,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-21 20:57:28,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:28,358 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-21 20:57:28,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:57:28,363 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-21 20:57:28,363 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-21 20:57:28,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-06-21 20:57:28,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:28,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:28,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:57:28,365 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)] === [2024-06-21 20:57:28,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1962653832, now seen corresponding path program 1 times [2024-06-21 20:57:28,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:28,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530484663] [2024-06-21 20:57:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:28,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:29,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:29,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530484663] [2024-06-21 20:57:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530484663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:29,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:57:29,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293618482] [2024-06-21 20:57:29,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:29,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:57:29,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:29,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:57:29,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:57:29,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:29,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:29,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:29,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:29,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:29,677 INFO L124 PetriNetUnfolderBase]: 1905/2936 cut-off events. [2024-06-21 20:57:29,678 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2024-06-21 20:57:29,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6557 conditions, 2936 events. 1905/2936 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14810 event pairs, 1212 based on Foata normal form. 3/2890 useless extension candidates. Maximal degree in co-relation 6545. Up to 2801 conditions per place. [2024-06-21 20:57:29,695 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 20:57:29,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-21 20:57:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:57:29,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:57:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-21 20:57:29,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-21 20:57:29,698 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 103 transitions. [2024-06-21 20:57:29,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-21 20:57:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:57:29,700 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-21 20:57:29,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 20:57:29,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-21 20:57:29,702 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-21 20:57:29,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:29,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:29,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:29,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:57:29,703 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)] === [2024-06-21 20:57:29,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash 712727238, now seen corresponding path program 1 times [2024-06-21 20:57:29,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154331975] [2024-06-21 20:57:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:29,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:30,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:30,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154331975] [2024-06-21 20:57:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154331975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:30,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:30,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:57:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961354578] [2024-06-21 20:57:30,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:30,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:57:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:57:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:57:30,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:30,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:30,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:30,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:30,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:31,245 INFO L124 PetriNetUnfolderBase]: 1913/2962 cut-off events. [2024-06-21 20:57:31,246 INFO L125 PetriNetUnfolderBase]: For 1563/1563 co-relation queries the response was YES. [2024-06-21 20:57:31,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7292 conditions, 2962 events. 1913/2962 cut-off events. For 1563/1563 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15055 event pairs, 951 based on Foata normal form. 5/2925 useless extension candidates. Maximal degree in co-relation 7278. Up to 2747 conditions per place. [2024-06-21 20:57:31,268 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 20:57:31,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 402 flow [2024-06-21 20:57:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 20:57:31,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-21 20:57:31,274 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 134 transitions. [2024-06-21 20:57:31,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 402 flow [2024-06-21 20:57:31,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 388 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:57:31,279 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-21 20:57:31,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-21 20:57:31,280 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-21 20:57:31,281 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-21 20:57:31,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:31,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:31,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:31,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:57:31,281 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)] === [2024-06-21 20:57:31,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:31,282 INFO L85 PathProgramCache]: Analyzing trace with hash -433105421, now seen corresponding path program 1 times [2024-06-21 20:57:31,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:31,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434344563] [2024-06-21 20:57:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:31,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:32,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:32,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434344563] [2024-06-21 20:57:32,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434344563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:32,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:32,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243363238] [2024-06-21 20:57:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:32,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:32,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:32,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-21 20:57:32,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:32,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:32,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:33,231 INFO L124 PetriNetUnfolderBase]: 1921/2974 cut-off events. [2024-06-21 20:57:33,231 INFO L125 PetriNetUnfolderBase]: For 3601/3603 co-relation queries the response was YES. [2024-06-21 20:57:33,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8537 conditions, 2974 events. 1921/2974 cut-off events. For 3601/3603 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15086 event pairs, 784 based on Foata normal form. 7/2939 useless extension candidates. Maximal degree in co-relation 8520. Up to 2733 conditions per place. [2024-06-21 20:57:33,253 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 61 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-21 20:57:33,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 529 flow [2024-06-21 20:57:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 20:57:33,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-06-21 20:57:33,255 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 158 transitions. [2024-06-21 20:57:33,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 529 flow [2024-06-21 20:57:33,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 521 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 20:57:33,260 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 314 flow [2024-06-21 20:57:33,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-21 20:57:33,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-21 20:57:33,261 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 314 flow [2024-06-21 20:57:33,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-21 20:57:33,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:33,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:33,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:57:33,262 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)] === [2024-06-21 20:57:33,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2031095557, now seen corresponding path program 1 times [2024-06-21 20:57:33,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:33,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767684552] [2024-06-21 20:57:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:33,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:34,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:34,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767684552] [2024-06-21 20:57:34,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767684552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:34,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:34,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878469522] [2024-06-21 20:57:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:34,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:34,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:34,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:57:34,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:34,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:34,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:57:34,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:35,304 INFO L124 PetriNetUnfolderBase]: 1933/2994 cut-off events. [2024-06-21 20:57:35,305 INFO L125 PetriNetUnfolderBase]: For 5677/5679 co-relation queries the response was YES. [2024-06-21 20:57:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9498 conditions, 2994 events. 1933/2994 cut-off events. For 5677/5679 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15232 event pairs, 596 based on Foata normal form. 12/2964 useless extension candidates. Maximal degree in co-relation 9478. Up to 2701 conditions per place. [2024-06-21 20:57:35,379 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 65 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-21 20:57:35,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 630 flow [2024-06-21 20:57:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:57:35,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-21 20:57:35,381 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 314 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:57:35,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 630 flow [2024-06-21 20:57:35,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 581 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:35,391 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-21 20:57:35,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-21 20:57:35,394 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-21 20:57:35,395 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-21 20:57:35,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:35,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:35,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:35,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:57:35,400 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)] === [2024-06-21 20:57:35,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:35,401 INFO L85 PathProgramCache]: Analyzing trace with hash -631748548, now seen corresponding path program 1 times [2024-06-21 20:57:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:35,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480174885] [2024-06-21 20:57:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:35,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:36,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:36,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480174885] [2024-06-21 20:57:36,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480174885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:36,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:36,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:36,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408011726] [2024-06-21 20:57:36,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:36,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:36,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:57:36,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:36,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:36,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:57:36,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:36,885 INFO L124 PetriNetUnfolderBase]: 1928/2981 cut-off events. [2024-06-21 20:57:36,885 INFO L125 PetriNetUnfolderBase]: For 7782/7782 co-relation queries the response was YES. [2024-06-21 20:57:36,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10091 conditions, 2981 events. 1928/2981 cut-off events. For 7782/7782 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15122 event pairs, 776 based on Foata normal form. 2/2939 useless extension candidates. Maximal degree in co-relation 10069. Up to 2844 conditions per place. [2024-06-21 20:57:36,912 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 55 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-21 20:57:36,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 495 flow [2024-06-21 20:57:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-21 20:57:36,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-21 20:57:36,914 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 5 states and 102 transitions. [2024-06-21 20:57:36,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 495 flow [2024-06-21 20:57:36,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 431 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:36,921 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 301 flow [2024-06-21 20:57:36,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-21 20:57:36,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-21 20:57:36,924 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 301 flow [2024-06-21 20:57:36,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:36,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:36,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:36,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:57:36,925 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)] === [2024-06-21 20:57:36,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:36,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1860159738, now seen corresponding path program 1 times [2024-06-21 20:57:36,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839771189] [2024-06-21 20:57:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:37,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839771189] [2024-06-21 20:57:37,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839771189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:37,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:37,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371677782] [2024-06-21 20:57:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:37,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:37,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:37,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:37,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:37,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:37,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:37,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:38,638 INFO L124 PetriNetUnfolderBase]: 2264/3484 cut-off events. [2024-06-21 20:57:38,639 INFO L125 PetriNetUnfolderBase]: For 10324/10324 co-relation queries the response was YES. [2024-06-21 20:57:38,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11653 conditions, 3484 events. 2264/3484 cut-off events. For 10324/10324 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17571 event pairs, 936 based on Foata normal form. 2/3477 useless extension candidates. Maximal degree in co-relation 11629. Up to 3319 conditions per place. [2024-06-21 20:57:38,662 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-21 20:57:38,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 501 flow [2024-06-21 20:57:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 20:57:38,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-21 20:57:38,664 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 301 flow. Second operand 6 states and 115 transitions. [2024-06-21 20:57:38,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 501 flow [2024-06-21 20:57:38,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 479 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:38,672 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 335 flow [2024-06-21 20:57:38,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-21 20:57:38,673 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-21 20:57:38,673 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 335 flow [2024-06-21 20:57:38,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:38,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:38,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:38,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:57:38,674 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)] === [2024-06-21 20:57:38,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1781883887, now seen corresponding path program 1 times [2024-06-21 20:57:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938939814] [2024-06-21 20:57:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:38,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:39,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938939814] [2024-06-21 20:57:39,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938939814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:39,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:39,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:39,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358983341] [2024-06-21 20:57:39,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:39,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:39,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:39,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:39,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:39,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:57:39,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:39,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:39,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:57:39,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:40,330 INFO L124 PetriNetUnfolderBase]: 2136/3356 cut-off events. [2024-06-21 20:57:40,330 INFO L125 PetriNetUnfolderBase]: For 13134/13138 co-relation queries the response was YES. [2024-06-21 20:57:40,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11963 conditions, 3356 events. 2136/3356 cut-off events. For 13134/13138 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17417 event pairs, 853 based on Foata normal form. 8/3353 useless extension candidates. Maximal degree in co-relation 11939. Up to 3068 conditions per place. [2024-06-21 20:57:40,357 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-21 20:57:40,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 589 flow [2024-06-21 20:57:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 20:57:40,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-21 20:57:40,363 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 335 flow. Second operand 6 states and 129 transitions. [2024-06-21 20:57:40,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 589 flow [2024-06-21 20:57:40,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 557 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:40,372 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 375 flow [2024-06-21 20:57:40,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-21 20:57:40,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-21 20:57:40,374 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 375 flow [2024-06-21 20:57:40,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:40,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:40,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:40,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:57:40,375 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)] === [2024-06-21 20:57:40,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1751260847, now seen corresponding path program 2 times [2024-06-21 20:57:40,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:40,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022557644] [2024-06-21 20:57:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:40,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:41,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022557644] [2024-06-21 20:57:41,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022557644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:41,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:41,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:41,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507524332] [2024-06-21 20:57:41,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:41,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:41,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:41,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:57:41,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:41,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:41,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:57:41,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:42,073 INFO L124 PetriNetUnfolderBase]: 2121/3330 cut-off events. [2024-06-21 20:57:42,073 INFO L125 PetriNetUnfolderBase]: For 15350/15350 co-relation queries the response was YES. [2024-06-21 20:57:42,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12238 conditions, 3330 events. 2121/3330 cut-off events. For 15350/15350 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17281 event pairs, 849 based on Foata normal form. 2/3321 useless extension candidates. Maximal degree in co-relation 12213. Up to 3109 conditions per place. [2024-06-21 20:57:42,097 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-21 20:57:42,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 557 flow [2024-06-21 20:57:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:57:42,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:57:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 20:57:42,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:57:42,099 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 375 flow. Second operand 6 states and 120 transitions. [2024-06-21 20:57:42,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 557 flow [2024-06-21 20:57:42,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:42,110 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 376 flow [2024-06-21 20:57:42,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-21 20:57:42,111 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-21 20:57:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 376 flow [2024-06-21 20:57:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:42,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:42,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:57:42,113 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)] === [2024-06-21 20:57:42,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1830378617, now seen corresponding path program 1 times [2024-06-21 20:57:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:42,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212569880] [2024-06-21 20:57:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:43,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:43,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212569880] [2024-06-21 20:57:43,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212569880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:43,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:43,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:43,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730932640] [2024-06-21 20:57:43,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:43,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:43,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:43,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:43,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 376 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:43,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:43,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:43,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:43,997 INFO L124 PetriNetUnfolderBase]: 2245/3433 cut-off events. [2024-06-21 20:57:43,998 INFO L125 PetriNetUnfolderBase]: For 17996/17996 co-relation queries the response was YES. [2024-06-21 20:57:44,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12876 conditions, 3433 events. 2245/3433 cut-off events. For 17996/17996 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17138 event pairs, 888 based on Foata normal form. 4/3424 useless extension candidates. Maximal degree in co-relation 12850. Up to 3271 conditions per place. [2024-06-21 20:57:44,018 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-21 20:57:44,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 614 flow [2024-06-21 20:57:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:57:44,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 20:57:44,021 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 376 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:57:44,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 614 flow [2024-06-21 20:57:44,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 567 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:44,031 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 395 flow [2024-06-21 20:57:44,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-21 20:57:44,033 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-21 20:57:44,034 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 395 flow [2024-06-21 20:57:44,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:44,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:44,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:44,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:57:44,035 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)] === [2024-06-21 20:57:44,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:44,036 INFO L85 PathProgramCache]: Analyzing trace with hash 900488729, now seen corresponding path program 1 times [2024-06-21 20:57:44,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:44,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894400005] [2024-06-21 20:57:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:44,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894400005] [2024-06-21 20:57:45,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894400005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:45,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:45,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709170919] [2024-06-21 20:57:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:45,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:45,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:45,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:45,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:45,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:45,924 INFO L124 PetriNetUnfolderBase]: 2267/3500 cut-off events. [2024-06-21 20:57:45,924 INFO L125 PetriNetUnfolderBase]: For 21426/21430 co-relation queries the response was YES. [2024-06-21 20:57:45,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13713 conditions, 3500 events. 2267/3500 cut-off events. For 21426/21430 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17741 event pairs, 872 based on Foata normal form. 5/3490 useless extension candidates. Maximal degree in co-relation 13686. Up to 3193 conditions per place. [2024-06-21 20:57:45,984 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-21 20:57:45,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 743 flow [2024-06-21 20:57:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 20:57:45,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-21 20:57:45,986 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 395 flow. Second operand 7 states and 144 transitions. [2024-06-21 20:57:45,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 743 flow [2024-06-21 20:57:46,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 701 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:46,008 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 476 flow [2024-06-21 20:57:46,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-21 20:57:46,009 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-21 20:57:46,009 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 476 flow [2024-06-21 20:57:46,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:46,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:46,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:46,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:57:46,010 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)] === [2024-06-21 20:57:46,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 127234807, now seen corresponding path program 2 times [2024-06-21 20:57:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:46,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136225111] [2024-06-21 20:57:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:46,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:46,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:46,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136225111] [2024-06-21 20:57:46,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136225111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:46,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:46,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:46,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885805245] [2024-06-21 20:57:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:46,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:46,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:46,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:46,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:46,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:46,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:46,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:47,661 INFO L124 PetriNetUnfolderBase]: 2278/3515 cut-off events. [2024-06-21 20:57:47,661 INFO L125 PetriNetUnfolderBase]: For 25786/25786 co-relation queries the response was YES. [2024-06-21 20:57:47,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14680 conditions, 3515 events. 2278/3515 cut-off events. For 25786/25786 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17785 event pairs, 864 based on Foata normal form. 2/3502 useless extension candidates. Maximal degree in co-relation 14652. Up to 3328 conditions per place. [2024-06-21 20:57:47,688 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 77 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-21 20:57:47,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 738 flow [2024-06-21 20:57:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:57:47,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:57:47,690 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 476 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:57:47,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 738 flow [2024-06-21 20:57:47,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 700 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:47,712 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 512 flow [2024-06-21 20:57:47,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-21 20:57:47,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-21 20:57:47,713 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 512 flow [2024-06-21 20:57:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:47,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:47,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:47,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:57:47,713 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)] === [2024-06-21 20:57:47,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash 906917819, now seen corresponding path program 3 times [2024-06-21 20:57:47,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:47,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511699334] [2024-06-21 20:57:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:47,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:48,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:48,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511699334] [2024-06-21 20:57:48,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511699334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:48,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:48,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:48,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165835092] [2024-06-21 20:57:48,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:48,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:48,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:48,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:48,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:48,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:48,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:48,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:49,400 INFO L124 PetriNetUnfolderBase]: 2273/3508 cut-off events. [2024-06-21 20:57:49,401 INFO L125 PetriNetUnfolderBase]: For 29902/29902 co-relation queries the response was YES. [2024-06-21 20:57:49,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15114 conditions, 3508 events. 2273/3508 cut-off events. For 29902/29902 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17715 event pairs, 864 based on Foata normal form. 2/3495 useless extension candidates. Maximal degree in co-relation 15084. Up to 3303 conditions per place. [2024-06-21 20:57:49,425 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 75 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-21 20:57:49,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 786 flow [2024-06-21 20:57:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:57:49,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 20:57:49,427 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 512 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:57:49,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 786 flow [2024-06-21 20:57:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 740 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:49,453 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 556 flow [2024-06-21 20:57:49,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-21 20:57:49,453 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-21 20:57:49,454 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 556 flow [2024-06-21 20:57:49,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:49,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:49,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:49,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:57:49,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:57:49,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash -108138202, now seen corresponding path program 1 times [2024-06-21 20:57:49,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:49,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104865605] [2024-06-21 20:57:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:50,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:50,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104865605] [2024-06-21 20:57:50,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104865605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:50,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:50,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:57:50,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603659282] [2024-06-21 20:57:50,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:50,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:57:50,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:50,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:57:50,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:57:50,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:50,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 556 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:50,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:50,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:50,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:50,955 INFO L124 PetriNetUnfolderBase]: 2486/3849 cut-off events. [2024-06-21 20:57:50,955 INFO L125 PetriNetUnfolderBase]: For 38890/38890 co-relation queries the response was YES. [2024-06-21 20:57:50,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17016 conditions, 3849 events. 2486/3849 cut-off events. For 38890/38890 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19505 event pairs, 990 based on Foata normal form. 1/3849 useless extension candidates. Maximal degree in co-relation 16985. Up to 3628 conditions per place. [2024-06-21 20:57:50,980 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 73 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-21 20:57:50,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 762 flow [2024-06-21 20:57:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:57:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:57:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 20:57:50,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-21 20:57:50,982 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 556 flow. Second operand 5 states and 94 transitions. [2024-06-21 20:57:50,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 762 flow [2024-06-21 20:57:51,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 700 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:51,013 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 546 flow [2024-06-21 20:57:51,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2024-06-21 20:57:51,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-21 20:57:51,014 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 546 flow [2024-06-21 20:57:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:51,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:51,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:51,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:57:51,014 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)] === [2024-06-21 20:57:51,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1144725144, now seen corresponding path program 1 times [2024-06-21 20:57:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264385442] [2024-06-21 20:57:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:51,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:52,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:52,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264385442] [2024-06-21 20:57:52,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264385442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:52,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:52,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:52,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369288316] [2024-06-21 20:57:52,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:52,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:52,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:52,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:57:52,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 546 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:52,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:52,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:57:52,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:53,153 INFO L124 PetriNetUnfolderBase]: 2147/3373 cut-off events. [2024-06-21 20:57:53,153 INFO L125 PetriNetUnfolderBase]: For 37969/37971 co-relation queries the response was YES. [2024-06-21 20:57:53,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15562 conditions, 3373 events. 2147/3373 cut-off events. For 37969/37971 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17500 event pairs, 796 based on Foata normal form. 4/3376 useless extension candidates. Maximal degree in co-relation 15530. Up to 3024 conditions per place. [2024-06-21 20:57:53,172 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-21 20:57:53,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 115 transitions, 858 flow [2024-06-21 20:57:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 20:57:53,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 20:57:53,175 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 546 flow. Second operand 8 states and 167 transitions. [2024-06-21 20:57:53,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 115 transitions, 858 flow [2024-06-21 20:57:53,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 115 transitions, 828 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:53,198 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 613 flow [2024-06-21 20:57:53,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-06-21 20:57:53,200 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-21 20:57:53,200 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 613 flow [2024-06-21 20:57:53,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:53,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:53,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:53,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:57:53,201 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)] === [2024-06-21 20:57:53,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1301579723, now seen corresponding path program 1 times [2024-06-21 20:57:53,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:53,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260103335] [2024-06-21 20:57:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:53,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:54,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:54,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260103335] [2024-06-21 20:57:54,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260103335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:54,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:54,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:54,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346530633] [2024-06-21 20:57:54,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:54,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:54,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:54,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:54,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:54,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-21 20:57:54,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:54,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:54,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:54,811 INFO L124 PetriNetUnfolderBase]: 2276/3507 cut-off events. [2024-06-21 20:57:54,812 INFO L125 PetriNetUnfolderBase]: For 43267/43269 co-relation queries the response was YES. [2024-06-21 20:57:54,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 3507 events. 2276/3507 cut-off events. For 43267/43269 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17665 event pairs, 850 based on Foata normal form. 2/3508 useless extension candidates. Maximal degree in co-relation 16884. Up to 3198 conditions per place. [2024-06-21 20:57:54,828 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-21 20:57:54,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 999 flow [2024-06-21 20:57:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 20:57:54,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 20:57:54,830 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 613 flow. Second operand 7 states and 147 transitions. [2024-06-21 20:57:54,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 999 flow [2024-06-21 20:57:54,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 928 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:54,855 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 660 flow [2024-06-21 20:57:54,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-06-21 20:57:54,856 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-21 20:57:54,856 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 660 flow [2024-06-21 20:57:54,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-21 20:57:54,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:54,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:54,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:57:54,857 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)] === [2024-06-21 20:57:54,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1301585520, now seen corresponding path program 1 times [2024-06-21 20:57:54,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:54,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339097605] [2024-06-21 20:57:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:55,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:55,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339097605] [2024-06-21 20:57:55,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339097605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:55,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:55,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:55,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075715083] [2024-06-21 20:57:55,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:56,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:56,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 660 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:56,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:56,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:56,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:56,717 INFO L124 PetriNetUnfolderBase]: 2352/3618 cut-off events. [2024-06-21 20:57:56,717 INFO L125 PetriNetUnfolderBase]: For 49575/49577 co-relation queries the response was YES. [2024-06-21 20:57:56,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17813 conditions, 3618 events. 2352/3618 cut-off events. For 49575/49577 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18222 event pairs, 760 based on Foata normal form. 8/3625 useless extension candidates. Maximal degree in co-relation 17779. Up to 3174 conditions per place. [2024-06-21 20:57:56,733 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 87 selfloop transitions, 38 changer transitions 0/130 dead transitions. [2024-06-21 20:57:56,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 1140 flow [2024-06-21 20:57:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:57:56,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 20:57:56,735 INFO L175 Difference]: Start difference. First operand has 83 places, 89 transitions, 660 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:57:56,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 1140 flow [2024-06-21 20:57:56,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 130 transitions, 1038 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:57:56,765 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 749 flow [2024-06-21 20:57:56,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=749, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-21 20:57:56,765 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-21 20:57:56,766 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 749 flow [2024-06-21 20:57:56,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:56,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:56,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:56,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:57:56,766 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)] === [2024-06-21 20:57:56,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1301585303, now seen corresponding path program 2 times [2024-06-21 20:57:56,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:56,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752397978] [2024-06-21 20:57:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:57,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:57,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752397978] [2024-06-21 20:57:57,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752397978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:57,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:57,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:57:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044379127] [2024-06-21 20:57:57,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:57,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:57:57,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:57,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:57:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:57:57,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:57,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 749 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-21 20:57:57,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:57,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:57,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:58,368 INFO L124 PetriNetUnfolderBase]: 2363/3634 cut-off events. [2024-06-21 20:57:58,368 INFO L125 PetriNetUnfolderBase]: For 55927/55929 co-relation queries the response was YES. [2024-06-21 20:57:58,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 3634 events. 2363/3634 cut-off events. For 55927/55929 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18303 event pairs, 790 based on Foata normal form. 2/3635 useless extension candidates. Maximal degree in co-relation 18963. Up to 3320 conditions per place. [2024-06-21 20:57:58,387 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-21 20:57:58,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 126 transitions, 1159 flow [2024-06-21 20:57:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:57:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:57:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:57:58,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:57:58,390 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 749 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:57:58,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 126 transitions, 1159 flow [2024-06-21 20:57:58,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1112 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:58,423 INFO L231 Difference]: Finished difference. Result has 91 places, 102 transitions, 825 flow [2024-06-21 20:57:58,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=825, PETRI_PLACES=91, PETRI_TRANSITIONS=102} [2024-06-21 20:57:58,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-06-21 20:57:58,424 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 102 transitions, 825 flow [2024-06-21 20:57:58,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-21 20:57:58,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:58,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:58,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:57:58,425 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)] === [2024-06-21 20:57:58,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:58,425 INFO L85 PathProgramCache]: Analyzing trace with hash -350419782, now seen corresponding path program 2 times [2024-06-21 20:57:58,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:58,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071832887] [2024-06-21 20:57:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:58,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:59,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:59,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071832887] [2024-06-21 20:57:59,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071832887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:59,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:59,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:59,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861157889] [2024-06-21 20:57:59,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:59,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:59,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:59,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:59,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:57:59,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 825 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:59,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:59,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:57:59,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:00,097 INFO L124 PetriNetUnfolderBase]: 2385/3670 cut-off events. [2024-06-21 20:58:00,097 INFO L125 PetriNetUnfolderBase]: For 62099/62099 co-relation queries the response was YES. [2024-06-21 20:58:00,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19503 conditions, 3670 events. 2385/3670 cut-off events. For 62099/62099 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18534 event pairs, 782 based on Foata normal form. 4/3673 useless extension candidates. Maximal degree in co-relation 19464. Up to 3466 conditions per place. [2024-06-21 20:58:00,118 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 107 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2024-06-21 20:58:00,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 129 transitions, 1177 flow [2024-06-21 20:58:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:58:00,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 20:58:00,120 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 825 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:58:00,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 129 transitions, 1177 flow [2024-06-21 20:58:00,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1101 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:00,164 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 839 flow [2024-06-21 20:58:00,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=839, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-21 20:58:00,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-21 20:58:00,164 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 839 flow [2024-06-21 20:58:00,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:00,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:00,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:00,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:58:00,165 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)] === [2024-06-21 20:58:00,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1942965446, now seen corresponding path program 3 times [2024-06-21 20:58:00,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:00,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427860529] [2024-06-21 20:58:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:00,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:01,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427860529] [2024-06-21 20:58:01,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427860529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:01,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:01,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:01,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681179802] [2024-06-21 20:58:01,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:01,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:01,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:01,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:01,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:01,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:01,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 839 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:01,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:01,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:01,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:01,799 INFO L124 PetriNetUnfolderBase]: 2407/3707 cut-off events. [2024-06-21 20:58:01,800 INFO L125 PetriNetUnfolderBase]: For 69226/69226 co-relation queries the response was YES. [2024-06-21 20:58:01,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20125 conditions, 3707 events. 2407/3707 cut-off events. For 69226/69226 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18743 event pairs, 782 based on Foata normal form. 4/3710 useless extension candidates. Maximal degree in co-relation 20085. Up to 3471 conditions per place. [2024-06-21 20:58:01,821 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 106 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-21 20:58:01,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1209 flow [2024-06-21 20:58:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:58:01,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 20:58:01,823 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 839 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:58:01,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1209 flow [2024-06-21 20:58:01,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 133 transitions, 1141 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:01,850 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 877 flow [2024-06-21 20:58:01,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=877, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-21 20:58:01,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-21 20:58:01,851 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 877 flow [2024-06-21 20:58:01,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:01,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:01,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:58:01,852 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)] === [2024-06-21 20:58:01,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1950317096, now seen corresponding path program 4 times [2024-06-21 20:58:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:01,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126255931] [2024-06-21 20:58:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:01,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:02,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:02,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126255931] [2024-06-21 20:58:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126255931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:02,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:02,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:02,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927359504] [2024-06-21 20:58:02,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:02,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:02,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:02,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:02,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 877 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:02,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:02,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:02,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:03,537 INFO L124 PetriNetUnfolderBase]: 2397/3693 cut-off events. [2024-06-21 20:58:03,537 INFO L125 PetriNetUnfolderBase]: For 75215/75215 co-relation queries the response was YES. [2024-06-21 20:58:03,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20405 conditions, 3693 events. 2397/3693 cut-off events. For 75215/75215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18648 event pairs, 780 based on Foata normal form. 4/3696 useless extension candidates. Maximal degree in co-relation 20365. Up to 3421 conditions per place. [2024-06-21 20:58:03,560 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2024-06-21 20:58:03,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 136 transitions, 1259 flow [2024-06-21 20:58:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:58:03,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 20:58:03,561 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 877 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:58:03,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 136 transitions, 1259 flow [2024-06-21 20:58:03,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1181 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:03,598 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 925 flow [2024-06-21 20:58:03,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=925, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-21 20:58:03,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-21 20:58:03,599 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 925 flow [2024-06-21 20:58:03,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:03,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:03,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:03,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:58:03,600 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)] === [2024-06-21 20:58:03,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1942965663, now seen corresponding path program 3 times [2024-06-21 20:58:03,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:03,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067078446] [2024-06-21 20:58:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:03,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:04,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:04,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067078446] [2024-06-21 20:58:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067078446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:04,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:04,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258719722] [2024-06-21 20:58:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:04,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:04,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:04,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 925 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-21 20:58:04,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:04,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:04,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:05,086 INFO L124 PetriNetUnfolderBase]: 2392/3687 cut-off events. [2024-06-21 20:58:05,086 INFO L125 PetriNetUnfolderBase]: For 81294/81296 co-relation queries the response was YES. [2024-06-21 20:58:05,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20731 conditions, 3687 events. 2392/3687 cut-off events. For 81294/81296 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18639 event pairs, 784 based on Foata normal form. 4/3690 useless extension candidates. Maximal degree in co-relation 20690. Up to 3486 conditions per place. [2024-06-21 20:58:05,109 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 109 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-21 20:58:05,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 130 transitions, 1223 flow [2024-06-21 20:58:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:58:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:58:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:58:05,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 20:58:05,110 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 925 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:58:05,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 130 transitions, 1223 flow [2024-06-21 20:58:05,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1103 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:05,154 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 845 flow [2024-06-21 20:58:05,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-21 20:58:05,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-21 20:58:05,154 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 845 flow [2024-06-21 20:58:05,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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) [2024-06-21 20:58:05,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:05,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:05,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:58:05,155 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:05,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash 986477248, now seen corresponding path program 1 times [2024-06-21 20:58:05,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:05,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614963807] [2024-06-21 20:58:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:05,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:05,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:05,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614963807] [2024-06-21 20:58:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614963807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:05,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:05,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:58:05,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819411376] [2024-06-21 20:58:05,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:05,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:58:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:05,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:58:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:58:05,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:05,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 845 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:05,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:05,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:05,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:06,700 INFO L124 PetriNetUnfolderBase]: 2955/4406 cut-off events. [2024-06-21 20:58:06,700 INFO L125 PetriNetUnfolderBase]: For 113140/113140 co-relation queries the response was YES. [2024-06-21 20:58:06,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25422 conditions, 4406 events. 2955/4406 cut-off events. For 113140/113140 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21469 event pairs, 1046 based on Foata normal form. 1/4406 useless extension candidates. Maximal degree in co-relation 25380. Up to 4306 conditions per place. [2024-06-21 20:58:06,722 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 101 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-21 20:58:06,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 123 transitions, 1119 flow [2024-06-21 20:58:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:58:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:58:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 20:58:06,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-21 20:58:06,723 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 845 flow. Second operand 6 states and 103 transitions. [2024-06-21 20:58:06,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 123 transitions, 1119 flow [2024-06-21 20:58:06,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1054 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:06,781 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 842 flow [2024-06-21 20:58:06,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=842, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-21 20:58:06,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-21 20:58:06,782 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 842 flow [2024-06-21 20:58:06,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:06,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:06,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:06,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:58:06,783 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)] === [2024-06-21 20:58:06,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1126682078, now seen corresponding path program 1 times [2024-06-21 20:58:06,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:06,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890583069] [2024-06-21 20:58:06,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:06,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:07,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:07,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890583069] [2024-06-21 20:58:07,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890583069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:07,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:07,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008081267] [2024-06-21 20:58:07,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:07,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:07,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:08,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:58:08,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 842 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:08,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:08,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:58:08,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:08,698 INFO L124 PetriNetUnfolderBase]: 2354/3677 cut-off events. [2024-06-21 20:58:08,698 INFO L125 PetriNetUnfolderBase]: For 107446/107448 co-relation queries the response was YES. [2024-06-21 20:58:08,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22319 conditions, 3677 events. 2354/3677 cut-off events. For 107446/107448 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19216 event pairs, 572 based on Foata normal form. 6/3682 useless extension candidates. Maximal degree in co-relation 22276. Up to 3199 conditions per place. [2024-06-21 20:58:08,725 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-06-21 20:58:08,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 1350 flow [2024-06-21 20:58:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 20:58:08,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-21 20:58:08,727 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 842 flow. Second operand 8 states and 169 transitions. [2024-06-21 20:58:08,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 1350 flow [2024-06-21 20:58:08,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 151 transitions, 1310 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:08,783 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 935 flow [2024-06-21 20:58:08,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2024-06-21 20:58:08,783 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-21 20:58:08,784 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 935 flow [2024-06-21 20:58:08,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:08,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:08,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:08,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:58:08,784 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)] === [2024-06-21 20:58:08,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1126742528, now seen corresponding path program 2 times [2024-06-21 20:58:08,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:08,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44803234] [2024-06-21 20:58:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:08,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:09,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:09,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44803234] [2024-06-21 20:58:09,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44803234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:09,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:09,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610787856] [2024-06-21 20:58:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:09,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:10,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:58:10,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 118 transitions, 935 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:10,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:10,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:58:10,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:10,689 INFO L124 PetriNetUnfolderBase]: 2382/3720 cut-off events. [2024-06-21 20:58:10,690 INFO L125 PetriNetUnfolderBase]: For 116911/116913 co-relation queries the response was YES. [2024-06-21 20:58:10,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23188 conditions, 3720 events. 2382/3720 cut-off events. For 116911/116913 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19457 event pairs, 733 based on Foata normal form. 6/3725 useless extension candidates. Maximal degree in co-relation 23144. Up to 3315 conditions per place. [2024-06-21 20:58:10,714 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 111 selfloop transitions, 28 changer transitions 0/153 dead transitions. [2024-06-21 20:58:10,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 153 transitions, 1343 flow [2024-06-21 20:58:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:58:10,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 20:58:10,716 INFO L175 Difference]: Start difference. First operand has 103 places, 118 transitions, 935 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:58:10,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 153 transitions, 1343 flow [2024-06-21 20:58:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 153 transitions, 1269 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:10,785 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 982 flow [2024-06-21 20:58:10,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=982, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-06-21 20:58:10,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-21 20:58:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 982 flow [2024-06-21 20:58:10,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:10,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:10,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:10,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:58:10,786 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)] === [2024-06-21 20:58:10,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1126742652, now seen corresponding path program 1 times [2024-06-21 20:58:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967330638] [2024-06-21 20:58:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:10,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:11,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:11,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967330638] [2024-06-21 20:58:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967330638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:11,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:11,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032181240] [2024-06-21 20:58:11,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:11,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:11,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:12,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:12,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 982 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:12,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:12,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:12,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:12,670 INFO L124 PetriNetUnfolderBase]: 2526/3869 cut-off events. [2024-06-21 20:58:12,671 INFO L125 PetriNetUnfolderBase]: For 125084/125086 co-relation queries the response was YES. [2024-06-21 20:58:12,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24168 conditions, 3869 events. 2526/3869 cut-off events. For 125084/125086 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19671 event pairs, 766 based on Foata normal form. 2/3870 useless extension candidates. Maximal degree in co-relation 24122. Up to 3442 conditions per place. [2024-06-21 20:58:12,699 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 109 selfloop transitions, 45 changer transitions 0/160 dead transitions. [2024-06-21 20:58:12,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 160 transitions, 1536 flow [2024-06-21 20:58:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:12,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 20:58:12,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 20:58:12,701 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 982 flow. Second operand 8 states and 164 transitions. [2024-06-21 20:58:12,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 160 transitions, 1536 flow [2024-06-21 20:58:12,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 1476 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:12,772 INFO L231 Difference]: Finished difference. Result has 111 places, 129 transitions, 1098 flow [2024-06-21 20:58:12,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=111, PETRI_TRANSITIONS=129} [2024-06-21 20:58:12,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-21 20:58:12,772 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 129 transitions, 1098 flow [2024-06-21 20:58:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:12,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:12,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:12,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:58:12,773 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)] === [2024-06-21 20:58:12,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1129543812, now seen corresponding path program 2 times [2024-06-21 20:58:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968129597] [2024-06-21 20:58:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968129597] [2024-06-21 20:58:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968129597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:14,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:14,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117751710] [2024-06-21 20:58:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:14,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:14,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:14,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:14,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:14,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 129 transitions, 1098 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:14,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:14,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:14,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:14,880 INFO L124 PetriNetUnfolderBase]: 2537/3885 cut-off events. [2024-06-21 20:58:14,880 INFO L125 PetriNetUnfolderBase]: For 135006/135008 co-relation queries the response was YES. [2024-06-21 20:58:14,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24988 conditions, 3885 events. 2537/3885 cut-off events. For 135006/135008 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19778 event pairs, 766 based on Foata normal form. 2/3886 useless extension candidates. Maximal degree in co-relation 24941. Up to 3536 conditions per place. [2024-06-21 20:58:14,904 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 39 changer transitions 0/158 dead transitions. [2024-06-21 20:58:14,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 158 transitions, 1510 flow [2024-06-21 20:58:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 20:58:14,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 20:58:14,906 INFO L175 Difference]: Start difference. First operand has 111 places, 129 transitions, 1098 flow. Second operand 8 states and 159 transitions. [2024-06-21 20:58:14,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 158 transitions, 1510 flow [2024-06-21 20:58:14,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 158 transitions, 1425 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:14,963 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 1147 flow [2024-06-21 20:58:14,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1147, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-21 20:58:14,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 20:58:14,964 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 1147 flow [2024-06-21 20:58:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:14,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:14,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:14,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:58:14,964 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)] === [2024-06-21 20:58:14,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1129539038, now seen corresponding path program 3 times [2024-06-21 20:58:14,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:14,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720307483] [2024-06-21 20:58:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:14,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:16,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720307483] [2024-06-21 20:58:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720307483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:16,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:16,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704640193] [2024-06-21 20:58:16,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:16,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:16,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:58:16,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 1147 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:16,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:16,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:58:16,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:16,825 INFO L124 PetriNetUnfolderBase]: 2402/3746 cut-off events. [2024-06-21 20:58:16,826 INFO L125 PetriNetUnfolderBase]: For 143357/143359 co-relation queries the response was YES. [2024-06-21 20:58:16,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24654 conditions, 3746 events. 2402/3746 cut-off events. For 143357/143359 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19530 event pairs, 725 based on Foata normal form. 6/3751 useless extension candidates. Maximal degree in co-relation 24605. Up to 3363 conditions per place. [2024-06-21 20:58:16,853 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 118 selfloop transitions, 24 changer transitions 0/159 dead transitions. [2024-06-21 20:58:16,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 159 transitions, 1499 flow [2024-06-21 20:58:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:16,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 20:58:16,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 20:58:16,855 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 1147 flow. Second operand 8 states and 163 transitions. [2024-06-21 20:58:16,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 159 transitions, 1499 flow [2024-06-21 20:58:16,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 159 transitions, 1387 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:16,932 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 1090 flow [2024-06-21 20:58:16,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1090, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2024-06-21 20:58:16,933 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-21 20:58:16,933 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 1090 flow [2024-06-21 20:58:16,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:16,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:16,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:16,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:58:16,934 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)] === [2024-06-21 20:58:16,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1578971330, now seen corresponding path program 3 times [2024-06-21 20:58:16,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:16,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692424397] [2024-06-21 20:58:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:16,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:18,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692424397] [2024-06-21 20:58:18,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692424397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:18,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:18,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:18,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989304019] [2024-06-21 20:58:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:18,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:18,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:18,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:18,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 1090 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:18,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:18,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:18,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:18,841 INFO L124 PetriNetUnfolderBase]: 2540/3889 cut-off events. [2024-06-21 20:58:18,842 INFO L125 PetriNetUnfolderBase]: For 151969/151971 co-relation queries the response was YES. [2024-06-21 20:58:18,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25596 conditions, 3889 events. 2540/3889 cut-off events. For 151969/151971 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19804 event pairs, 764 based on Foata normal form. 2/3890 useless extension candidates. Maximal degree in co-relation 25546. Up to 3522 conditions per place. [2024-06-21 20:58:18,867 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 111 selfloop transitions, 44 changer transitions 0/161 dead transitions. [2024-06-21 20:58:18,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 161 transitions, 1506 flow [2024-06-21 20:58:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:58:18,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:58:18,868 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 1090 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:58:18,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 161 transitions, 1506 flow [2024-06-21 20:58:18,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 1430 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:58:18,961 INFO L231 Difference]: Finished difference. Result has 117 places, 135 transitions, 1156 flow [2024-06-21 20:58:18,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1156, PETRI_PLACES=117, PETRI_TRANSITIONS=135} [2024-06-21 20:58:18,962 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-21 20:58:18,962 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 135 transitions, 1156 flow [2024-06-21 20:58:18,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:18,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:18,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:58:18,963 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)] === [2024-06-21 20:58:18,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1694262500, now seen corresponding path program 4 times [2024-06-21 20:58:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:18,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931348334] [2024-06-21 20:58:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:20,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:20,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931348334] [2024-06-21 20:58:20,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931348334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:20,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:20,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:20,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920523153] [2024-06-21 20:58:20,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:20,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:20,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:20,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:20,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 135 transitions, 1156 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:20,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:20,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:20,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:21,014 INFO L124 PetriNetUnfolderBase]: 2551/3905 cut-off events. [2024-06-21 20:58:21,014 INFO L125 PetriNetUnfolderBase]: For 161822/161824 co-relation queries the response was YES. [2024-06-21 20:58:21,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26071 conditions, 3905 events. 2551/3905 cut-off events. For 161822/161824 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19851 event pairs, 764 based on Foata normal form. 2/3906 useless extension candidates. Maximal degree in co-relation 26020. Up to 3511 conditions per place. [2024-06-21 20:58:21,043 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 118 selfloop transitions, 48 changer transitions 0/172 dead transitions. [2024-06-21 20:58:21,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 172 transitions, 1732 flow [2024-06-21 20:58:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 20:58:21,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-21 20:58:21,044 INFO L175 Difference]: Start difference. First operand has 117 places, 135 transitions, 1156 flow. Second operand 8 states and 169 transitions. [2024-06-21 20:58:21,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 172 transitions, 1732 flow [2024-06-21 20:58:21,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 172 transitions, 1620 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:21,139 INFO L231 Difference]: Finished difference. Result has 119 places, 138 transitions, 1194 flow [2024-06-21 20:58:21,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1194, PETRI_PLACES=119, PETRI_TRANSITIONS=138} [2024-06-21 20:58:21,139 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-21 20:58:21,140 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 138 transitions, 1194 flow [2024-06-21 20:58:21,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:21,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:21,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:58:21,140 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)] === [2024-06-21 20:58:21,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:21,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1694267150, now seen corresponding path program 5 times [2024-06-21 20:58:21,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:21,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945220685] [2024-06-21 20:58:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:21,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:22,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:22,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945220685] [2024-06-21 20:58:22,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945220685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:22,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:22,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:22,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880422486] [2024-06-21 20:58:22,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:22,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:22,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:22,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:22,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:22,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 138 transitions, 1194 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:22,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:22,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:22,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:23,094 INFO L124 PetriNetUnfolderBase]: 2562/3921 cut-off events. [2024-06-21 20:58:23,094 INFO L125 PetriNetUnfolderBase]: For 171891/171893 co-relation queries the response was YES. [2024-06-21 20:58:23,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26539 conditions, 3921 events. 2562/3921 cut-off events. For 171891/171893 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19926 event pairs, 764 based on Foata normal form. 2/3922 useless extension candidates. Maximal degree in co-relation 26487. Up to 3572 conditions per place. [2024-06-21 20:58:23,124 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 122 selfloop transitions, 42 changer transitions 0/170 dead transitions. [2024-06-21 20:58:23,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 170 transitions, 1648 flow [2024-06-21 20:58:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:58:23,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 20:58:23,126 INFO L175 Difference]: Start difference. First operand has 119 places, 138 transitions, 1194 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:58:23,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 170 transitions, 1648 flow [2024-06-21 20:58:23,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 170 transitions, 1504 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:23,231 INFO L231 Difference]: Finished difference. Result has 121 places, 141 transitions, 1200 flow [2024-06-21 20:58:23,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1200, PETRI_PLACES=121, PETRI_TRANSITIONS=141} [2024-06-21 20:58:23,232 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-21 20:58:23,232 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 141 transitions, 1200 flow [2024-06-21 20:58:23,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:23,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:23,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:23,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:58:23,232 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)] === [2024-06-21 20:58:23,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:23,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1244835168, now seen corresponding path program 1 times [2024-06-21 20:58:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:23,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736252756] [2024-06-21 20:58:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:23,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:24,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736252756] [2024-06-21 20:58:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736252756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:24,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209659069] [2024-06-21 20:58:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:24,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:24,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:24,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:24,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:24,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 141 transitions, 1200 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:24,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:24,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:24,841 INFO L124 PetriNetUnfolderBase]: 2584/3958 cut-off events. [2024-06-21 20:58:24,841 INFO L125 PetriNetUnfolderBase]: For 183494/183496 co-relation queries the response was YES. [2024-06-21 20:58:24,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26985 conditions, 3958 events. 2584/3958 cut-off events. For 183494/183496 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20162 event pairs, 732 based on Foata normal form. 4/3961 useless extension candidates. Maximal degree in co-relation 26932. Up to 3427 conditions per place. [2024-06-21 20:58:24,868 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 117 selfloop transitions, 55 changer transitions 0/178 dead transitions. [2024-06-21 20:58:24,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 178 transitions, 1802 flow [2024-06-21 20:58:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 20:58:24,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-21 20:58:24,870 INFO L175 Difference]: Start difference. First operand has 121 places, 141 transitions, 1200 flow. Second operand 8 states and 170 transitions. [2024-06-21 20:58:24,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 178 transitions, 1802 flow [2024-06-21 20:58:24,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 178 transitions, 1688 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:24,984 INFO L231 Difference]: Finished difference. Result has 123 places, 144 transitions, 1252 flow [2024-06-21 20:58:24,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1252, PETRI_PLACES=123, PETRI_TRANSITIONS=144} [2024-06-21 20:58:24,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-21 20:58:24,985 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 144 transitions, 1252 flow [2024-06-21 20:58:24,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:24,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:24,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:24,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:58:24,986 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)] === [2024-06-21 20:58:24,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1245008148, now seen corresponding path program 2 times [2024-06-21 20:58:24,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:24,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272649410] [2024-06-21 20:58:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:24,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:25,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:25,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272649410] [2024-06-21 20:58:25,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272649410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:25,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:25,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:25,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182579361] [2024-06-21 20:58:25,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:25,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:26,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:26,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 144 transitions, 1252 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:26,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:26,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:26,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:26,644 INFO L124 PetriNetUnfolderBase]: 2638/4036 cut-off events. [2024-06-21 20:58:26,644 INFO L125 PetriNetUnfolderBase]: For 197099/197101 co-relation queries the response was YES. [2024-06-21 20:58:26,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28011 conditions, 4036 events. 2638/4036 cut-off events. For 197099/197101 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20662 event pairs, 737 based on Foata normal form. 4/4039 useless extension candidates. Maximal degree in co-relation 27957. Up to 3473 conditions per place. [2024-06-21 20:58:26,681 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 122 selfloop transitions, 56 changer transitions 0/184 dead transitions. [2024-06-21 20:58:26,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 2054 flow [2024-06-21 20:58:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 20:58:26,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-21 20:58:26,682 INFO L175 Difference]: Start difference. First operand has 123 places, 144 transitions, 1252 flow. Second operand 8 states and 170 transitions. [2024-06-21 20:58:26,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 2054 flow [2024-06-21 20:58:26,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 184 transitions, 1888 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:26,800 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1314 flow [2024-06-21 20:58:26,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-21 20:58:26,800 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-21 20:58:26,800 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1314 flow [2024-06-21 20:58:26,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:26,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:26,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:58:26,801 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)] === [2024-06-21 20:58:26,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:26,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1245014658, now seen corresponding path program 3 times [2024-06-21 20:58:26,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:26,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772147715] [2024-06-21 20:58:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:26,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:27,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772147715] [2024-06-21 20:58:27,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772147715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:27,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:27,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:27,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467560155] [2024-06-21 20:58:27,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:27,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:27,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:27,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:27,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1314 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:27,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:27,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:28,451 INFO L124 PetriNetUnfolderBase]: 2628/4022 cut-off events. [2024-06-21 20:58:28,451 INFO L125 PetriNetUnfolderBase]: For 205596/205598 co-relation queries the response was YES. [2024-06-21 20:58:28,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28077 conditions, 4022 events. 2628/4022 cut-off events. For 205596/205598 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20575 event pairs, 737 based on Foata normal form. 4/4025 useless extension candidates. Maximal degree in co-relation 28022. Up to 3465 conditions per place. [2024-06-21 20:58:28,482 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 118 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-21 20:58:28,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 1874 flow [2024-06-21 20:58:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:58:28,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 20:58:28,483 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1314 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:58:28,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 1874 flow [2024-06-21 20:58:28,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 181 transitions, 1731 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:28,589 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1294 flow [2024-06-21 20:58:28,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1294, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-21 20:58:28,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-21 20:58:28,589 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1294 flow [2024-06-21 20:58:28,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:28,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:28,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:28,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:58:28,590 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)] === [2024-06-21 20:58:28,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1245007962, now seen corresponding path program 6 times [2024-06-21 20:58:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:28,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909323994] [2024-06-21 20:58:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:29,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:29,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909323994] [2024-06-21 20:58:29,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909323994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:29,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:29,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551613771] [2024-06-21 20:58:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:29,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:29,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1294 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:29,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:29,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:29,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:30,364 INFO L124 PetriNetUnfolderBase]: 2639/4038 cut-off events. [2024-06-21 20:58:30,364 INFO L125 PetriNetUnfolderBase]: For 215723/215725 co-relation queries the response was YES. [2024-06-21 20:58:30,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28458 conditions, 4038 events. 2639/4038 cut-off events. For 215723/215725 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20667 event pairs, 774 based on Foata normal form. 2/4039 useless extension candidates. Maximal degree in co-relation 28402. Up to 3684 conditions per place. [2024-06-21 20:58:30,395 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 134 selfloop transitions, 39 changer transitions 0/179 dead transitions. [2024-06-21 20:58:30,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 179 transitions, 1758 flow [2024-06-21 20:58:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:58:30,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 20:58:30,396 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1294 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:58:30,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 179 transitions, 1758 flow [2024-06-21 20:58:30,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 1635 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:30,536 INFO L231 Difference]: Finished difference. Result has 130 places, 153 transitions, 1315 flow [2024-06-21 20:58:30,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=130, PETRI_TRANSITIONS=153} [2024-06-21 20:58:30,537 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-21 20:58:30,537 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 153 transitions, 1315 flow [2024-06-21 20:58:30,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:30,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:30,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:58:30,537 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:30,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash -854899131, now seen corresponding path program 1 times [2024-06-21 20:58:30,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:30,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044861078] [2024-06-21 20:58:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:31,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:31,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044861078] [2024-06-21 20:58:31,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044861078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:31,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:31,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:58:31,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534895391] [2024-06-21 20:58:31,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:31,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:58:31,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:58:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:58:31,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 153 transitions, 1315 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:31,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:31,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:31,956 INFO L124 PetriNetUnfolderBase]: 2970/4519 cut-off events. [2024-06-21 20:58:31,956 INFO L125 PetriNetUnfolderBase]: For 258010/258010 co-relation queries the response was YES. [2024-06-21 20:58:31,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31983 conditions, 4519 events. 2970/4519 cut-off events. For 258010/258010 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 22781 event pairs, 933 based on Foata normal form. 1/4519 useless extension candidates. Maximal degree in co-relation 31926. Up to 4218 conditions per place. [2024-06-21 20:58:31,991 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 139 selfloop transitions, 16 changer transitions 0/175 dead transitions. [2024-06-21 20:58:31,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 175 transitions, 1815 flow [2024-06-21 20:58:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:58:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:58:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 20:58:31,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:58:31,992 INFO L175 Difference]: Start difference. First operand has 130 places, 153 transitions, 1315 flow. Second operand 6 states and 117 transitions. [2024-06-21 20:58:31,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 175 transitions, 1815 flow [2024-06-21 20:58:32,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1701 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:32,128 INFO L231 Difference]: Finished difference. Result has 130 places, 159 transitions, 1325 flow [2024-06-21 20:58:32,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=130, PETRI_TRANSITIONS=159} [2024-06-21 20:58:32,129 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-21 20:58:32,129 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 159 transitions, 1325 flow [2024-06-21 20:58:32,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:32,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:32,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:32,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:58:32,129 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)] === [2024-06-21 20:58:32,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash -102385312, now seen corresponding path program 4 times [2024-06-21 20:58:32,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:32,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331531796] [2024-06-21 20:58:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:32,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:32,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:32,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331531796] [2024-06-21 20:58:32,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331531796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:32,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:32,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458957420] [2024-06-21 20:58:32,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:33,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:33,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 159 transitions, 1325 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:33,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:33,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:33,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:33,764 INFO L124 PetriNetUnfolderBase]: 2729/4159 cut-off events. [2024-06-21 20:58:33,764 INFO L125 PetriNetUnfolderBase]: For 244125/244127 co-relation queries the response was YES. [2024-06-21 20:58:33,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30010 conditions, 4159 events. 2729/4159 cut-off events. For 244125/244127 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21166 event pairs, 775 based on Foata normal form. 6/4164 useless extension candidates. Maximal degree in co-relation 29952. Up to 3809 conditions per place. [2024-06-21 20:58:33,797 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 158 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-21 20:58:33,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 2159 flow [2024-06-21 20:58:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 20:58:33,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-21 20:58:33,798 INFO L175 Difference]: Start difference. First operand has 130 places, 159 transitions, 1325 flow. Second operand 8 states and 161 transitions. [2024-06-21 20:58:33,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 2159 flow [2024-06-21 20:58:33,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 195 transitions, 2117 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 20:58:33,934 INFO L231 Difference]: Finished difference. Result has 136 places, 165 transitions, 1455 flow [2024-06-21 20:58:33,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1455, PETRI_PLACES=136, PETRI_TRANSITIONS=165} [2024-06-21 20:58:33,935 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-21 20:58:33,935 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 165 transitions, 1455 flow [2024-06-21 20:58:33,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:33,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:33,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:58:33,936 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)] === [2024-06-21 20:58:33,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2013609110, now seen corresponding path program 7 times [2024-06-21 20:58:33,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:33,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936652241] [2024-06-21 20:58:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:33,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:34,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:34,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936652241] [2024-06-21 20:58:34,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936652241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:34,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:34,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675465817] [2024-06-21 20:58:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:35,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:35,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 165 transitions, 1455 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:35,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:35,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:35,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:35,765 INFO L124 PetriNetUnfolderBase]: 2724/4152 cut-off events. [2024-06-21 20:58:35,765 INFO L125 PetriNetUnfolderBase]: For 254630/254632 co-relation queries the response was YES. [2024-06-21 20:58:35,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30380 conditions, 4152 events. 2724/4152 cut-off events. For 254630/254632 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21157 event pairs, 780 based on Foata normal form. 4/4155 useless extension candidates. Maximal degree in co-relation 30320. Up to 3914 conditions per place. [2024-06-21 20:58:35,801 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 163 selfloop transitions, 19 changer transitions 0/188 dead transitions. [2024-06-21 20:58:35,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 1877 flow [2024-06-21 20:58:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:58:35,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 20:58:35,803 INFO L175 Difference]: Start difference. First operand has 136 places, 165 transitions, 1455 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:58:35,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 1877 flow [2024-06-21 20:58:36,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 188 transitions, 1734 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:36,025 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1358 flow [2024-06-21 20:58:36,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-21 20:58:36,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-21 20:58:36,026 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1358 flow [2024-06-21 20:58:36,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:36,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:36,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:36,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:58:36,026 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)] === [2024-06-21 20:58:36,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:36,027 INFO L85 PathProgramCache]: Analyzing trace with hash 2013609296, now seen corresponding path program 5 times [2024-06-21 20:58:36,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:36,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136891328] [2024-06-21 20:58:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:36,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:36,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136891328] [2024-06-21 20:58:36,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136891328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:36,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:36,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312093778] [2024-06-21 20:58:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:36,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:36,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:36,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:36,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1358 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:36,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:36,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:36,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:37,703 INFO L124 PetriNetUnfolderBase]: 2714/4138 cut-off events. [2024-06-21 20:58:37,703 INFO L125 PetriNetUnfolderBase]: For 264588/264590 co-relation queries the response was YES. [2024-06-21 20:58:37,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30247 conditions, 4138 events. 2714/4138 cut-off events. For 264588/264590 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21107 event pairs, 766 based on Foata normal form. 6/4143 useless extension candidates. Maximal degree in co-relation 30186. Up to 3794 conditions per place. [2024-06-21 20:58:37,735 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 155 selfloop transitions, 32 changer transitions 0/193 dead transitions. [2024-06-21 20:58:37,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 193 transitions, 1952 flow [2024-06-21 20:58:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:37,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:58:37,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 20:58:37,736 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1358 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:58:37,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 193 transitions, 1952 flow [2024-06-21 20:58:37,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 193 transitions, 1859 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:37,955 INFO L231 Difference]: Finished difference. Result has 140 places, 165 transitions, 1337 flow [2024-06-21 20:58:37,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1337, PETRI_PLACES=140, PETRI_TRANSITIONS=165} [2024-06-21 20:58:37,955 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-21 20:58:37,956 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 165 transitions, 1337 flow [2024-06-21 20:58:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:37,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:37,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:58:37,956 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)] === [2024-06-21 20:58:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2021890016, now seen corresponding path program 6 times [2024-06-21 20:58:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599904728] [2024-06-21 20:58:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:38,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:38,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599904728] [2024-06-21 20:58:38,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599904728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:38,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:38,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529624533] [2024-06-21 20:58:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:38,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:38,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:38,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:38,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 165 transitions, 1337 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:38,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:38,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:38,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:39,592 INFO L124 PetriNetUnfolderBase]: 2704/4124 cut-off events. [2024-06-21 20:58:39,593 INFO L125 PetriNetUnfolderBase]: For 274581/274583 co-relation queries the response was YES. [2024-06-21 20:58:39,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30363 conditions, 4124 events. 2704/4124 cut-off events. For 274581/274583 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 21023 event pairs, 771 based on Foata normal form. 6/4129 useless extension candidates. Maximal degree in co-relation 30301. Up to 3863 conditions per place. [2024-06-21 20:58:39,625 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 165 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2024-06-21 20:58:39,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 190 transitions, 1771 flow [2024-06-21 20:58:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:58:39,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 20:58:39,627 INFO L175 Difference]: Start difference. First operand has 140 places, 165 transitions, 1337 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:58:39,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 190 transitions, 1771 flow [2024-06-21 20:58:39,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 1650 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:39,875 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1262 flow [2024-06-21 20:58:39,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1262, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2024-06-21 20:58:39,876 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-21 20:58:39,876 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1262 flow [2024-06-21 20:58:39,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:39,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:39,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:39,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:58:39,877 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:39,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash 516009219, now seen corresponding path program 2 times [2024-06-21 20:58:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789737410] [2024-06-21 20:58:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:40,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:40,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789737410] [2024-06-21 20:58:40,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789737410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:40,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:40,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:40,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696365514] [2024-06-21 20:58:40,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:40,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:40,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:40,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:40,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1262 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:40,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:40,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:40,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:41,421 INFO L124 PetriNetUnfolderBase]: 3007/4591 cut-off events. [2024-06-21 20:58:41,421 INFO L125 PetriNetUnfolderBase]: For 324832/324835 co-relation queries the response was YES. [2024-06-21 20:58:41,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33773 conditions, 4591 events. 3007/4591 cut-off events. For 324832/324835 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23342 event pairs, 1414 based on Foata normal form. 4/4584 useless extension candidates. Maximal degree in co-relation 33710. Up to 4299 conditions per place. [2024-06-21 20:58:41,457 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 142 selfloop transitions, 13 changer transitions 0/175 dead transitions. [2024-06-21 20:58:41,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 175 transitions, 1606 flow [2024-06-21 20:58:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:58:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:58:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 20:58:41,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 20:58:41,458 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1262 flow. Second operand 7 states and 119 transitions. [2024-06-21 20:58:41,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 175 transitions, 1606 flow [2024-06-21 20:58:41,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 175 transitions, 1514 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 20:58:41,808 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1221 flow [2024-06-21 20:58:41,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1221, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-21 20:58:41,809 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-21 20:58:41,809 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1221 flow [2024-06-21 20:58:41,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:41,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:41,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:41,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:58:41,810 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:41,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:41,810 INFO L85 PathProgramCache]: Analyzing trace with hash -849179259, now seen corresponding path program 1 times [2024-06-21 20:58:41,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:41,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680399715] [2024-06-21 20:58:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:42,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:42,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680399715] [2024-06-21 20:58:42,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680399715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:42,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:42,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:58:42,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40966507] [2024-06-21 20:58:42,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:42,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:58:42,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:58:42,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:58:42,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:42,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1221 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:42,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:42,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:42,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:43,419 INFO L124 PetriNetUnfolderBase]: 3012/4598 cut-off events. [2024-06-21 20:58:43,419 INFO L125 PetriNetUnfolderBase]: For 339079/339082 co-relation queries the response was YES. [2024-06-21 20:58:43,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34026 conditions, 4598 events. 3012/4598 cut-off events. For 339079/339082 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23393 event pairs, 1414 based on Foata normal form. 4/4591 useless extension candidates. Maximal degree in co-relation 33961. Up to 4293 conditions per place. [2024-06-21 20:58:43,449 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 148 selfloop transitions, 17 changer transitions 0/185 dead transitions. [2024-06-21 20:58:43,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 185 transitions, 1727 flow [2024-06-21 20:58:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:58:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:58:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 20:58:43,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 20:58:43,451 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1221 flow. Second operand 6 states and 114 transitions. [2024-06-21 20:58:43,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 185 transitions, 1727 flow [2024-06-21 20:58:43,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 185 transitions, 1692 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:43,716 INFO L231 Difference]: Finished difference. Result has 142 places, 173 transitions, 1296 flow [2024-06-21 20:58:43,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1296, PETRI_PLACES=142, PETRI_TRANSITIONS=173} [2024-06-21 20:58:43,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 97 predicate places. [2024-06-21 20:58:43,717 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 173 transitions, 1296 flow [2024-06-21 20:58:43,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:43,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:43,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:43,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:58:43,718 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:58:43,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash 560701671, now seen corresponding path program 2 times [2024-06-21 20:58:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:43,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590177032] [2024-06-21 20:58:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:43,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:44,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:44,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590177032] [2024-06-21 20:58:44,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590177032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:44,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:44,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:58:44,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802754943] [2024-06-21 20:58:44,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:58:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:58:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:58:44,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:44,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 173 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:44,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:44,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:44,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:45,304 INFO L124 PetriNetUnfolderBase]: 3009/4595 cut-off events. [2024-06-21 20:58:45,304 INFO L125 PetriNetUnfolderBase]: For 354798/354803 co-relation queries the response was YES. [2024-06-21 20:58:45,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34750 conditions, 4595 events. 3009/4595 cut-off events. For 354798/354803 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23342 event pairs, 1417 based on Foata normal form. 6/4590 useless extension candidates. Maximal degree in co-relation 34684. Up to 4290 conditions per place. [2024-06-21 20:58:45,341 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 144 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-06-21 20:58:45,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 181 transitions, 1638 flow [2024-06-21 20:58:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:58:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:58:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 20:58:45,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 20:58:45,342 INFO L175 Difference]: Start difference. First operand has 142 places, 173 transitions, 1296 flow. Second operand 6 states and 110 transitions. [2024-06-21 20:58:45,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 181 transitions, 1638 flow [2024-06-21 20:58:45,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 181 transitions, 1581 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 20:58:45,660 INFO L231 Difference]: Finished difference. Result has 146 places, 173 transitions, 1279 flow [2024-06-21 20:58:45,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1279, PETRI_PLACES=146, PETRI_TRANSITIONS=173} [2024-06-21 20:58:45,661 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-21 20:58:45,661 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 173 transitions, 1279 flow [2024-06-21 20:58:45,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:45,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:45,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:58:45,662 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)] === [2024-06-21 20:58:45,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2022197846, now seen corresponding path program 1 times [2024-06-21 20:58:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:45,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988912591] [2024-06-21 20:58:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:47,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:47,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988912591] [2024-06-21 20:58:47,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988912591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:47,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:47,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:58:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241910650] [2024-06-21 20:58:47,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:58:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:58:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:58:47,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:47,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 173 transitions, 1279 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:47,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:47,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:47,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:48,277 INFO L124 PetriNetUnfolderBase]: 3135/4719 cut-off events. [2024-06-21 20:58:48,277 INFO L125 PetriNetUnfolderBase]: For 367803/367803 co-relation queries the response was YES. [2024-06-21 20:58:48,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35389 conditions, 4719 events. 3135/4719 cut-off events. For 367803/367803 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23410 event pairs, 1425 based on Foata normal form. 4/4722 useless extension candidates. Maximal degree in co-relation 35321. Up to 4484 conditions per place. [2024-06-21 20:58:48,313 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 178 selfloop transitions, 22 changer transitions 0/205 dead transitions. [2024-06-21 20:58:48,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 205 transitions, 1804 flow [2024-06-21 20:58:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:58:48,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-21 20:58:48,315 INFO L175 Difference]: Start difference. First operand has 146 places, 173 transitions, 1279 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:58:48,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 205 transitions, 1804 flow [2024-06-21 20:58:48,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 205 transitions, 1753 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:48,619 INFO L231 Difference]: Finished difference. Result has 150 places, 178 transitions, 1346 flow [2024-06-21 20:58:48,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1346, PETRI_PLACES=150, PETRI_TRANSITIONS=178} [2024-06-21 20:58:48,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-21 20:58:48,619 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 178 transitions, 1346 flow [2024-06-21 20:58:48,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:48,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:48,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:48,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:58:48,620 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)] === [2024-06-21 20:58:48,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -841550779, now seen corresponding path program 1 times [2024-06-21 20:58:48,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:48,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268003364] [2024-06-21 20:58:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:49,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268003364] [2024-06-21 20:58:49,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268003364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:49,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:49,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:58:49,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266952465] [2024-06-21 20:58:49,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:49,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:58:49,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:49,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:58:49,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:58:49,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:58:49,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 178 transitions, 1346 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:49,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:49,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:58:49,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:50,376 INFO L124 PetriNetUnfolderBase]: 3190/4768 cut-off events. [2024-06-21 20:58:50,377 INFO L125 PetriNetUnfolderBase]: For 381507/381510 co-relation queries the response was YES. [2024-06-21 20:58:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36293 conditions, 4768 events. 3190/4768 cut-off events. For 381507/381510 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23301 event pairs, 1497 based on Foata normal form. 6/4763 useless extension candidates. Maximal degree in co-relation 36224. Up to 4614 conditions per place. [2024-06-21 20:58:50,421 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 159 selfloop transitions, 15 changer transitions 0/192 dead transitions. [2024-06-21 20:58:50,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 192 transitions, 1756 flow [2024-06-21 20:58:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:58:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:58:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 20:58:50,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-21 20:58:50,422 INFO L175 Difference]: Start difference. First operand has 150 places, 178 transitions, 1346 flow. Second operand 7 states and 118 transitions. [2024-06-21 20:58:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 192 transitions, 1756 flow [2024-06-21 20:58:50,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 192 transitions, 1681 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:50,725 INFO L231 Difference]: Finished difference. Result has 151 places, 181 transitions, 1349 flow [2024-06-21 20:58:50,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1349, PETRI_PLACES=151, PETRI_TRANSITIONS=181} [2024-06-21 20:58:50,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-21 20:58:50,726 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 181 transitions, 1349 flow [2024-06-21 20:58:50,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:50,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:50,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:58:50,727 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)] === [2024-06-21 20:58:50,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1145893924, now seen corresponding path program 1 times [2024-06-21 20:58:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:50,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346006170] [2024-06-21 20:58:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:50,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:51,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346006170] [2024-06-21 20:58:51,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346006170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:51,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:51,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:51,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70599575] [2024-06-21 20:58:51,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:51,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:51,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:52,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:52,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 181 transitions, 1349 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:52,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:52,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:52,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:53,086 INFO L124 PetriNetUnfolderBase]: 3341/5094 cut-off events. [2024-06-21 20:58:53,087 INFO L125 PetriNetUnfolderBase]: For 392792/392798 co-relation queries the response was YES. [2024-06-21 20:58:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38279 conditions, 5094 events. 3341/5094 cut-off events. For 392792/392798 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 26570 event pairs, 923 based on Foata normal form. 8/5091 useless extension candidates. Maximal degree in co-relation 38209. Up to 4307 conditions per place. [2024-06-21 20:58:53,123 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 199 selfloop transitions, 93 changer transitions 0/299 dead transitions. [2024-06-21 20:58:53,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 299 transitions, 2758 flow [2024-06-21 20:58:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:58:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:58:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 20:58:53,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-21 20:58:53,124 INFO L175 Difference]: Start difference. First operand has 151 places, 181 transitions, 1349 flow. Second operand 10 states and 203 transitions. [2024-06-21 20:58:53,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 299 transitions, 2758 flow [2024-06-21 20:58:53,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 299 transitions, 2702 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:53,430 INFO L231 Difference]: Finished difference. Result has 160 places, 242 transitions, 2075 flow [2024-06-21 20:58:53,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2075, PETRI_PLACES=160, PETRI_TRANSITIONS=242} [2024-06-21 20:58:53,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-06-21 20:58:53,430 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 242 transitions, 2075 flow [2024-06-21 20:58:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:53,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:53,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:53,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:58:53,431 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)] === [2024-06-21 20:58:53,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1318670794, now seen corresponding path program 2 times [2024-06-21 20:58:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:53,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373239529] [2024-06-21 20:58:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:53,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:54,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:54,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373239529] [2024-06-21 20:58:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373239529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:54,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:54,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:54,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036066296] [2024-06-21 20:58:54,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:54,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:54,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:54,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:54,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 242 transitions, 2075 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:54,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:54,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:54,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:55,874 INFO L124 PetriNetUnfolderBase]: 3443/5253 cut-off events. [2024-06-21 20:58:55,874 INFO L125 PetriNetUnfolderBase]: For 414962/414972 co-relation queries the response was YES. [2024-06-21 20:58:55,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40765 conditions, 5253 events. 3443/5253 cut-off events. For 414962/414972 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 27557 event pairs, 930 based on Foata normal form. 12/5259 useless extension candidates. Maximal degree in co-relation 40690. Up to 4526 conditions per place. [2024-06-21 20:58:55,927 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 206 selfloop transitions, 109 changer transitions 0/322 dead transitions. [2024-06-21 20:58:55,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 322 transitions, 3358 flow [2024-06-21 20:58:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:58:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:58:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-21 20:58:55,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-21 20:58:55,930 INFO L175 Difference]: Start difference. First operand has 160 places, 242 transitions, 2075 flow. Second operand 11 states and 221 transitions. [2024-06-21 20:58:55,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 322 transitions, 3358 flow [2024-06-21 20:58:56,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 322 transitions, 3277 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 20:58:56,593 INFO L231 Difference]: Finished difference. Result has 173 places, 267 transitions, 2577 flow [2024-06-21 20:58:56,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2577, PETRI_PLACES=173, PETRI_TRANSITIONS=267} [2024-06-21 20:58:56,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-21 20:58:56,594 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 267 transitions, 2577 flow [2024-06-21 20:58:56,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:56,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:56,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:56,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:58:56,595 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)] === [2024-06-21 20:58:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1318674514, now seen corresponding path program 3 times [2024-06-21 20:58:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:56,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965540661] [2024-06-21 20:58:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:56,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:57,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:57,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965540661] [2024-06-21 20:58:57,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965540661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:57,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:57,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:57,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534025582] [2024-06-21 20:58:57,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:57,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:57,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:57,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:58:57,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 267 transitions, 2577 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:57,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:57,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:58:57,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:58,969 INFO L124 PetriNetUnfolderBase]: 3435/5241 cut-off events. [2024-06-21 20:58:58,969 INFO L125 PetriNetUnfolderBase]: For 429778/429788 co-relation queries the response was YES. [2024-06-21 20:58:58,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41506 conditions, 5241 events. 3435/5241 cut-off events. For 429778/429788 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 27461 event pairs, 933 based on Foata normal form. 12/5247 useless extension candidates. Maximal degree in co-relation 41425. Up to 4589 conditions per place. [2024-06-21 20:58:59,016 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 210 selfloop transitions, 106 changer transitions 0/323 dead transitions. [2024-06-21 20:58:59,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 323 transitions, 3442 flow [2024-06-21 20:58:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:58:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:58:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-21 20:58:59,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:58:59,017 INFO L175 Difference]: Start difference. First operand has 173 places, 267 transitions, 2577 flow. Second operand 12 states and 234 transitions. [2024-06-21 20:58:59,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 323 transitions, 3442 flow [2024-06-21 20:58:59,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 323 transitions, 3293 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:59,532 INFO L231 Difference]: Finished difference. Result has 182 places, 270 transitions, 2692 flow [2024-06-21 20:58:59,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2428, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2692, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2024-06-21 20:58:59,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-21 20:58:59,533 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2692 flow [2024-06-21 20:58:59,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:59,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:59,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:59,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:58:59,533 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)] === [2024-06-21 20:58:59,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 276379963, now seen corresponding path program 1 times [2024-06-21 20:58:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:59,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221409486] [2024-06-21 20:58:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:00,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:00,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221409486] [2024-06-21 20:59:00,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221409486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:00,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:00,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:00,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242811765] [2024-06-21 20:59:00,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:00,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:00,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:00,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:00,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2692 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:00,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:00,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:00,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:01,922 INFO L124 PetriNetUnfolderBase]: 3718/5690 cut-off events. [2024-06-21 20:59:01,923 INFO L125 PetriNetUnfolderBase]: For 452235/452245 co-relation queries the response was YES. [2024-06-21 20:59:01,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44111 conditions, 5690 events. 3718/5690 cut-off events. For 452235/452245 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 30517 event pairs, 923 based on Foata normal form. 12/5699 useless extension candidates. Maximal degree in co-relation 44026. Up to 4579 conditions per place. [2024-06-21 20:59:01,979 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 243 selfloop transitions, 146 changer transitions 0/396 dead transitions. [2024-06-21 20:59:01,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 396 transitions, 4277 flow [2024-06-21 20:59:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:59:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:59:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-21 20:59:01,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458041958041958 [2024-06-21 20:59:01,980 INFO L175 Difference]: Start difference. First operand has 182 places, 270 transitions, 2692 flow. Second operand 13 states and 262 transitions. [2024-06-21 20:59:01,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 396 transitions, 4277 flow [2024-06-21 20:59:02,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 396 transitions, 4074 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:02,446 INFO L231 Difference]: Finished difference. Result has 190 places, 326 transitions, 3294 flow [2024-06-21 20:59:02,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3294, PETRI_PLACES=190, PETRI_TRANSITIONS=326} [2024-06-21 20:59:02,447 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-21 20:59:02,447 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 326 transitions, 3294 flow [2024-06-21 20:59:02,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:02,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:02,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:59:02,447 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:02,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:02,447 INFO L85 PathProgramCache]: Analyzing trace with hash 391626997, now seen corresponding path program 1 times [2024-06-21 20:59:02,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:02,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354419081] [2024-06-21 20:59:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:03,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:03,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354419081] [2024-06-21 20:59:03,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354419081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:03,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:03,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:03,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985748624] [2024-06-21 20:59:03,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:03,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:03,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:03,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:03,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:03,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:03,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 326 transitions, 3294 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:03,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:03,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:03,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:04,388 INFO L124 PetriNetUnfolderBase]: 3907/5935 cut-off events. [2024-06-21 20:59:04,388 INFO L125 PetriNetUnfolderBase]: For 487897/487907 co-relation queries the response was YES. [2024-06-21 20:59:04,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 5935 events. 3907/5935 cut-off events. For 487897/487907 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 31219 event pairs, 1034 based on Foata normal form. 11/5940 useless extension candidates. Maximal degree in co-relation 47640. Up to 5288 conditions per place. [2024-06-21 20:59:04,446 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 279 selfloop transitions, 52 changer transitions 0/371 dead transitions. [2024-06-21 20:59:04,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 371 transitions, 4474 flow [2024-06-21 20:59:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 20:59:04,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 20:59:04,447 INFO L175 Difference]: Start difference. First operand has 190 places, 326 transitions, 3294 flow. Second operand 8 states and 163 transitions. [2024-06-21 20:59:04,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 371 transitions, 4474 flow [2024-06-21 20:59:05,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 371 transitions, 4379 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:59:05,113 INFO L231 Difference]: Finished difference. Result has 195 places, 345 transitions, 3617 flow [2024-06-21 20:59:05,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3617, PETRI_PLACES=195, PETRI_TRANSITIONS=345} [2024-06-21 20:59:05,114 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-21 20:59:05,114 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 345 transitions, 3617 flow [2024-06-21 20:59:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:05,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:59:05,115 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:05,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash 608087543, now seen corresponding path program 2 times [2024-06-21 20:59:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007747668] [2024-06-21 20:59:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:05,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:05,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007747668] [2024-06-21 20:59:05,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007747668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:05,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:05,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3111906] [2024-06-21 20:59:05,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:05,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:05,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:05,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 345 transitions, 3617 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:05,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:05,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:05,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:07,098 INFO L124 PetriNetUnfolderBase]: 3963/6021 cut-off events. [2024-06-21 20:59:07,098 INFO L125 PetriNetUnfolderBase]: For 513801/513813 co-relation queries the response was YES. [2024-06-21 20:59:07,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49968 conditions, 6021 events. 3963/6021 cut-off events. For 513801/513813 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 31828 event pairs, 1233 based on Foata normal form. 13/6028 useless extension candidates. Maximal degree in co-relation 49874. Up to 5342 conditions per place. [2024-06-21 20:59:07,167 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 288 selfloop transitions, 71 changer transitions 0/399 dead transitions. [2024-06-21 20:59:07,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 399 transitions, 5141 flow [2024-06-21 20:59:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 20:59:07,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 20:59:07,168 INFO L175 Difference]: Start difference. First operand has 195 places, 345 transitions, 3617 flow. Second operand 8 states and 164 transitions. [2024-06-21 20:59:07,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 399 transitions, 5141 flow [2024-06-21 20:59:07,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 399 transitions, 5008 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 20:59:07,919 INFO L231 Difference]: Finished difference. Result has 204 places, 374 transitions, 4153 flow [2024-06-21 20:59:07,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3546, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4153, PETRI_PLACES=204, PETRI_TRANSITIONS=374} [2024-06-21 20:59:07,919 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-21 20:59:07,920 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 374 transitions, 4153 flow [2024-06-21 20:59:07,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:07,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:07,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:07,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:59:07,920 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)] === [2024-06-21 20:59:07,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1379134180, now seen corresponding path program 4 times [2024-06-21 20:59:07,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:07,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139119518] [2024-06-21 20:59:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:07,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:08,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:08,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139119518] [2024-06-21 20:59:08,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139119518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:08,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:08,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:08,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064813364] [2024-06-21 20:59:08,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:08,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:08,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:08,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:08,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 374 transitions, 4153 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:08,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:08,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:08,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:10,157 INFO L124 PetriNetUnfolderBase]: 4075/6268 cut-off events. [2024-06-21 20:59:10,158 INFO L125 PetriNetUnfolderBase]: For 532430/532443 co-relation queries the response was YES. [2024-06-21 20:59:10,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51839 conditions, 6268 events. 4075/6268 cut-off events. For 532430/532443 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34641 event pairs, 869 based on Foata normal form. 14/6273 useless extension candidates. Maximal degree in co-relation 51740. Up to 4726 conditions per place. [2024-06-21 20:59:10,224 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 273 selfloop transitions, 174 changer transitions 0/454 dead transitions. [2024-06-21 20:59:10,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 454 transitions, 5873 flow [2024-06-21 20:59:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:59:10,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-21 20:59:10,227 INFO L175 Difference]: Start difference. First operand has 204 places, 374 transitions, 4153 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:59:10,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 454 transitions, 5873 flow [2024-06-21 20:59:11,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 454 transitions, 5775 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 20:59:11,167 INFO L231 Difference]: Finished difference. Result has 214 places, 406 transitions, 4846 flow [2024-06-21 20:59:11,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4846, PETRI_PLACES=214, PETRI_TRANSITIONS=406} [2024-06-21 20:59:11,168 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-21 20:59:11,168 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 406 transitions, 4846 flow [2024-06-21 20:59:11,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:11,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:11,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:11,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:59:11,168 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)] === [2024-06-21 20:59:11,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1114523894, now seen corresponding path program 5 times [2024-06-21 20:59:11,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:11,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542902771] [2024-06-21 20:59:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:12,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542902771] [2024-06-21 20:59:12,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542902771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:12,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:12,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:12,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369483288] [2024-06-21 20:59:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:12,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:12,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:12,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:12,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:12,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:12,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 406 transitions, 4846 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:12,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:12,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:12,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:13,410 INFO L124 PetriNetUnfolderBase]: 4355/6698 cut-off events. [2024-06-21 20:59:13,410 INFO L125 PetriNetUnfolderBase]: For 565830/565850 co-relation queries the response was YES. [2024-06-21 20:59:13,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55966 conditions, 6698 events. 4355/6698 cut-off events. For 565830/565850 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 37603 event pairs, 1051 based on Foata normal form. 22/6706 useless extension candidates. Maximal degree in co-relation 55863. Up to 5186 conditions per place. [2024-06-21 20:59:13,485 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 296 selfloop transitions, 197 changer transitions 0/500 dead transitions. [2024-06-21 20:59:13,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 500 transitions, 6862 flow [2024-06-21 20:59:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:59:13,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-21 20:59:13,487 INFO L175 Difference]: Start difference. First operand has 214 places, 406 transitions, 4846 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:59:13,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 500 transitions, 6862 flow [2024-06-21 20:59:14,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 500 transitions, 6509 flow, removed 90 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:14,788 INFO L231 Difference]: Finished difference. Result has 222 places, 456 transitions, 5720 flow [2024-06-21 20:59:14,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4628, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5720, PETRI_PLACES=222, PETRI_TRANSITIONS=456} [2024-06-21 20:59:14,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-06-21 20:59:14,789 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 456 transitions, 5720 flow [2024-06-21 20:59:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:14,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:14,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:14,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:59:14,790 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)] === [2024-06-21 20:59:14,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:14,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1295176390, now seen corresponding path program 6 times [2024-06-21 20:59:14,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:14,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431871334] [2024-06-21 20:59:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:14,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:15,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:15,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431871334] [2024-06-21 20:59:15,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431871334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:15,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:15,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:15,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812955725] [2024-06-21 20:59:15,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:15,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:15,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:15,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:15,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:15,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 456 transitions, 5720 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:15,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:15,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:15,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:17,177 INFO L124 PetriNetUnfolderBase]: 4424/6806 cut-off events. [2024-06-21 20:59:17,177 INFO L125 PetriNetUnfolderBase]: For 587878/587906 co-relation queries the response was YES. [2024-06-21 20:59:17,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58130 conditions, 6806 events. 4424/6806 cut-off events. For 587878/587906 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38220 event pairs, 1066 based on Foata normal form. 30/6827 useless extension candidates. Maximal degree in co-relation 58022. Up to 5666 conditions per place. [2024-06-21 20:59:17,259 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 321 selfloop transitions, 181 changer transitions 0/509 dead transitions. [2024-06-21 20:59:17,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 509 transitions, 7297 flow [2024-06-21 20:59:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 20:59:17,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 20:59:17,260 INFO L175 Difference]: Start difference. First operand has 222 places, 456 transitions, 5720 flow. Second operand 9 states and 186 transitions. [2024-06-21 20:59:17,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 509 transitions, 7297 flow [2024-06-21 20:59:18,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 509 transitions, 7157 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:18,317 INFO L231 Difference]: Finished difference. Result has 229 places, 470 transitions, 6282 flow [2024-06-21 20:59:18,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6282, PETRI_PLACES=229, PETRI_TRANSITIONS=470} [2024-06-21 20:59:18,317 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-21 20:59:18,318 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 470 transitions, 6282 flow [2024-06-21 20:59:18,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:18,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:18,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:18,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:59:18,318 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)] === [2024-06-21 20:59:18,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1114433529, now seen corresponding path program 2 times [2024-06-21 20:59:18,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:18,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749225861] [2024-06-21 20:59:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:18,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:19,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:19,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749225861] [2024-06-21 20:59:19,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749225861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:19,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:19,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997287274] [2024-06-21 20:59:19,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:19,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:19,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:19,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:19,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 470 transitions, 6282 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:19,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:19,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:19,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:21,100 INFO L124 PetriNetUnfolderBase]: 4567/7036 cut-off events. [2024-06-21 20:59:21,100 INFO L125 PetriNetUnfolderBase]: For 597153/597181 co-relation queries the response was YES. [2024-06-21 20:59:21,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60478 conditions, 7036 events. 4567/7036 cut-off events. For 597153/597181 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39934 event pairs, 1063 based on Foata normal form. 28/7060 useless extension candidates. Maximal degree in co-relation 60368. Up to 5228 conditions per place. [2024-06-21 20:59:21,172 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 326 selfloop transitions, 224 changer transitions 0/557 dead transitions. [2024-06-21 20:59:21,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 557 transitions, 8421 flow [2024-06-21 20:59:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 20:59:21,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-21 20:59:21,173 INFO L175 Difference]: Start difference. First operand has 229 places, 470 transitions, 6282 flow. Second operand 9 states and 197 transitions. [2024-06-21 20:59:21,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 557 transitions, 8421 flow [2024-06-21 20:59:21,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 557 transitions, 8201 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:21,959 INFO L231 Difference]: Finished difference. Result has 235 places, 501 transitions, 6960 flow [2024-06-21 20:59:21,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6960, PETRI_PLACES=235, PETRI_TRANSITIONS=501} [2024-06-21 20:59:21,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-21 20:59:21,960 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 501 transitions, 6960 flow [2024-06-21 20:59:21,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:21,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:21,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:21,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:59:21,961 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)] === [2024-06-21 20:59:21,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2055122016, now seen corresponding path program 7 times [2024-06-21 20:59:21,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:21,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483606154] [2024-06-21 20:59:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:22,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:22,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483606154] [2024-06-21 20:59:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483606154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:22,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:22,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:22,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978846739] [2024-06-21 20:59:22,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:22,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:22,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:22,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:22,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:22,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 501 transitions, 6960 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:22,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:22,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:22,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:24,606 INFO L124 PetriNetUnfolderBase]: 4544/6993 cut-off events. [2024-06-21 20:59:24,606 INFO L125 PetriNetUnfolderBase]: For 592561/592589 co-relation queries the response was YES. [2024-06-21 20:59:24,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61542 conditions, 6993 events. 4544/6993 cut-off events. For 592561/592589 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 39436 event pairs, 1117 based on Foata normal form. 30/7017 useless extension candidates. Maximal degree in co-relation 61429. Up to 6008 conditions per place. [2024-06-21 20:59:24,689 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 361 selfloop transitions, 168 changer transitions 0/536 dead transitions. [2024-06-21 20:59:24,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 536 transitions, 8193 flow [2024-06-21 20:59:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 20:59:24,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 20:59:24,690 INFO L175 Difference]: Start difference. First operand has 235 places, 501 transitions, 6960 flow. Second operand 9 states and 184 transitions. [2024-06-21 20:59:24,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 536 transitions, 8193 flow [2024-06-21 20:59:25,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 536 transitions, 8028 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:25,625 INFO L231 Difference]: Finished difference. Result has 240 places, 501 transitions, 7155 flow [2024-06-21 20:59:25,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7155, PETRI_PLACES=240, PETRI_TRANSITIONS=501} [2024-06-21 20:59:25,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-21 20:59:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 501 transitions, 7155 flow [2024-06-21 20:59:25,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:25,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:25,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:59:25,626 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)] === [2024-06-21 20:59:25,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 113089226, now seen corresponding path program 8 times [2024-06-21 20:59:25,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:25,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162515926] [2024-06-21 20:59:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:25,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:26,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:26,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162515926] [2024-06-21 20:59:26,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162515926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:26,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:26,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:26,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055022942] [2024-06-21 20:59:26,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:26,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:26,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:26,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 501 transitions, 7155 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:26,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:26,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:26,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:28,508 INFO L124 PetriNetUnfolderBase]: 4696/7234 cut-off events. [2024-06-21 20:59:28,508 INFO L125 PetriNetUnfolderBase]: For 597644/597656 co-relation queries the response was YES. [2024-06-21 20:59:28,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63731 conditions, 7234 events. 4696/7234 cut-off events. For 597644/597656 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 41302 event pairs, 1331 based on Foata normal form. 16/7244 useless extension candidates. Maximal degree in co-relation 63617. Up to 6381 conditions per place. [2024-06-21 20:59:28,599 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 457 selfloop transitions, 115 changer transitions 0/579 dead transitions. [2024-06-21 20:59:28,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 579 transitions, 9365 flow [2024-06-21 20:59:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 20:59:28,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-21 20:59:28,600 INFO L175 Difference]: Start difference. First operand has 240 places, 501 transitions, 7155 flow. Second operand 10 states and 206 transitions. [2024-06-21 20:59:28,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 579 transitions, 9365 flow [2024-06-21 20:59:29,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 579 transitions, 8980 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:29,637 INFO L231 Difference]: Finished difference. Result has 245 places, 539 transitions, 7852 flow [2024-06-21 20:59:29,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6816, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7852, PETRI_PLACES=245, PETRI_TRANSITIONS=539} [2024-06-21 20:59:29,638 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-21 20:59:29,638 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 539 transitions, 7852 flow [2024-06-21 20:59:29,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:29,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:29,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:59:29,639 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)] === [2024-06-21 20:59:29,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash -690370324, now seen corresponding path program 9 times [2024-06-21 20:59:29,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:29,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816037495] [2024-06-21 20:59:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:30,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:30,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816037495] [2024-06-21 20:59:30,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816037495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:30,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:30,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:30,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481469486] [2024-06-21 20:59:30,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:30,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:30,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:30,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:30,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 539 transitions, 7852 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:30,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:30,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:30,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:32,698 INFO L124 PetriNetUnfolderBase]: 4724/7282 cut-off events. [2024-06-21 20:59:32,698 INFO L125 PetriNetUnfolderBase]: For 598829/598841 co-relation queries the response was YES. [2024-06-21 20:59:32,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64360 conditions, 7282 events. 4724/7282 cut-off events. For 598829/598841 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41659 event pairs, 1348 based on Foata normal form. 16/7292 useless extension candidates. Maximal degree in co-relation 64243. Up to 6532 conditions per place. [2024-06-21 20:59:32,779 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 467 selfloop transitions, 109 changer transitions 0/583 dead transitions. [2024-06-21 20:59:32,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 583 transitions, 9283 flow [2024-06-21 20:59:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:59:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:59:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 20:59:32,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-21 20:59:32,780 INFO L175 Difference]: Start difference. First operand has 245 places, 539 transitions, 7852 flow. Second operand 11 states and 218 transitions. [2024-06-21 20:59:32,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 583 transitions, 9283 flow [2024-06-21 20:59:33,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 583 transitions, 9177 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 20:59:33,923 INFO L231 Difference]: Finished difference. Result has 254 places, 544 transitions, 8109 flow [2024-06-21 20:59:33,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7754, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8109, PETRI_PLACES=254, PETRI_TRANSITIONS=544} [2024-06-21 20:59:33,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-21 20:59:33,924 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 544 transitions, 8109 flow [2024-06-21 20:59:33,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:33,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:33,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:59:33,925 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)] === [2024-06-21 20:59:33,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash -690370169, now seen corresponding path program 3 times [2024-06-21 20:59:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:33,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319703829] [2024-06-21 20:59:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:34,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:34,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319703829] [2024-06-21 20:59:34,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319703829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:34,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:34,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889763704] [2024-06-21 20:59:34,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:35,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:35,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 544 transitions, 8109 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:35,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:35,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:35,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:36,996 INFO L124 PetriNetUnfolderBase]: 4850/7473 cut-off events. [2024-06-21 20:59:36,996 INFO L125 PetriNetUnfolderBase]: For 621614/621626 co-relation queries the response was YES. [2024-06-21 20:59:37,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66306 conditions, 7473 events. 4850/7473 cut-off events. For 621614/621626 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 43040 event pairs, 1320 based on Foata normal form. 14/7484 useless extension candidates. Maximal degree in co-relation 66186. Up to 6285 conditions per place. [2024-06-21 20:59:37,097 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 448 selfloop transitions, 170 changer transitions 0/625 dead transitions. [2024-06-21 20:59:37,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 625 transitions, 10085 flow [2024-06-21 20:59:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:59:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:59:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-21 20:59:37,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678030303030303 [2024-06-21 20:59:37,098 INFO L175 Difference]: Start difference. First operand has 254 places, 544 transitions, 8109 flow. Second operand 12 states and 247 transitions. [2024-06-21 20:59:37,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 625 transitions, 10085 flow [2024-06-21 20:59:38,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 625 transitions, 9839 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 20:59:38,383 INFO L231 Difference]: Finished difference. Result has 260 places, 572 transitions, 8588 flow [2024-06-21 20:59:38,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7863, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8588, PETRI_PLACES=260, PETRI_TRANSITIONS=572} [2024-06-21 20:59:38,383 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 215 predicate places. [2024-06-21 20:59:38,383 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 572 transitions, 8588 flow [2024-06-21 20:59:38,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:38,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:38,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:59:38,384 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)] === [2024-06-21 20:59:38,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash -684656249, now seen corresponding path program 4 times [2024-06-21 20:59:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409440084] [2024-06-21 20:59:38,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:38,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:39,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:39,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409440084] [2024-06-21 20:59:39,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409440084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:39,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:39,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456014618] [2024-06-21 20:59:39,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:39,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:39,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:39,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 572 transitions, 8588 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:39,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:39,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:41,554 INFO L124 PetriNetUnfolderBase]: 5005/7719 cut-off events. [2024-06-21 20:59:41,554 INFO L125 PetriNetUnfolderBase]: For 647869/647891 co-relation queries the response was YES. [2024-06-21 20:59:41,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69169 conditions, 7719 events. 5005/7719 cut-off events. For 647869/647891 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44844 event pairs, 1290 based on Foata normal form. 24/7739 useless extension candidates. Maximal degree in co-relation 69047. Up to 6533 conditions per place. [2024-06-21 20:59:41,644 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 466 selfloop transitions, 171 changer transitions 0/644 dead transitions. [2024-06-21 20:59:41,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 644 transitions, 10583 flow [2024-06-21 20:59:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:59:41,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-21 20:59:41,646 INFO L175 Difference]: Start difference. First operand has 260 places, 572 transitions, 8588 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:59:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 644 transitions, 10583 flow [2024-06-21 20:59:42,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 644 transitions, 10483 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:42,801 INFO L231 Difference]: Finished difference. Result has 268 places, 602 transitions, 9400 flow [2024-06-21 20:59:42,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8490, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9400, PETRI_PLACES=268, PETRI_TRANSITIONS=602} [2024-06-21 20:59:42,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-21 20:59:42,802 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 602 transitions, 9400 flow [2024-06-21 20:59:42,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:42,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:42,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:42,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:59:42,803 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)] === [2024-06-21 20:59:42,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash -684863639, now seen corresponding path program 5 times [2024-06-21 20:59:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:42,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320012375] [2024-06-21 20:59:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:42,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:43,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:43,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320012375] [2024-06-21 20:59:43,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320012375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:43,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:43,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:43,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462735538] [2024-06-21 20:59:43,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:43,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:43,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:43,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:43,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:44,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:44,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 602 transitions, 9400 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:44,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:44,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:44,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:46,198 INFO L124 PetriNetUnfolderBase]: 5008/7714 cut-off events. [2024-06-21 20:59:46,198 INFO L125 PetriNetUnfolderBase]: For 668131/668153 co-relation queries the response was YES. [2024-06-21 20:59:46,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70505 conditions, 7714 events. 5008/7714 cut-off events. For 668131/668153 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44745 event pairs, 1322 based on Foata normal form. 24/7737 useless extension candidates. Maximal degree in co-relation 70379. Up to 6522 conditions per place. [2024-06-21 20:59:46,295 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 474 selfloop transitions, 175 changer transitions 0/656 dead transitions. [2024-06-21 20:59:46,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 656 transitions, 11089 flow [2024-06-21 20:59:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:59:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:59:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-21 20:59:46,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-21 20:59:46,296 INFO L175 Difference]: Start difference. First operand has 268 places, 602 transitions, 9400 flow. Second operand 11 states and 225 transitions. [2024-06-21 20:59:46,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 656 transitions, 11089 flow [2024-06-21 20:59:47,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 656 transitions, 10854 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:47,709 INFO L231 Difference]: Finished difference. Result has 277 places, 610 transitions, 9742 flow [2024-06-21 20:59:47,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9742, PETRI_PLACES=277, PETRI_TRANSITIONS=610} [2024-06-21 20:59:47,710 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-21 20:59:47,710 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 610 transitions, 9742 flow [2024-06-21 20:59:47,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:47,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:47,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:47,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:59:47,710 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:47,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1810275390, now seen corresponding path program 10 times [2024-06-21 20:59:47,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:47,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041264388] [2024-06-21 20:59:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:47,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:48,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041264388] [2024-06-21 20:59:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041264388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:48,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:48,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100435730] [2024-06-21 20:59:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:49,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:49,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 610 transitions, 9742 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:49,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:49,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:49,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:50,904 INFO L124 PetriNetUnfolderBase]: 5011/7723 cut-off events. [2024-06-21 20:59:50,904 INFO L125 PetriNetUnfolderBase]: For 690699/690721 co-relation queries the response was YES. [2024-06-21 20:59:50,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71056 conditions, 7723 events. 5011/7723 cut-off events. For 690699/690721 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44810 event pairs, 1361 based on Foata normal form. 26/7748 useless extension candidates. Maximal degree in co-relation 70927. Up to 6981 conditions per place. [2024-06-21 20:59:51,017 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 534 selfloop transitions, 104 changer transitions 0/645 dead transitions. [2024-06-21 20:59:51,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 645 transitions, 11210 flow [2024-06-21 20:59:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:59:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:59:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:59:51,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-21 20:59:51,018 INFO L175 Difference]: Start difference. First operand has 277 places, 610 transitions, 9742 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:59:51,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 645 transitions, 11210 flow [2024-06-21 20:59:52,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 645 transitions, 10888 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:52,518 INFO L231 Difference]: Finished difference. Result has 282 places, 612 transitions, 9693 flow [2024-06-21 20:59:52,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9420, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9693, PETRI_PLACES=282, PETRI_TRANSITIONS=612} [2024-06-21 20:59:52,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-21 20:59:52,519 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 612 transitions, 9693 flow [2024-06-21 20:59:52,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:52,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:52,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:52,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:59:52,519 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:52,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 608445593, now seen corresponding path program 3 times [2024-06-21 20:59:52,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:52,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226357762] [2024-06-21 20:59:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:53,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226357762] [2024-06-21 20:59:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226357762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:53,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:53,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:53,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416454776] [2024-06-21 20:59:53,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:53,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:53,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:53,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:59:53,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 612 transitions, 9693 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:53,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:53,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:59:53,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:55,109 INFO L124 PetriNetUnfolderBase]: 5222/8002 cut-off events. [2024-06-21 20:59:55,109 INFO L125 PetriNetUnfolderBase]: For 725200/725226 co-relation queries the response was YES. [2024-06-21 20:59:55,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72569 conditions, 8002 events. 5222/8002 cut-off events. For 725200/725226 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45788 event pairs, 1528 based on Foata normal form. 27/8016 useless extension candidates. Maximal degree in co-relation 72439. Up to 7083 conditions per place. [2024-06-21 20:59:55,218 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 483 selfloop transitions, 68 changer transitions 0/633 dead transitions. [2024-06-21 20:59:55,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 633 transitions, 11104 flow [2024-06-21 20:59:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 20:59:55,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 20:59:55,219 INFO L175 Difference]: Start difference. First operand has 282 places, 612 transitions, 9693 flow. Second operand 8 states and 158 transitions. [2024-06-21 20:59:55,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 633 transitions, 11104 flow [2024-06-21 20:59:56,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 633 transitions, 10835 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:56,771 INFO L231 Difference]: Finished difference. Result has 282 places, 612 transitions, 9568 flow [2024-06-21 20:59:56,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9424, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9568, PETRI_PLACES=282, PETRI_TRANSITIONS=612} [2024-06-21 20:59:56,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-21 20:59:56,772 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 612 transitions, 9568 flow [2024-06-21 20:59:56,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:56,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:56,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:56,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:59:56,773 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:59:56,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash 608446027, now seen corresponding path program 1 times [2024-06-21 20:59:56,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:56,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129715381] [2024-06-21 20:59:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:56,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:57,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:57,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129715381] [2024-06-21 20:59:57,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129715381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:57,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:57,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:59:57,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612526332] [2024-06-21 20:59:57,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:59:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:59:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:59:57,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 20:59:57,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 612 transitions, 9568 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:57,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:57,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 20:59:57,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:59,316 INFO L124 PetriNetUnfolderBase]: 5424/8209 cut-off events. [2024-06-21 20:59:59,317 INFO L125 PetriNetUnfolderBase]: For 744214/744220 co-relation queries the response was YES. [2024-06-21 20:59:59,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73696 conditions, 8209 events. 5424/8209 cut-off events. For 744214/744220 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46081 event pairs, 1821 based on Foata normal form. 7/8207 useless extension candidates. Maximal degree in co-relation 73566. Up to 7640 conditions per place. [2024-06-21 20:59:59,428 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 529 selfloop transitions, 30 changer transitions 0/639 dead transitions. [2024-06-21 20:59:59,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 639 transitions, 11006 flow [2024-06-21 20:59:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 20:59:59,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 20:59:59,429 INFO L175 Difference]: Start difference. First operand has 282 places, 612 transitions, 9568 flow. Second operand 8 states and 144 transitions. [2024-06-21 20:59:59,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 639 transitions, 11006 flow [2024-06-21 21:00:01,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 639 transitions, 10896 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:00:01,039 INFO L231 Difference]: Finished difference. Result has 287 places, 620 transitions, 9679 flow [2024-06-21 21:00:01,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9459, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9679, PETRI_PLACES=287, PETRI_TRANSITIONS=620} [2024-06-21 21:00:01,040 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-21 21:00:01,041 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 620 transitions, 9679 flow [2024-06-21 21:00:01,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:01,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:01,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:01,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:00:01,041 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:01,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1375289610, now seen corresponding path program 11 times [2024-06-21 21:00:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:01,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255654695] [2024-06-21 21:00:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:02,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:02,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255654695] [2024-06-21 21:00:02,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255654695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:02,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:02,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:02,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657533985] [2024-06-21 21:00:02,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:02,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:02,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:02,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:02,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:02,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 620 transitions, 9679 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:02,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:02,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:02,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:04,144 INFO L124 PetriNetUnfolderBase]: 5049/7752 cut-off events. [2024-06-21 21:00:04,145 INFO L125 PetriNetUnfolderBase]: For 758404/758436 co-relation queries the response was YES. [2024-06-21 21:00:04,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72012 conditions, 7752 events. 5049/7752 cut-off events. For 758404/758436 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44914 event pairs, 1035 based on Foata normal form. 34/7774 useless extension candidates. Maximal degree in co-relation 71880. Up to 5611 conditions per place. [2024-06-21 21:00:04,257 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 358 selfloop transitions, 294 changer transitions 0/661 dead transitions. [2024-06-21 21:00:04,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 661 transitions, 11437 flow [2024-06-21 21:00:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 21:00:04,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 21:00:04,258 INFO L175 Difference]: Start difference. First operand has 287 places, 620 transitions, 9679 flow. Second operand 9 states and 183 transitions. [2024-06-21 21:00:04,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 661 transitions, 11437 flow [2024-06-21 21:00:05,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 661 transitions, 11374 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 21:00:05,755 INFO L231 Difference]: Finished difference. Result has 294 places, 624 transitions, 10308 flow [2024-06-21 21:00:05,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9616, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10308, PETRI_PLACES=294, PETRI_TRANSITIONS=624} [2024-06-21 21:00:05,755 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-21 21:00:05,755 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 624 transitions, 10308 flow [2024-06-21 21:00:05,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:05,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:05,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:05,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:00:05,756 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:05,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1377163560, now seen corresponding path program 12 times [2024-06-21 21:00:05,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:05,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083874497] [2024-06-21 21:00:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:05,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:06,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:06,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083874497] [2024-06-21 21:00:06,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083874497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:06,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:06,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946614073] [2024-06-21 21:00:06,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:06,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:06,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:06,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:07,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:07,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 624 transitions, 10308 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:07,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:07,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:07,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:08,701 INFO L124 PetriNetUnfolderBase]: 5195/8000 cut-off events. [2024-06-21 21:00:08,701 INFO L125 PetriNetUnfolderBase]: For 806017/806049 co-relation queries the response was YES. [2024-06-21 21:00:08,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76120 conditions, 8000 events. 5195/8000 cut-off events. For 806017/806049 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 46844 event pairs, 1310 based on Foata normal form. 36/8031 useless extension candidates. Maximal degree in co-relation 75986. Up to 6660 conditions per place. [2024-06-21 21:00:08,818 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 434 selfloop transitions, 236 changer transitions 0/679 dead transitions. [2024-06-21 21:00:08,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 679 transitions, 12443 flow [2024-06-21 21:00:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:08,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 21:00:08,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 21:00:08,819 INFO L175 Difference]: Start difference. First operand has 294 places, 624 transitions, 10308 flow. Second operand 9 states and 183 transitions. [2024-06-21 21:00:08,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 679 transitions, 12443 flow [2024-06-21 21:00:10,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 679 transitions, 11902 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:10,867 INFO L231 Difference]: Finished difference. Result has 297 places, 644 transitions, 10752 flow [2024-06-21 21:00:10,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9795, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10752, PETRI_PLACES=297, PETRI_TRANSITIONS=644} [2024-06-21 21:00:10,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-21 21:00:10,868 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 644 transitions, 10752 flow [2024-06-21 21:00:10,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:10,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:10,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:10,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:00:10,868 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:10,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:10,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1377167280, now seen corresponding path program 13 times [2024-06-21 21:00:10,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:10,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121150589] [2024-06-21 21:00:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:10,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:12,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:12,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121150589] [2024-06-21 21:00:12,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121150589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:12,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:12,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:12,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358957741] [2024-06-21 21:00:12,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:12,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:12,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:12,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 644 transitions, 10752 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:12,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:12,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:12,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:13,907 INFO L124 PetriNetUnfolderBase]: 5177/7975 cut-off events. [2024-06-21 21:00:13,907 INFO L125 PetriNetUnfolderBase]: For 770524/770556 co-relation queries the response was YES. [2024-06-21 21:00:13,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75075 conditions, 7975 events. 5177/7975 cut-off events. For 770524/770556 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46697 event pairs, 1357 based on Foata normal form. 36/8006 useless extension candidates. Maximal degree in co-relation 74940. Up to 6852 conditions per place. [2024-06-21 21:00:14,017 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 453 selfloop transitions, 215 changer transitions 0/677 dead transitions. [2024-06-21 21:00:14,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 677 transitions, 12252 flow [2024-06-21 21:00:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 21:00:14,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 21:00:14,018 INFO L175 Difference]: Start difference. First operand has 297 places, 644 transitions, 10752 flow. Second operand 9 states and 179 transitions. [2024-06-21 21:00:14,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 677 transitions, 12252 flow [2024-06-21 21:00:15,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 677 transitions, 11909 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:15,863 INFO L231 Difference]: Finished difference. Result has 301 places, 644 transitions, 10861 flow [2024-06-21 21:00:15,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10409, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10861, PETRI_PLACES=301, PETRI_TRANSITIONS=644} [2024-06-21 21:00:15,863 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-21 21:00:15,864 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 644 transitions, 10861 flow [2024-06-21 21:00:15,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:15,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:15,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:15,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:00:15,864 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:15,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1377167435, now seen corresponding path program 6 times [2024-06-21 21:00:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:15,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882116019] [2024-06-21 21:00:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:17,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882116019] [2024-06-21 21:00:17,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882116019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:17,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:17,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61541848] [2024-06-21 21:00:17,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:17,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:17,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:17,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:17,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:17,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 644 transitions, 10861 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:17,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:17,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:17,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:19,456 INFO L124 PetriNetUnfolderBase]: 5253/8108 cut-off events. [2024-06-21 21:00:19,456 INFO L125 PetriNetUnfolderBase]: For 801038/801070 co-relation queries the response was YES. [2024-06-21 21:00:19,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77043 conditions, 8108 events. 5253/8108 cut-off events. For 801038/801070 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47862 event pairs, 1323 based on Foata normal form. 36/8140 useless extension candidates. Maximal degree in co-relation 76906. Up to 5994 conditions per place. [2024-06-21 21:00:19,555 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 352 selfloop transitions, 356 changer transitions 0/717 dead transitions. [2024-06-21 21:00:19,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 717 transitions, 13178 flow [2024-06-21 21:00:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:00:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:00:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-21 21:00:19,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:00:19,556 INFO L175 Difference]: Start difference. First operand has 301 places, 644 transitions, 10861 flow. Second operand 12 states and 242 transitions. [2024-06-21 21:00:19,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 717 transitions, 13178 flow [2024-06-21 21:00:21,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 717 transitions, 12728 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:21,035 INFO L231 Difference]: Finished difference. Result has 305 places, 659 transitions, 11463 flow [2024-06-21 21:00:21,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10411, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11463, PETRI_PLACES=305, PETRI_TRANSITIONS=659} [2024-06-21 21:00:21,036 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-21 21:00:21,036 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 659 transitions, 11463 flow [2024-06-21 21:00:21,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:21,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:21,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:21,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:00:21,037 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:21,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1703616556, now seen corresponding path program 14 times [2024-06-21 21:00:21,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:21,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82243543] [2024-06-21 21:00:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82243543] [2024-06-21 21:00:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82243543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:22,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980303562] [2024-06-21 21:00:22,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:22,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:22,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:22,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:22,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 659 transitions, 11463 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:22,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:22,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:22,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:24,482 INFO L124 PetriNetUnfolderBase]: 5331/8229 cut-off events. [2024-06-21 21:00:24,482 INFO L125 PetriNetUnfolderBase]: For 833312/833334 co-relation queries the response was YES. [2024-06-21 21:00:24,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79275 conditions, 8229 events. 5331/8229 cut-off events. For 833312/833334 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 48643 event pairs, 1449 based on Foata normal form. 30/8248 useless extension candidates. Maximal degree in co-relation 79137. Up to 7397 conditions per place. [2024-06-21 21:00:24,596 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 571 selfloop transitions, 123 changer transitions 0/703 dead transitions. [2024-06-21 21:00:24,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 703 transitions, 13335 flow [2024-06-21 21:00:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 21:00:24,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:00:24,597 INFO L175 Difference]: Start difference. First operand has 305 places, 659 transitions, 11463 flow. Second operand 9 states and 176 transitions. [2024-06-21 21:00:24,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 703 transitions, 13335 flow [2024-06-21 21:00:26,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 703 transitions, 12866 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:26,283 INFO L231 Difference]: Finished difference. Result has 306 places, 671 transitions, 11566 flow [2024-06-21 21:00:26,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10994, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11566, PETRI_PLACES=306, PETRI_TRANSITIONS=671} [2024-06-21 21:00:26,284 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-21 21:00:26,284 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 671 transitions, 11566 flow [2024-06-21 21:00:26,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:26,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:26,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:26,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:00:26,285 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:26,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:26,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1463859090, now seen corresponding path program 15 times [2024-06-21 21:00:26,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:26,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717716910] [2024-06-21 21:00:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:26,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:27,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:27,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717716910] [2024-06-21 21:00:27,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717716910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:27,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:27,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:27,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538554082] [2024-06-21 21:00:27,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:27,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:27,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:27,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:27,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:27,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:27,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 671 transitions, 11566 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:27,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:27,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:29,530 INFO L124 PetriNetUnfolderBase]: 5381/8309 cut-off events. [2024-06-21 21:00:29,531 INFO L125 PetriNetUnfolderBase]: For 856885/856907 co-relation queries the response was YES. [2024-06-21 21:00:29,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80349 conditions, 8309 events. 5381/8309 cut-off events. For 856885/856907 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 49219 event pairs, 1473 based on Foata normal form. 30/8333 useless extension candidates. Maximal degree in co-relation 80209. Up to 7422 conditions per place. [2024-06-21 21:00:29,653 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 561 selfloop transitions, 142 changer transitions 0/712 dead transitions. [2024-06-21 21:00:29,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 712 transitions, 13395 flow [2024-06-21 21:00:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 21:00:29,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 21:00:29,654 INFO L175 Difference]: Start difference. First operand has 306 places, 671 transitions, 11566 flow. Second operand 9 states and 177 transitions. [2024-06-21 21:00:29,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 712 transitions, 13395 flow [2024-06-21 21:00:31,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 712 transitions, 13061 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:31,953 INFO L231 Difference]: Finished difference. Result has 308 places, 679 transitions, 11758 flow [2024-06-21 21:00:31,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11232, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11758, PETRI_PLACES=308, PETRI_TRANSITIONS=679} [2024-06-21 21:00:31,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-21 21:00:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 679 transitions, 11758 flow [2024-06-21 21:00:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:31,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:31,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:00:31,954 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:31,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1463855370, now seen corresponding path program 16 times [2024-06-21 21:00:31,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:31,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477594942] [2024-06-21 21:00:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:31,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:33,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:33,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477594942] [2024-06-21 21:00:33,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477594942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:33,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:33,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986399618] [2024-06-21 21:00:33,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:33,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:33,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 679 transitions, 11758 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:33,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:33,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:33,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:35,125 INFO L124 PetriNetUnfolderBase]: 5431/8383 cut-off events. [2024-06-21 21:00:35,125 INFO L125 PetriNetUnfolderBase]: For 883302/883324 co-relation queries the response was YES. [2024-06-21 21:00:35,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81406 conditions, 8383 events. 5431/8383 cut-off events. For 883302/883324 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49714 event pairs, 1447 based on Foata normal form. 30/8407 useless extension candidates. Maximal degree in co-relation 81265. Up to 7262 conditions per place. [2024-06-21 21:00:35,249 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 539 selfloop transitions, 172 changer transitions 0/720 dead transitions. [2024-06-21 21:00:35,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 720 transitions, 13600 flow [2024-06-21 21:00:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 21:00:35,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 21:00:35,250 INFO L175 Difference]: Start difference. First operand has 308 places, 679 transitions, 11758 flow. Second operand 9 states and 178 transitions. [2024-06-21 21:00:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 720 transitions, 13600 flow [2024-06-21 21:00:37,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 720 transitions, 13172 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:37,731 INFO L231 Difference]: Finished difference. Result has 309 places, 687 transitions, 11930 flow [2024-06-21 21:00:37,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11330, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11930, PETRI_PLACES=309, PETRI_TRANSITIONS=687} [2024-06-21 21:00:37,731 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-21 21:00:37,732 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 687 transitions, 11930 flow [2024-06-21 21:00:37,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:37,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:37,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:00:37,732 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:37,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -732426325, now seen corresponding path program 4 times [2024-06-21 21:00:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:37,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116308531] [2024-06-21 21:00:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:37,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:38,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:38,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116308531] [2024-06-21 21:00:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116308531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:38,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:38,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:00:38,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965227034] [2024-06-21 21:00:38,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:38,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:00:38,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:00:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:00:38,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:38,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 687 transitions, 11930 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:38,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:38,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:38,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:40,688 INFO L124 PetriNetUnfolderBase]: 5641/8671 cut-off events. [2024-06-21 21:00:40,688 INFO L125 PetriNetUnfolderBase]: For 914480/914496 co-relation queries the response was YES. [2024-06-21 21:00:40,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83164 conditions, 8671 events. 5641/8671 cut-off events. For 914480/914496 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 50766 event pairs, 1647 based on Foata normal form. 17/8672 useless extension candidates. Maximal degree in co-relation 83023. Up to 7599 conditions per place. [2024-06-21 21:00:40,800 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 519 selfloop transitions, 83 changer transitions 0/712 dead transitions. [2024-06-21 21:00:40,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 712 transitions, 13541 flow [2024-06-21 21:00:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:00:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:00:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 21:00:40,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-21 21:00:40,801 INFO L175 Difference]: Start difference. First operand has 309 places, 687 transitions, 11930 flow. Second operand 7 states and 144 transitions. [2024-06-21 21:00:40,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 712 transitions, 13541 flow [2024-06-21 21:00:42,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 712 transitions, 13075 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:42,743 INFO L231 Difference]: Finished difference. Result has 309 places, 691 transitions, 11715 flow [2024-06-21 21:00:42,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11464, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11715, PETRI_PLACES=309, PETRI_TRANSITIONS=691} [2024-06-21 21:00:42,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-21 21:00:42,744 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 691 transitions, 11715 flow [2024-06-21 21:00:42,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:42,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:42,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:42,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:00:42,745 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:42,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash -64967660, now seen corresponding path program 17 times [2024-06-21 21:00:42,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:42,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247536532] [2024-06-21 21:00:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:42,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:43,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:43,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247536532] [2024-06-21 21:00:43,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247536532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:43,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:43,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:43,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580216776] [2024-06-21 21:00:43,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:43,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:43,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:44,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:44,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 691 transitions, 11715 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:44,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:44,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:44,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:46,280 INFO L124 PetriNetUnfolderBase]: 5491/8482 cut-off events. [2024-06-21 21:00:46,280 INFO L125 PetriNetUnfolderBase]: For 930553/930575 co-relation queries the response was YES. [2024-06-21 21:00:46,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82241 conditions, 8482 events. 5491/8482 cut-off events. For 930553/930575 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 50576 event pairs, 1161 based on Foata normal form. 28/8500 useless extension candidates. Maximal degree in co-relation 82099. Up to 7098 conditions per place. [2024-06-21 21:00:46,409 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 515 selfloop transitions, 214 changer transitions 0/738 dead transitions. [2024-06-21 21:00:46,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 738 transitions, 13845 flow [2024-06-21 21:00:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 21:00:46,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-21 21:00:46,411 INFO L175 Difference]: Start difference. First operand has 309 places, 691 transitions, 11715 flow. Second operand 9 states and 188 transitions. [2024-06-21 21:00:46,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 738 transitions, 13845 flow [2024-06-21 21:00:48,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 738 transitions, 13683 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:00:48,330 INFO L231 Difference]: Finished difference. Result has 313 places, 699 transitions, 12241 flow [2024-06-21 21:00:48,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11557, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12241, PETRI_PLACES=313, PETRI_TRANSITIONS=699} [2024-06-21 21:00:48,331 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-21 21:00:48,332 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 699 transitions, 12241 flow [2024-06-21 21:00:48,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:48,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:48,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:48,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:00:48,332 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:48,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:48,333 INFO L85 PathProgramCache]: Analyzing trace with hash -64963940, now seen corresponding path program 18 times [2024-06-21 21:00:48,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:48,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48664401] [2024-06-21 21:00:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:48,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:49,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:49,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48664401] [2024-06-21 21:00:49,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48664401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:49,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:49,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390810018] [2024-06-21 21:00:49,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:49,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:49,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:49,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 699 transitions, 12241 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:49,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:49,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:51,726 INFO L124 PetriNetUnfolderBase]: 5569/8588 cut-off events. [2024-06-21 21:00:51,727 INFO L125 PetriNetUnfolderBase]: For 914123/914145 co-relation queries the response was YES. [2024-06-21 21:00:51,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83749 conditions, 8588 events. 5569/8588 cut-off events. For 914123/914145 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 51166 event pairs, 1457 based on Foata normal form. 28/8606 useless extension candidates. Maximal degree in co-relation 83607. Up to 7615 conditions per place. [2024-06-21 21:00:51,857 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 558 selfloop transitions, 180 changer transitions 0/747 dead transitions. [2024-06-21 21:00:51,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 747 transitions, 14244 flow [2024-06-21 21:00:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 21:00:51,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 21:00:51,859 INFO L175 Difference]: Start difference. First operand has 313 places, 699 transitions, 12241 flow. Second operand 9 states and 184 transitions. [2024-06-21 21:00:51,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 747 transitions, 14244 flow [2024-06-21 21:00:54,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 747 transitions, 13308 flow, removed 96 selfloop flow, removed 9 redundant places. [2024-06-21 21:00:54,184 INFO L231 Difference]: Finished difference. Result has 313 places, 711 transitions, 12039 flow [2024-06-21 21:00:54,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11349, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12039, PETRI_PLACES=313, PETRI_TRANSITIONS=711} [2024-06-21 21:00:54,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-21 21:00:54,185 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 711 transitions, 12039 flow [2024-06-21 21:00:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:54,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:54,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:54,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:00:54,185 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:54,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:54,186 INFO L85 PathProgramCache]: Analyzing trace with hash -64963785, now seen corresponding path program 7 times [2024-06-21 21:00:54,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:54,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472996142] [2024-06-21 21:00:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:54,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:55,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:55,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472996142] [2024-06-21 21:00:55,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472996142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:55,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:55,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910306437] [2024-06-21 21:00:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:55,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:55,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:00:55,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 711 transitions, 12039 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:55,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:55,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:00:55,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:57,748 INFO L124 PetriNetUnfolderBase]: 5619/8669 cut-off events. [2024-06-21 21:00:57,748 INFO L125 PetriNetUnfolderBase]: For 904947/904969 co-relation queries the response was YES. [2024-06-21 21:00:57,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82846 conditions, 8669 events. 5619/8669 cut-off events. For 904947/904969 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 51811 event pairs, 1405 based on Foata normal form. 26/8689 useless extension candidates. Maximal degree in co-relation 82705. Up to 6816 conditions per place. [2024-06-21 21:00:57,863 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 453 selfloop transitions, 318 changer transitions 0/780 dead transitions. [2024-06-21 21:00:57,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 780 transitions, 14403 flow [2024-06-21 21:00:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:00:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:00:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 21:00:57,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-21 21:00:57,865 INFO L175 Difference]: Start difference. First operand has 313 places, 711 transitions, 12039 flow. Second operand 11 states and 229 transitions. [2024-06-21 21:00:57,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 780 transitions, 14403 flow [2024-06-21 21:00:59,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 780 transitions, 13931 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:59,928 INFO L231 Difference]: Finished difference. Result has 317 places, 720 transitions, 12407 flow [2024-06-21 21:00:59,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11567, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12407, PETRI_PLACES=317, PETRI_TRANSITIONS=720} [2024-06-21 21:00:59,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-21 21:00:59,929 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 720 transitions, 12407 flow [2024-06-21 21:00:59,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:59,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:59,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:59,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:00:59,930 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:59,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:59,930 INFO L85 PathProgramCache]: Analyzing trace with hash -59457410, now seen corresponding path program 19 times [2024-06-21 21:00:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:59,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575034845] [2024-06-21 21:00:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:01,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:01,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575034845] [2024-06-21 21:01:01,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575034845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:01,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:01,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:01,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16059208] [2024-06-21 21:01:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:01,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:01,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:01,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:01,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:01,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:01,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 720 transitions, 12407 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:01,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:01,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:01,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:03,259 INFO L124 PetriNetUnfolderBase]: 5680/8773 cut-off events. [2024-06-21 21:01:03,259 INFO L125 PetriNetUnfolderBase]: For 944071/944093 co-relation queries the response was YES. [2024-06-21 21:01:03,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84629 conditions, 8773 events. 5680/8773 cut-off events. For 944071/944093 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 52611 event pairs, 1522 based on Foata normal form. 32/8799 useless extension candidates. Maximal degree in co-relation 84487. Up to 7922 conditions per place. [2024-06-21 21:01:03,372 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 625 selfloop transitions, 128 changer transitions 0/762 dead transitions. [2024-06-21 21:01:03,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 762 transitions, 14402 flow [2024-06-21 21:01:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 21:01:03,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-21 21:01:03,374 INFO L175 Difference]: Start difference. First operand has 317 places, 720 transitions, 12407 flow. Second operand 9 states and 175 transitions. [2024-06-21 21:01:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 762 transitions, 14402 flow [2024-06-21 21:01:05,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 762 transitions, 13652 flow, removed 49 selfloop flow, removed 10 redundant places. [2024-06-21 21:01:05,672 INFO L231 Difference]: Finished difference. Result has 316 places, 730 transitions, 12248 flow [2024-06-21 21:01:05,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11657, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12248, PETRI_PLACES=316, PETRI_TRANSITIONS=730} [2024-06-21 21:01:05,673 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-21 21:01:05,673 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 730 transitions, 12248 flow [2024-06-21 21:01:05,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:05,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:05,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:05,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:01:05,674 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:05,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:05,674 INFO L85 PathProgramCache]: Analyzing trace with hash -59249865, now seen corresponding path program 8 times [2024-06-21 21:01:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:05,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614198117] [2024-06-21 21:01:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:05,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:06,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614198117] [2024-06-21 21:01:06,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614198117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:06,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:06,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:06,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026305429] [2024-06-21 21:01:06,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:06,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:06,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:06,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 730 transitions, 12248 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:06,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:06,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:06,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:09,060 INFO L124 PetriNetUnfolderBase]: 5756/8901 cut-off events. [2024-06-21 21:01:09,061 INFO L125 PetriNetUnfolderBase]: For 938510/938532 co-relation queries the response was YES. [2024-06-21 21:01:09,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84535 conditions, 8901 events. 5756/8901 cut-off events. For 938510/938532 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 53589 event pairs, 1469 based on Foata normal form. 30/8930 useless extension candidates. Maximal degree in co-relation 84393. Up to 7436 conditions per place. [2024-06-21 21:01:09,180 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 536 selfloop transitions, 246 changer transitions 0/791 dead transitions. [2024-06-21 21:01:09,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 791 transitions, 14710 flow [2024-06-21 21:01:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 21:01:09,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-21 21:01:09,181 INFO L175 Difference]: Start difference. First operand has 316 places, 730 transitions, 12248 flow. Second operand 9 states and 185 transitions. [2024-06-21 21:01:09,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 791 transitions, 14710 flow [2024-06-21 21:01:11,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 791 transitions, 14293 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:11,420 INFO L231 Difference]: Finished difference. Result has 319 places, 747 transitions, 12836 flow [2024-06-21 21:01:11,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11835, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12836, PETRI_PLACES=319, PETRI_TRANSITIONS=747} [2024-06-21 21:01:11,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-21 21:01:11,421 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 747 transitions, 12836 flow [2024-06-21 21:01:11,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:11,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:11,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:01:11,421 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:11,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash 95356411, now seen corresponding path program 9 times [2024-06-21 21:01:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:11,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000750638] [2024-06-21 21:01:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:12,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:12,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000750638] [2024-06-21 21:01:12,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000750638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:12,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:12,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:12,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525805290] [2024-06-21 21:01:12,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:12,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:12,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:12,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:12,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 747 transitions, 12836 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:12,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:12,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:12,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:14,912 INFO L124 PetriNetUnfolderBase]: 5934/9163 cut-off events. [2024-06-21 21:01:14,912 INFO L125 PetriNetUnfolderBase]: For 964238/964260 co-relation queries the response was YES. [2024-06-21 21:01:14,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88286 conditions, 9163 events. 5934/9163 cut-off events. For 964238/964260 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 55346 event pairs, 1465 based on Foata normal form. 30/9192 useless extension candidates. Maximal degree in co-relation 88142. Up to 7497 conditions per place. [2024-06-21 21:01:15,033 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 532 selfloop transitions, 283 changer transitions 0/824 dead transitions. [2024-06-21 21:01:15,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 824 transitions, 15900 flow [2024-06-21 21:01:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 21:01:15,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 21:01:15,034 INFO L175 Difference]: Start difference. First operand has 319 places, 747 transitions, 12836 flow. Second operand 9 states and 190 transitions. [2024-06-21 21:01:15,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 824 transitions, 15900 flow [2024-06-21 21:01:17,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 824 transitions, 15368 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:17,342 INFO L231 Difference]: Finished difference. Result has 322 places, 774 transitions, 13504 flow [2024-06-21 21:01:17,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12324, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13504, PETRI_PLACES=322, PETRI_TRANSITIONS=774} [2024-06-21 21:01:17,342 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-21 21:01:17,342 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 774 transitions, 13504 flow [2024-06-21 21:01:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:17,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:17,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:01:17,343 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:17,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash -59451675, now seen corresponding path program 10 times [2024-06-21 21:01:17,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:17,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872334467] [2024-06-21 21:01:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:17,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:18,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:18,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872334467] [2024-06-21 21:01:18,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872334467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:18,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:18,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:18,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600856063] [2024-06-21 21:01:18,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:18,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:18,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:18,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 774 transitions, 13504 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:18,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:18,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:18,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:20,896 INFO L124 PetriNetUnfolderBase]: 5906/9121 cut-off events. [2024-06-21 21:01:20,896 INFO L125 PetriNetUnfolderBase]: For 947003/947025 co-relation queries the response was YES. [2024-06-21 21:01:20,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87346 conditions, 9121 events. 5906/9121 cut-off events. For 947003/947025 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 55109 event pairs, 1481 based on Foata normal form. 30/9150 useless extension candidates. Maximal degree in co-relation 87201. Up to 7652 conditions per place. [2024-06-21 21:01:21,019 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 572 selfloop transitions, 242 changer transitions 0/823 dead transitions. [2024-06-21 21:01:21,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 823 transitions, 15745 flow [2024-06-21 21:01:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 21:01:21,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 21:01:21,020 INFO L175 Difference]: Start difference. First operand has 322 places, 774 transitions, 13504 flow. Second operand 9 states and 187 transitions. [2024-06-21 21:01:21,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 823 transitions, 15745 flow [2024-06-21 21:01:23,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 823 transitions, 15247 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:23,465 INFO L231 Difference]: Finished difference. Result has 326 places, 774 transitions, 13514 flow [2024-06-21 21:01:23,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13006, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13514, PETRI_PLACES=326, PETRI_TRANSITIONS=774} [2024-06-21 21:01:23,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-21 21:01:23,466 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 774 transitions, 13514 flow [2024-06-21 21:01:23,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:23,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:23,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:23,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:01:23,466 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:23,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash -64819790, now seen corresponding path program 20 times [2024-06-21 21:01:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:23,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672205011] [2024-06-21 21:01:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:23,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:24,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:24,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672205011] [2024-06-21 21:01:24,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672205011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:24,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:24,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:24,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564753639] [2024-06-21 21:01:24,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:24,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:24,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:24,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:24,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 774 transitions, 13514 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:24,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:24,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:24,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:26,982 INFO L124 PetriNetUnfolderBase]: 5944/9174 cut-off events. [2024-06-21 21:01:26,982 INFO L125 PetriNetUnfolderBase]: For 970927/970939 co-relation queries the response was YES. [2024-06-21 21:01:27,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88874 conditions, 9174 events. 5944/9174 cut-off events. For 970927/970939 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 55476 event pairs, 1590 based on Foata normal form. 20/9182 useless extension candidates. Maximal degree in co-relation 88727. Up to 8320 conditions per place. [2024-06-21 21:01:27,108 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 676 selfloop transitions, 131 changer transitions 0/816 dead transitions. [2024-06-21 21:01:27,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 816 transitions, 15581 flow [2024-06-21 21:01:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:27,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 21:01:27,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 21:01:27,109 INFO L175 Difference]: Start difference. First operand has 326 places, 774 transitions, 13514 flow. Second operand 9 states and 179 transitions. [2024-06-21 21:01:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 816 transitions, 15581 flow [2024-06-21 21:01:29,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 816 transitions, 15006 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:29,648 INFO L231 Difference]: Finished difference. Result has 327 places, 782 transitions, 13487 flow [2024-06-21 21:01:29,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12939, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13487, PETRI_PLACES=327, PETRI_TRANSITIONS=782} [2024-06-21 21:01:29,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-21 21:01:29,649 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 782 transitions, 13487 flow [2024-06-21 21:01:29,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:29,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:29,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:29,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:01:29,649 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:29,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -732068275, now seen corresponding path program 5 times [2024-06-21 21:01:29,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:29,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493943312] [2024-06-21 21:01:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:29,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:30,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:30,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493943312] [2024-06-21 21:01:30,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493943312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:30,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:30,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:01:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797355498] [2024-06-21 21:01:30,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:30,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:01:30,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:01:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:01:30,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:30,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 782 transitions, 13487 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:30,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:30,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:30,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:32,930 INFO L124 PetriNetUnfolderBase]: 6221/9586 cut-off events. [2024-06-21 21:01:32,931 INFO L125 PetriNetUnfolderBase]: For 1009933/1009965 co-relation queries the response was YES. [2024-06-21 21:01:33,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91015 conditions, 9586 events. 6221/9586 cut-off events. For 1009933/1009965 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57580 event pairs, 1803 based on Foata normal form. 28/9594 useless extension candidates. Maximal degree in co-relation 90867. Up to 8421 conditions per place. [2024-06-21 21:01:33,057 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 597 selfloop transitions, 80 changer transitions 0/806 dead transitions. [2024-06-21 21:01:33,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 806 transitions, 15310 flow [2024-06-21 21:01:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 21:01:33,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 21:01:33,058 INFO L175 Difference]: Start difference. First operand has 327 places, 782 transitions, 13487 flow. Second operand 7 states and 138 transitions. [2024-06-21 21:01:33,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 806 transitions, 15310 flow [2024-06-21 21:01:35,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 806 transitions, 14896 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:35,942 INFO L231 Difference]: Finished difference. Result has 328 places, 790 transitions, 13425 flow [2024-06-21 21:01:35,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13073, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13425, PETRI_PLACES=328, PETRI_TRANSITIONS=790} [2024-06-21 21:01:35,942 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-21 21:01:35,942 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 790 transitions, 13425 flow [2024-06-21 21:01:35,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:35,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:35,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:35,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:01:35,943 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:35,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash -732067841, now seen corresponding path program 2 times [2024-06-21 21:01:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:35,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033908522] [2024-06-21 21:01:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:35,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:36,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:36,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033908522] [2024-06-21 21:01:36,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033908522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:36,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:36,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:01:36,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443887077] [2024-06-21 21:01:36,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:01:36,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:01:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:01:36,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:36,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 790 transitions, 13425 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:36,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:36,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:39,172 INFO L124 PetriNetUnfolderBase]: 6403/9778 cut-off events. [2024-06-21 21:01:39,172 INFO L125 PetriNetUnfolderBase]: For 1028831/1028841 co-relation queries the response was YES. [2024-06-21 21:01:39,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91948 conditions, 9778 events. 6403/9778 cut-off events. For 1028831/1028841 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 57975 event pairs, 2139 based on Foata normal form. 8/9775 useless extension candidates. Maximal degree in co-relation 91798. Up to 8977 conditions per place. [2024-06-21 21:01:39,303 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 650 selfloop transitions, 33 changer transitions 0/808 dead transitions. [2024-06-21 21:01:39,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 808 transitions, 15044 flow [2024-06-21 21:01:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:01:39,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-21 21:01:39,304 INFO L175 Difference]: Start difference. First operand has 328 places, 790 transitions, 13425 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:01:39,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 808 transitions, 15044 flow [2024-06-21 21:01:42,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 808 transitions, 14917 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:42,397 INFO L231 Difference]: Finished difference. Result has 331 places, 793 transitions, 13433 flow [2024-06-21 21:01:42,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13300, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13433, PETRI_PLACES=331, PETRI_TRANSITIONS=793} [2024-06-21 21:01:42,397 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-21 21:01:42,397 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 793 transitions, 13433 flow [2024-06-21 21:01:42,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:42,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:42,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:42,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:01:42,398 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:42,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1377524535, now seen corresponding path program 11 times [2024-06-21 21:01:42,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:42,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513940868] [2024-06-21 21:01:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:43,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513940868] [2024-06-21 21:01:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513940868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:43,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:43,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465422392] [2024-06-21 21:01:43,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:43,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:43,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 793 transitions, 13433 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:43,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:43,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:43,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:45,648 INFO L124 PetriNetUnfolderBase]: 6050/9338 cut-off events. [2024-06-21 21:01:45,648 INFO L125 PetriNetUnfolderBase]: For 1026768/1026770 co-relation queries the response was YES. [2024-06-21 21:01:45,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89582 conditions, 9338 events. 6050/9338 cut-off events. For 1026768/1026770 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 56644 event pairs, 2028 based on Foata normal form. 15/9350 useless extension candidates. Maximal degree in co-relation 89432. Up to 8666 conditions per place. [2024-06-21 21:01:45,781 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 769 selfloop transitions, 68 changer transitions 0/847 dead transitions. [2024-06-21 21:01:45,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 847 transitions, 16229 flow [2024-06-21 21:01:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 21:01:45,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-21 21:01:45,782 INFO L175 Difference]: Start difference. First operand has 331 places, 793 transitions, 13433 flow. Second operand 9 states and 175 transitions. [2024-06-21 21:01:45,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 847 transitions, 16229 flow [2024-06-21 21:01:48,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 847 transitions, 16134 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:48,672 INFO L231 Difference]: Finished difference. Result has 336 places, 810 transitions, 13967 flow [2024-06-21 21:01:48,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13342, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=729, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13967, PETRI_PLACES=336, PETRI_TRANSITIONS=810} [2024-06-21 21:01:48,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-21 21:01:48,674 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 810 transitions, 13967 flow [2024-06-21 21:01:48,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:48,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:48,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:48,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:01:48,675 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:48,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1736386407, now seen corresponding path program 1 times [2024-06-21 21:01:48,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:48,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180851591] [2024-06-21 21:01:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:49,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:49,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180851591] [2024-06-21 21:01:49,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180851591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:49,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:49,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:01:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385631107] [2024-06-21 21:01:49,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:49,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:01:49,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:49,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:01:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:01:49,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:01:49,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 810 transitions, 13967 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:49,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:49,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:01:49,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:52,390 INFO L124 PetriNetUnfolderBase]: 6722/10171 cut-off events. [2024-06-21 21:01:52,390 INFO L125 PetriNetUnfolderBase]: For 1032432/1032432 co-relation queries the response was YES. [2024-06-21 21:01:52,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96363 conditions, 10171 events. 6722/10171 cut-off events. For 1032432/1032432 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 59528 event pairs, 2358 based on Foata normal form. 3/10173 useless extension candidates. Maximal degree in co-relation 96212. Up to 9779 conditions per place. [2024-06-21 21:01:52,542 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 806 selfloop transitions, 34 changer transitions 0/848 dead transitions. [2024-06-21 21:01:52,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 848 transitions, 15948 flow [2024-06-21 21:01:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:01:52,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-21 21:01:52,544 INFO L175 Difference]: Start difference. First operand has 336 places, 810 transitions, 13967 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:01:52,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 848 transitions, 15948 flow [2024-06-21 21:01:55,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 848 transitions, 15379 flow, removed 188 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:55,992 INFO L231 Difference]: Finished difference. Result has 339 places, 819 transitions, 13652 flow [2024-06-21 21:01:55,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13412, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13652, PETRI_PLACES=339, PETRI_TRANSITIONS=819} [2024-06-21 21:01:55,993 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-21 21:01:55,993 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 819 transitions, 13652 flow [2024-06-21 21:01:55,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:55,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:55,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:55,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:01:55,994 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:55,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1120822215, now seen corresponding path program 12 times [2024-06-21 21:01:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636928759] [2024-06-21 21:01:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:55,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:57,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:57,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636928759] [2024-06-21 21:01:57,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636928759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:57,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:57,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:57,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637924711] [2024-06-21 21:01:57,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:57,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:57,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:57,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:57,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:57,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:01:57,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 819 transitions, 13652 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:57,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:57,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:01:57,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:59,412 INFO L124 PetriNetUnfolderBase]: 6194/9567 cut-off events. [2024-06-21 21:01:59,412 INFO L125 PetriNetUnfolderBase]: For 1048115/1048117 co-relation queries the response was YES. [2024-06-21 21:01:59,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91315 conditions, 9567 events. 6194/9567 cut-off events. For 1048115/1048117 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 58413 event pairs, 1950 based on Foata normal form. 12/9574 useless extension candidates. Maximal degree in co-relation 91163. Up to 8691 conditions per place. [2024-06-21 21:01:59,559 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 743 selfloop transitions, 118 changer transitions 0/871 dead transitions. [2024-06-21 21:01:59,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 871 transitions, 16219 flow [2024-06-21 21:01:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 21:01:59,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 21:01:59,560 INFO L175 Difference]: Start difference. First operand has 339 places, 819 transitions, 13652 flow. Second operand 9 states and 177 transitions. [2024-06-21 21:01:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 871 transitions, 16219 flow [2024-06-21 21:02:02,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 871 transitions, 16141 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:02,679 INFO L231 Difference]: Finished difference. Result has 340 places, 831 transitions, 14167 flow [2024-06-21 21:02:02,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13574, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14167, PETRI_PLACES=340, PETRI_TRANSITIONS=831} [2024-06-21 21:02:02,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-21 21:02:02,680 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 831 transitions, 14167 flow [2024-06-21 21:02:02,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:02,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:02,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:02,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:02:02,680 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:02,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2002625598, now seen corresponding path program 21 times [2024-06-21 21:02:02,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:02,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429605683] [2024-06-21 21:02:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:03,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:03,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429605683] [2024-06-21 21:02:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429605683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:03,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:03,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:03,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211661766] [2024-06-21 21:02:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:03,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:03,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:02:03,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 831 transitions, 14167 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:03,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:03,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:02:03,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:06,090 INFO L124 PetriNetUnfolderBase]: 6166/9513 cut-off events. [2024-06-21 21:02:06,090 INFO L125 PetriNetUnfolderBase]: For 1050875/1050877 co-relation queries the response was YES. [2024-06-21 21:02:06,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90927 conditions, 9513 events. 6166/9513 cut-off events. For 1050875/1050877 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 57988 event pairs, 2007 based on Foata normal form. 14/9521 useless extension candidates. Maximal degree in co-relation 90774. Up to 8938 conditions per place. [2024-06-21 21:02:06,244 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 800 selfloop transitions, 48 changer transitions 0/858 dead transitions. [2024-06-21 21:02:06,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 858 transitions, 16018 flow [2024-06-21 21:02:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:02:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:02:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:02:06,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-21 21:02:06,245 INFO L175 Difference]: Start difference. First operand has 340 places, 831 transitions, 14167 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:02:06,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 858 transitions, 16018 flow [2024-06-21 21:02:09,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 858 transitions, 15468 flow, removed 165 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:09,879 INFO L231 Difference]: Finished difference. Result has 342 places, 831 transitions, 13731 flow [2024-06-21 21:02:09,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13617, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13731, PETRI_PLACES=342, PETRI_TRANSITIONS=831} [2024-06-21 21:02:09,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-21 21:02:09,880 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 831 transitions, 13731 flow [2024-06-21 21:02:09,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:09,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:09,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:09,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:02:09,881 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:09,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2002418053, now seen corresponding path program 13 times [2024-06-21 21:02:09,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:09,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458051975] [2024-06-21 21:02:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:10,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:10,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458051975] [2024-06-21 21:02:10,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458051975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:10,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:10,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:10,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915794723] [2024-06-21 21:02:10,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:10,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:10,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:10,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:11,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:02:11,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 831 transitions, 13731 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:11,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:11,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:02:11,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:13,324 INFO L124 PetriNetUnfolderBase]: 6230/9628 cut-off events. [2024-06-21 21:02:13,324 INFO L125 PetriNetUnfolderBase]: For 1071686/1071688 co-relation queries the response was YES. [2024-06-21 21:02:13,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91310 conditions, 9628 events. 6230/9628 cut-off events. For 1071686/1071688 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 58926 event pairs, 1970 based on Foata normal form. 12/9635 useless extension candidates. Maximal degree in co-relation 91156. Up to 8743 conditions per place. [2024-06-21 21:02:13,472 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 759 selfloop transitions, 113 changer transitions 0/882 dead transitions. [2024-06-21 21:02:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 882 transitions, 16325 flow [2024-06-21 21:02:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:02:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:02:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 21:02:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 21:02:13,473 INFO L175 Difference]: Start difference. First operand has 342 places, 831 transitions, 13731 flow. Second operand 9 states and 178 transitions. [2024-06-21 21:02:13,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 882 transitions, 16325 flow [2024-06-21 21:02:16,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 882 transitions, 16080 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:16,746 INFO L231 Difference]: Finished difference. Result has 343 places, 843 transitions, 14093 flow [2024-06-21 21:02:16,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13486, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14093, PETRI_PLACES=343, PETRI_TRANSITIONS=843} [2024-06-21 21:02:16,746 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-21 21:02:16,747 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 843 transitions, 14093 flow [2024-06-21 21:02:16,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:16,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:16,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:16,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:02:16,747 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:16,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2002625443, now seen corresponding path program 14 times [2024-06-21 21:02:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:16,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291779705] [2024-06-21 21:02:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:16,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:17,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291779705] [2024-06-21 21:02:17,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291779705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:17,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:17,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:17,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272217908] [2024-06-21 21:02:17,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:17,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:17,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:18,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:02:18,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 843 transitions, 14093 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:18,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:18,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:02:18,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:20,483 INFO L124 PetriNetUnfolderBase]: 6202/9582 cut-off events. [2024-06-21 21:02:20,483 INFO L125 PetriNetUnfolderBase]: For 1071733/1071735 co-relation queries the response was YES. [2024-06-21 21:02:20,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90675 conditions, 9582 events. 6202/9582 cut-off events. For 1071733/1071735 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 58596 event pairs, 1925 based on Foata normal form. 12/9589 useless extension candidates. Maximal degree in co-relation 90520. Up to 8520 conditions per place. [2024-06-21 21:02:20,621 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 723 selfloop transitions, 154 changer transitions 0/887 dead transitions. [2024-06-21 21:02:20,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 887 transitions, 16157 flow [2024-06-21 21:02:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:02:20,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-21 21:02:20,623 INFO L175 Difference]: Start difference. First operand has 343 places, 843 transitions, 14093 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:02:20,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 887 transitions, 16157 flow [2024-06-21 21:02:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 887 transitions, 15649 flow, removed 149 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:24,173 INFO L231 Difference]: Finished difference. Result has 346 places, 843 transitions, 13929 flow [2024-06-21 21:02:24,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13585, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13929, PETRI_PLACES=346, PETRI_TRANSITIONS=843} [2024-06-21 21:02:24,174 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-21 21:02:24,174 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 843 transitions, 13929 flow [2024-06-21 21:02:24,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:24,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:24,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:24,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:02:24,174 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:24,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash -318285731, now seen corresponding path program 3 times [2024-06-21 21:02:24,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:24,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138405627] [2024-06-21 21:02:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:24,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:24,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138405627] [2024-06-21 21:02:24,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138405627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:24,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:02:24,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224371510] [2024-06-21 21:02:24,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:02:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:02:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:02:25,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:25,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 843 transitions, 13929 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:25,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:25,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:25,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:27,319 INFO L124 PetriNetUnfolderBase]: 6650/10158 cut-off events. [2024-06-21 21:02:27,320 INFO L125 PetriNetUnfolderBase]: For 1093338/1093356 co-relation queries the response was YES. [2024-06-21 21:02:27,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93580 conditions, 10158 events. 6650/10158 cut-off events. For 1093338/1093356 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 60772 event pairs, 2400 based on Foata normal form. 13/10150 useless extension candidates. Maximal degree in co-relation 93424. Up to 9390 conditions per place. [2024-06-21 21:02:27,475 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 715 selfloop transitions, 15 changer transitions 0/855 dead transitions. [2024-06-21 21:02:27,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 855 transitions, 15481 flow [2024-06-21 21:02:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 21:02:27,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-21 21:02:27,476 INFO L175 Difference]: Start difference. First operand has 346 places, 843 transitions, 13929 flow. Second operand 7 states and 116 transitions. [2024-06-21 21:02:27,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 855 transitions, 15481 flow [2024-06-21 21:02:31,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 855 transitions, 14692 flow, removed 79 selfloop flow, removed 9 redundant places. [2024-06-21 21:02:31,427 INFO L231 Difference]: Finished difference. Result has 344 places, 846 transitions, 13242 flow [2024-06-21 21:02:31,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13140, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13242, PETRI_PLACES=344, PETRI_TRANSITIONS=846} [2024-06-21 21:02:31,428 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-21 21:02:31,428 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 846 transitions, 13242 flow [2024-06-21 21:02:31,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:31,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:31,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:31,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:02:31,429 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:31,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:31,429 INFO L85 PathProgramCache]: Analyzing trace with hash -318761395, now seen corresponding path program 6 times [2024-06-21 21:02:31,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:31,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788014428] [2024-06-21 21:02:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:31,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:32,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788014428] [2024-06-21 21:02:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788014428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:32,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:32,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:02:32,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276224895] [2024-06-21 21:02:32,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:32,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:02:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:02:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:02:32,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:02:32,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 846 transitions, 13242 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:32,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:32,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:02:32,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:34,627 INFO L124 PetriNetUnfolderBase]: 6470/9978 cut-off events. [2024-06-21 21:02:34,627 INFO L125 PetriNetUnfolderBase]: For 1084342/1084362 co-relation queries the response was YES. [2024-06-21 21:02:34,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89907 conditions, 9978 events. 6470/9978 cut-off events. For 1084342/1084362 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 60578 event pairs, 2319 based on Foata normal form. 16/9973 useless extension candidates. Maximal degree in co-relation 89751. Up to 9029 conditions per place. [2024-06-21 21:02:34,787 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 699 selfloop transitions, 26 changer transitions 0/856 dead transitions. [2024-06-21 21:02:34,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 856 transitions, 14874 flow [2024-06-21 21:02:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:02:34,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 21:02:34,788 INFO L175 Difference]: Start difference. First operand has 344 places, 846 transitions, 13242 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:02:34,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 856 transitions, 14874 flow [2024-06-21 21:02:38,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 856 transitions, 14780 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:02:38,519 INFO L231 Difference]: Finished difference. Result has 346 places, 846 transitions, 13208 flow [2024-06-21 21:02:38,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13148, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13208, PETRI_PLACES=346, PETRI_TRANSITIONS=846} [2024-06-21 21:02:38,520 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-21 21:02:38,520 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 846 transitions, 13208 flow [2024-06-21 21:02:38,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:38,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:38,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:02:38,520 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:38,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1183581951, now seen corresponding path program 4 times [2024-06-21 21:02:38,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:38,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947726273] [2024-06-21 21:02:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:39,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:39,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947726273] [2024-06-21 21:02:39,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947726273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:39,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:39,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:02:39,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773811836] [2024-06-21 21:02:39,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:39,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:02:39,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:02:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:02:39,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:39,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 846 transitions, 13208 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:39,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:39,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:39,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:41,557 INFO L124 PetriNetUnfolderBase]: 6643/10149 cut-off events. [2024-06-21 21:02:41,557 INFO L125 PetriNetUnfolderBase]: For 1102179/1102197 co-relation queries the response was YES. [2024-06-21 21:02:41,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90876 conditions, 10149 events. 6643/10149 cut-off events. For 1102179/1102197 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 60717 event pairs, 2423 based on Foata normal form. 13/10141 useless extension candidates. Maximal degree in co-relation 90719. Up to 9375 conditions per place. [2024-06-21 21:02:41,710 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 710 selfloop transitions, 20 changer transitions 0/855 dead transitions. [2024-06-21 21:02:41,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 855 transitions, 14700 flow [2024-06-21 21:02:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:02:41,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-21 21:02:41,711 INFO L175 Difference]: Start difference. First operand has 346 places, 846 transitions, 13208 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:02:41,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 855 transitions, 14700 flow [2024-06-21 21:02:45,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 855 transitions, 14455 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:45,096 INFO L231 Difference]: Finished difference. Result has 345 places, 846 transitions, 13009 flow [2024-06-21 21:02:45,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12963, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13009, PETRI_PLACES=345, PETRI_TRANSITIONS=846} [2024-06-21 21:02:45,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-21 21:02:45,097 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 846 transitions, 13009 flow [2024-06-21 21:02:45,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:45,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:45,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:45,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:02:45,098 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:45,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash -554931547, now seen corresponding path program 1 times [2024-06-21 21:02:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:45,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159288453] [2024-06-21 21:02:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:45,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:45,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159288453] [2024-06-21 21:02:45,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159288453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:45,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:45,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:02:45,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610772624] [2024-06-21 21:02:45,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:45,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:02:45,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:45,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:02:45,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:02:45,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:45,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 846 transitions, 13009 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:45,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:45,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:45,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:48,346 INFO L124 PetriNetUnfolderBase]: 6847/10361 cut-off events. [2024-06-21 21:02:48,346 INFO L125 PetriNetUnfolderBase]: For 1119217/1119217 co-relation queries the response was YES. [2024-06-21 21:02:48,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93529 conditions, 10361 events. 6847/10361 cut-off events. For 1119217/1119217 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 60982 event pairs, 2396 based on Foata normal form. 1/10361 useless extension candidates. Maximal degree in co-relation 93373. Up to 10009 conditions per place. [2024-06-21 21:02:48,503 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 834 selfloop transitions, 25 changer transitions 0/868 dead transitions. [2024-06-21 21:02:48,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 868 transitions, 15025 flow [2024-06-21 21:02:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:02:48,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-21 21:02:48,504 INFO L175 Difference]: Start difference. First operand has 345 places, 846 transitions, 13009 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:02:48,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 868 transitions, 15025 flow [2024-06-21 21:02:52,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 868 transitions, 14953 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:02:52,169 INFO L231 Difference]: Finished difference. Result has 346 places, 852 transitions, 13075 flow [2024-06-21 21:02:52,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12937, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13075, PETRI_PLACES=346, PETRI_TRANSITIONS=852} [2024-06-21 21:02:52,170 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-21 21:02:52,170 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 852 transitions, 13075 flow [2024-06-21 21:02:52,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:52,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:52,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:02:52,171 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:52,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -55740819, now seen corresponding path program 1 times [2024-06-21 21:02:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338472584] [2024-06-21 21:02:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:52,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338472584] [2024-06-21 21:02:52,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338472584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:52,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:02:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842216321] [2024-06-21 21:02:52,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:52,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:02:52,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:52,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:02:52,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:02:53,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:02:53,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 852 transitions, 13075 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:53,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:53,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:02:53,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:55,470 INFO L124 PetriNetUnfolderBase]: 6665/10175 cut-off events. [2024-06-21 21:02:55,470 INFO L125 PetriNetUnfolderBase]: For 1154460/1154478 co-relation queries the response was YES. [2024-06-21 21:02:55,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91695 conditions, 10175 events. 6665/10175 cut-off events. For 1154460/1154478 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 60802 event pairs, 2423 based on Foata normal form. 13/10167 useless extension candidates. Maximal degree in co-relation 91538. Up to 9372 conditions per place. [2024-06-21 21:02:55,642 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 720 selfloop transitions, 24 changer transitions 0/871 dead transitions. [2024-06-21 21:02:55,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 871 transitions, 14853 flow [2024-06-21 21:02:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:02:55,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 21:02:55,643 INFO L175 Difference]: Start difference. First operand has 346 places, 852 transitions, 13075 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:02:55,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 871 transitions, 14853 flow [2024-06-21 21:02:59,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 871 transitions, 14794 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:02:59,795 INFO L231 Difference]: Finished difference. Result has 350 places, 858 transitions, 13160 flow [2024-06-21 21:02:59,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13016, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13160, PETRI_PLACES=350, PETRI_TRANSITIONS=858} [2024-06-21 21:02:59,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-21 21:02:59,796 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 858 transitions, 13160 flow [2024-06-21 21:02:59,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:59,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:59,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:59,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:02:59,796 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:59,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash -554752057, now seen corresponding path program 2 times [2024-06-21 21:02:59,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:59,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645470644] [2024-06-21 21:02:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:59,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:00,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:00,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645470644] [2024-06-21 21:03:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645470644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:00,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627797585] [2024-06-21 21:03:00,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:00,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:00,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:00,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 858 transitions, 13160 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:00,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:00,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:00,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:03,066 INFO L124 PetriNetUnfolderBase]: 6869/10387 cut-off events. [2024-06-21 21:03:03,066 INFO L125 PetriNetUnfolderBase]: For 1177119/1177119 co-relation queries the response was YES. [2024-06-21 21:03:03,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95222 conditions, 10387 events. 6869/10387 cut-off events. For 1177119/1177119 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 60998 event pairs, 2395 based on Foata normal form. 1/10387 useless extension candidates. Maximal degree in co-relation 95063. Up to 10032 conditions per place. [2024-06-21 21:03:03,224 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 836 selfloop transitions, 27 changer transitions 0/874 dead transitions. [2024-06-21 21:03:03,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 874 transitions, 15130 flow [2024-06-21 21:03:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:03:03,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 21:03:03,225 INFO L175 Difference]: Start difference. First operand has 350 places, 858 transitions, 13160 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:03:03,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 874 transitions, 15130 flow [2024-06-21 21:03:07,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 874 transitions, 15077 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:07,274 INFO L231 Difference]: Finished difference. Result has 354 places, 861 transitions, 13203 flow [2024-06-21 21:03:07,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13107, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13203, PETRI_PLACES=354, PETRI_TRANSITIONS=861} [2024-06-21 21:03:07,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-21 21:03:07,274 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 861 transitions, 13203 flow [2024-06-21 21:03:07,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:07,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:07,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:07,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:03:07,275 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:07,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash 201883813, now seen corresponding path program 3 times [2024-06-21 21:03:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216449663] [2024-06-21 21:03:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:08,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:08,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216449663] [2024-06-21 21:03:08,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216449663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:08,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:08,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:08,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517229314] [2024-06-21 21:03:08,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:08,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:08,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:08,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:08,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 861 transitions, 13203 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:08,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:08,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:08,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:10,542 INFO L124 PetriNetUnfolderBase]: 6866/10384 cut-off events. [2024-06-21 21:03:10,543 INFO L125 PetriNetUnfolderBase]: For 1201630/1201632 co-relation queries the response was YES. [2024-06-21 21:03:10,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95503 conditions, 10384 events. 6866/10384 cut-off events. For 1201630/1201632 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 60943 event pairs, 2402 based on Foata normal form. 1/10384 useless extension candidates. Maximal degree in co-relation 95342. Up to 10029 conditions per place. [2024-06-21 21:03:10,706 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 832 selfloop transitions, 27 changer transitions 0/870 dead transitions. [2024-06-21 21:03:10,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 870 transitions, 14953 flow [2024-06-21 21:03:10,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:03:10,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 21:03:10,707 INFO L175 Difference]: Start difference. First operand has 354 places, 861 transitions, 13203 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:03:10,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 870 transitions, 14953 flow [2024-06-21 21:03:15,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 870 transitions, 14877 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 21:03:15,028 INFO L231 Difference]: Finished difference. Result has 357 places, 861 transitions, 13187 flow [2024-06-21 21:03:15,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13127, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13187, PETRI_PLACES=357, PETRI_TRANSITIONS=861} [2024-06-21 21:03:15,029 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-21 21:03:15,029 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 861 transitions, 13187 flow [2024-06-21 21:03:15,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:15,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:15,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:03:15,030 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:15,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:15,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1183100769, now seen corresponding path program 2 times [2024-06-21 21:03:15,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:15,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996525678] [2024-06-21 21:03:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:15,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:15,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996525678] [2024-06-21 21:03:15,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996525678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:15,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:15,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:15,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877851276] [2024-06-21 21:03:15,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:15,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:15,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:15,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:15,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:15,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:15,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 861 transitions, 13187 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:15,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:15,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:15,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:18,313 INFO L124 PetriNetUnfolderBase]: 6672/10186 cut-off events. [2024-06-21 21:03:18,313 INFO L125 PetriNetUnfolderBase]: For 1236601/1236621 co-relation queries the response was YES. [2024-06-21 21:03:18,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93155 conditions, 10186 events. 6672/10186 cut-off events. For 1236601/1236621 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 60903 event pairs, 2425 based on Foata normal form. 15/10180 useless extension candidates. Maximal degree in co-relation 92993. Up to 9380 conditions per place. [2024-06-21 21:03:18,498 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 718 selfloop transitions, 28 changer transitions 0/874 dead transitions. [2024-06-21 21:03:18,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 874 transitions, 14919 flow [2024-06-21 21:03:18,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:18,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:03:18,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 21:03:18,499 INFO L175 Difference]: Start difference. First operand has 357 places, 861 transitions, 13187 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:03:18,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 874 transitions, 14919 flow [2024-06-21 21:03:22,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 874 transitions, 14835 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:22,809 INFO L231 Difference]: Finished difference. Result has 357 places, 864 transitions, 13211 flow [2024-06-21 21:03:22,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13103, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13211, PETRI_PLACES=357, PETRI_TRANSITIONS=864} [2024-06-21 21:03:22,810 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-21 21:03:22,810 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 864 transitions, 13211 flow [2024-06-21 21:03:22,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:22,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:22,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:22,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:03:22,810 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:22,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash -318576449, now seen corresponding path program 3 times [2024-06-21 21:03:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:22,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361052518] [2024-06-21 21:03:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:22,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:23,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361052518] [2024-06-21 21:03:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361052518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:23,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:23,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531725443] [2024-06-21 21:03:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:23,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:23,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:23,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:03:23,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 864 transitions, 13211 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:23,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:23,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:03:23,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:26,155 INFO L124 PetriNetUnfolderBase]: 6669/10182 cut-off events. [2024-06-21 21:03:26,155 INFO L125 PetriNetUnfolderBase]: For 1261333/1261353 co-relation queries the response was YES. [2024-06-21 21:03:26,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93376 conditions, 10182 events. 6669/10182 cut-off events. For 1261333/1261353 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 60853 event pairs, 2425 based on Foata normal form. 15/10176 useless extension candidates. Maximal degree in co-relation 93213. Up to 9377 conditions per place. [2024-06-21 21:03:26,334 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 718 selfloop transitions, 27 changer transitions 0/873 dead transitions. [2024-06-21 21:03:26,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 873 transitions, 14733 flow [2024-06-21 21:03:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:03:26,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 21:03:26,335 INFO L175 Difference]: Start difference. First operand has 357 places, 864 transitions, 13211 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:03:26,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 873 transitions, 14733 flow [2024-06-21 21:03:31,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 873 transitions, 14625 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:03:31,358 INFO L231 Difference]: Finished difference. Result has 360 places, 864 transitions, 13163 flow [2024-06-21 21:03:31,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13103, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13163, PETRI_PLACES=360, PETRI_TRANSITIONS=864} [2024-06-21 21:03:31,359 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-21 21:03:31,359 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 864 transitions, 13163 flow [2024-06-21 21:03:31,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:31,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:31,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:31,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:03:31,359 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:31,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 724536075, now seen corresponding path program 1 times [2024-06-21 21:03:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:31,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344175743] [2024-06-21 21:03:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:32,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:32,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344175743] [2024-06-21 21:03:32,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344175743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:32,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:32,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626688259] [2024-06-21 21:03:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:32,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:32,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:03:32,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 864 transitions, 13163 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:32,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:32,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:03:32,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:34,974 INFO L124 PetriNetUnfolderBase]: 6516/10099 cut-off events. [2024-06-21 21:03:34,974 INFO L125 PetriNetUnfolderBase]: For 1416489/1416543 co-relation queries the response was YES. [2024-06-21 21:03:35,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97043 conditions, 10099 events. 6516/10099 cut-off events. For 1416489/1416543 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62498 event pairs, 1098 based on Foata normal form. 64/10159 useless extension candidates. Maximal degree in co-relation 96879. Up to 4396 conditions per place. [2024-06-21 21:03:35,142 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 441 selfloop transitions, 481 changer transitions 0/936 dead transitions. [2024-06-21 21:03:35,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 936 transitions, 16295 flow [2024-06-21 21:03:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-21 21:03:35,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:03:35,143 INFO L175 Difference]: Start difference. First operand has 360 places, 864 transitions, 13163 flow. Second operand 10 states and 220 transitions. [2024-06-21 21:03:35,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 936 transitions, 16295 flow [2024-06-21 21:03:38,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 936 transitions, 16219 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:38,699 INFO L231 Difference]: Finished difference. Result has 364 places, 868 transitions, 14406 flow [2024-06-21 21:03:38,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13087, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14406, PETRI_PLACES=364, PETRI_TRANSITIONS=868} [2024-06-21 21:03:38,699 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-21 21:03:38,700 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 868 transitions, 14406 flow [2024-06-21 21:03:38,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:38,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:38,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:38,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:03:38,700 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:38,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -245912019, now seen corresponding path program 2 times [2024-06-21 21:03:38,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:38,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661205221] [2024-06-21 21:03:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:38,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:39,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661205221] [2024-06-21 21:03:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661205221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:39,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:39,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249892883] [2024-06-21 21:03:39,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:39,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:39,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:39,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:03:39,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 868 transitions, 14406 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:39,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:39,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:03:39,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:42,522 INFO L124 PetriNetUnfolderBase]: 6915/10771 cut-off events. [2024-06-21 21:03:42,522 INFO L125 PetriNetUnfolderBase]: For 1634961/1635015 co-relation queries the response was YES. [2024-06-21 21:03:42,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107738 conditions, 10771 events. 6915/10771 cut-off events. For 1634961/1635015 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 67889 event pairs, 1525 based on Foata normal form. 72/10840 useless extension candidates. Maximal degree in co-relation 107572. Up to 5873 conditions per place. [2024-06-21 21:03:42,708 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 469 selfloop transitions, 464 changer transitions 0/947 dead transitions. [2024-06-21 21:03:42,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 947 transitions, 17663 flow [2024-06-21 21:03:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 21:03:42,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-06-21 21:03:42,709 INFO L175 Difference]: Start difference. First operand has 364 places, 868 transitions, 14406 flow. Second operand 10 states and 219 transitions. [2024-06-21 21:03:42,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 947 transitions, 17663 flow [2024-06-21 21:03:47,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 947 transitions, 17200 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 21:03:47,453 INFO L231 Difference]: Finished difference. Result has 369 places, 873 transitions, 15079 flow [2024-06-21 21:03:47,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13983, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15079, PETRI_PLACES=369, PETRI_TRANSITIONS=873} [2024-06-21 21:03:47,454 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-21 21:03:47,454 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 873 transitions, 15079 flow [2024-06-21 21:03:47,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:47,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:47,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:47,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:03:47,455 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:47,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:47,455 INFO L85 PathProgramCache]: Analyzing trace with hash -967739731, now seen corresponding path program 3 times [2024-06-21 21:03:47,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:47,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090290947] [2024-06-21 21:03:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:48,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:48,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:48,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090290947] [2024-06-21 21:03:48,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090290947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:48,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:48,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:48,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951679828] [2024-06-21 21:03:48,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:48,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:48,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:48,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:03:48,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 873 transitions, 15079 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:48,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:48,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:03:48,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:51,641 INFO L124 PetriNetUnfolderBase]: 7251/11347 cut-off events. [2024-06-21 21:03:51,641 INFO L125 PetriNetUnfolderBase]: For 1798742/1798796 co-relation queries the response was YES. [2024-06-21 21:03:51,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116468 conditions, 11347 events. 7251/11347 cut-off events. For 1798742/1798796 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 72633 event pairs, 1728 based on Foata normal form. 72/11418 useless extension candidates. Maximal degree in co-relation 116300. Up to 7820 conditions per place. [2024-06-21 21:03:51,836 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 515 selfloop transitions, 418 changer transitions 0/947 dead transitions. [2024-06-21 21:03:51,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 947 transitions, 18277 flow [2024-06-21 21:03:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:51,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 21:03:51,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-21 21:03:51,838 INFO L175 Difference]: Start difference. First operand has 369 places, 873 transitions, 15079 flow. Second operand 10 states and 222 transitions. [2024-06-21 21:03:51,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 947 transitions, 18277 flow [2024-06-21 21:03:57,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 947 transitions, 17805 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 21:03:57,327 INFO L231 Difference]: Finished difference. Result has 374 places, 878 transitions, 15665 flow [2024-06-21 21:03:57,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14607, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15665, PETRI_PLACES=374, PETRI_TRANSITIONS=878} [2024-06-21 21:03:57,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-21 21:03:57,328 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 878 transitions, 15665 flow [2024-06-21 21:03:57,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:57,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:57,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:57,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:03:57,328 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:57,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash -187704249, now seen corresponding path program 4 times [2024-06-21 21:03:57,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:57,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571335379] [2024-06-21 21:03:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:57,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:58,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:58,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571335379] [2024-06-21 21:03:58,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571335379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:58,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:58,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:03:58,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086444838] [2024-06-21 21:03:58,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:58,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:03:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:03:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:03:58,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:03:58,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 878 transitions, 15665 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:58,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:58,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:03:58,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:02,344 INFO L124 PetriNetUnfolderBase]: 7347/11510 cut-off events. [2024-06-21 21:04:02,344 INFO L125 PetriNetUnfolderBase]: For 1852230/1852284 co-relation queries the response was YES. [2024-06-21 21:04:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119881 conditions, 11510 events. 7347/11510 cut-off events. For 1852230/1852284 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 73980 event pairs, 1821 based on Foata normal form. 72/11581 useless extension candidates. Maximal degree in co-relation 119710. Up to 8211 conditions per place. [2024-06-21 21:04:02,513 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 525 selfloop transitions, 409 changer transitions 0/948 dead transitions. [2024-06-21 21:04:02,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 948 transitions, 18783 flow [2024-06-21 21:04:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-21 21:04:02,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-21 21:04:02,514 INFO L175 Difference]: Start difference. First operand has 374 places, 878 transitions, 15665 flow. Second operand 10 states and 222 transitions. [2024-06-21 21:04:02,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 948 transitions, 18783 flow [2024-06-21 21:04:07,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 948 transitions, 18300 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:07,588 INFO L231 Difference]: Finished difference. Result has 378 places, 880 transitions, 16093 flow [2024-06-21 21:04:07,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15182, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16093, PETRI_PLACES=378, PETRI_TRANSITIONS=880} [2024-06-21 21:04:07,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-21 21:04:07,589 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 880 transitions, 16093 flow [2024-06-21 21:04:07,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:07,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:07,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:07,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:04:07,590 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:07,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -187699599, now seen corresponding path program 5 times [2024-06-21 21:04:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:07,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51879788] [2024-06-21 21:04:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:08,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:08,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51879788] [2024-06-21 21:04:08,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51879788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:08,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:08,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:08,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349393817] [2024-06-21 21:04:08,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:08,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:08,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:08,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:08,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:04:08,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 880 transitions, 16093 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:08,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:08,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:04:08,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:12,722 INFO L124 PetriNetUnfolderBase]: 7262/11386 cut-off events. [2024-06-21 21:04:12,722 INFO L125 PetriNetUnfolderBase]: For 1811943/1811997 co-relation queries the response was YES. [2024-06-21 21:04:12,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117250 conditions, 11386 events. 7262/11386 cut-off events. For 1811943/1811997 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 73166 event pairs, 1813 based on Foata normal form. 90/11475 useless extension candidates. Maximal degree in co-relation 117077. Up to 8469 conditions per place. [2024-06-21 21:04:13,042 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 531 selfloop transitions, 396 changer transitions 0/941 dead transitions. [2024-06-21 21:04:13,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 941 transitions, 18794 flow [2024-06-21 21:04:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:04:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:04:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 21:04:13,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-21 21:04:13,045 INFO L175 Difference]: Start difference. First operand has 378 places, 880 transitions, 16093 flow. Second operand 10 states and 218 transitions. [2024-06-21 21:04:13,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 941 transitions, 18794 flow [2024-06-21 21:04:17,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 941 transitions, 17892 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:17,172 INFO L231 Difference]: Finished difference. Result has 380 places, 880 transitions, 15995 flow [2024-06-21 21:04:17,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15191, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15995, PETRI_PLACES=380, PETRI_TRANSITIONS=880} [2024-06-21 21:04:17,172 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-21 21:04:17,173 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 880 transitions, 15995 flow [2024-06-21 21:04:17,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:17,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:17,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:17,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:04:17,173 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:17,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:17,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1203001512, now seen corresponding path program 1 times [2024-06-21 21:04:17,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:17,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126737913] [2024-06-21 21:04:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:17,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126737913] [2024-06-21 21:04:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126737913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:17,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:17,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:17,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918796389] [2024-06-21 21:04:17,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:17,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:17,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:17,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:18,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:04:18,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 880 transitions, 15995 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:18,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:18,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:04:18,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:21,817 INFO L124 PetriNetUnfolderBase]: 7686/11966 cut-off events. [2024-06-21 21:04:21,817 INFO L125 PetriNetUnfolderBase]: For 1768088/1768133 co-relation queries the response was YES. [2024-06-21 21:04:21,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121926 conditions, 11966 events. 7686/11966 cut-off events. For 1768088/1768133 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 75970 event pairs, 2182 based on Foata normal form. 39/11988 useless extension candidates. Maximal degree in co-relation 121752. Up to 10526 conditions per place. [2024-06-21 21:04:22,024 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 668 selfloop transitions, 119 changer transitions 0/924 dead transitions. [2024-06-21 21:04:22,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 924 transitions, 18342 flow [2024-06-21 21:04:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 21:04:22,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 21:04:22,025 INFO L175 Difference]: Start difference. First operand has 380 places, 880 transitions, 15995 flow. Second operand 8 states and 167 transitions. [2024-06-21 21:04:22,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 924 transitions, 18342 flow [2024-06-21 21:04:28,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 924 transitions, 17768 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:28,022 INFO L231 Difference]: Finished difference. Result has 382 places, 898 transitions, 16074 flow [2024-06-21 21:04:28,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15426, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16074, PETRI_PLACES=382, PETRI_TRANSITIONS=898} [2024-06-21 21:04:28,023 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-21 21:04:28,023 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 898 transitions, 16074 flow [2024-06-21 21:04:28,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:28,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:28,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:04:28,023 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:28,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash -744463537, now seen corresponding path program 1 times [2024-06-21 21:04:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845760338] [2024-06-21 21:04:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:28,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:28,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:28,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845760338] [2024-06-21 21:04:28,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845760338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:28,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:28,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:28,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172231461] [2024-06-21 21:04:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:28,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:28,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:28,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:28,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:29,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-21 21:04:29,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 898 transitions, 16074 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:29,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:29,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-21 21:04:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:32,967 INFO L124 PetriNetUnfolderBase]: 7846/12128 cut-off events. [2024-06-21 21:04:32,968 INFO L125 PetriNetUnfolderBase]: For 1814111/1814148 co-relation queries the response was YES. [2024-06-21 21:04:33,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122568 conditions, 12128 events. 7846/12128 cut-off events. For 1814111/1814148 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 76251 event pairs, 2502 based on Foata normal form. 26/12128 useless extension candidates. Maximal degree in co-relation 122391. Up to 10957 conditions per place. [2024-06-21 21:04:33,168 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 699 selfloop transitions, 109 changer transitions 0/936 dead transitions. [2024-06-21 21:04:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 936 transitions, 18346 flow [2024-06-21 21:04:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:04:33,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-21 21:04:33,169 INFO L175 Difference]: Start difference. First operand has 382 places, 898 transitions, 16074 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:04:33,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 936 transitions, 18346 flow [2024-06-21 21:04:38,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 936 transitions, 18257 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 21:04:38,827 INFO L231 Difference]: Finished difference. Result has 390 places, 910 transitions, 16483 flow [2024-06-21 21:04:38,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15985, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16483, PETRI_PLACES=390, PETRI_TRANSITIONS=910} [2024-06-21 21:04:38,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-21 21:04:38,828 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 910 transitions, 16483 flow [2024-06-21 21:04:38,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:38,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:38,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:38,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:04:38,828 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:38,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:38,828 INFO L85 PathProgramCache]: Analyzing trace with hash 73242703, now seen corresponding path program 6 times [2024-06-21 21:04:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177251529] [2024-06-21 21:04:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:38,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:40,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177251529] [2024-06-21 21:04:40,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177251529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:40,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:40,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:04:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952563850] [2024-06-21 21:04:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:40,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:04:40,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:04:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:04:40,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:04:40,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 910 transitions, 16483 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:40,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:40,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:04:40,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:44,545 INFO L124 PetriNetUnfolderBase]: 7613/11937 cut-off events. [2024-06-21 21:04:44,545 INFO L125 PetriNetUnfolderBase]: For 1986770/1986782 co-relation queries the response was YES. [2024-06-21 21:04:44,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125213 conditions, 11937 events. 7613/11937 cut-off events. For 1986770/1986782 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 77558 event pairs, 2038 based on Foata normal form. 34/11966 useless extension candidates. Maximal degree in co-relation 125033. Up to 9449 conditions per place. [2024-06-21 21:04:44,746 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 711 selfloop transitions, 247 changer transitions 0/975 dead transitions. [2024-06-21 21:04:44,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 975 transitions, 19185 flow [2024-06-21 21:04:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:04:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:04:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-21 21:04:44,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2024-06-21 21:04:44,748 INFO L175 Difference]: Start difference. First operand has 390 places, 910 transitions, 16483 flow. Second operand 11 states and 238 transitions. [2024-06-21 21:04:44,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 975 transitions, 19185 flow [2024-06-21 21:04:51,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 975 transitions, 19059 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 21:04:51,903 INFO L231 Difference]: Finished difference. Result has 397 places, 914 transitions, 17017 flow [2024-06-21 21:04:51,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16357, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17017, PETRI_PLACES=397, PETRI_TRANSITIONS=914} [2024-06-21 21:04:51,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-21 21:04:51,904 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 914 transitions, 17017 flow [2024-06-21 21:04:51,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:51,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:51,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:51,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:04:51,904 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:04:51,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash 73362673, now seen corresponding path program 7 times [2024-06-21 21:04:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:51,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846193253] [2024-06-21 21:04:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:51,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846193253] [2024-06-21 21:04:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846193253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:53,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:53,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:04:53,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431598557] [2024-06-21 21:04:53,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:04:53,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:04:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:04:53,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:04:53,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 914 transitions, 17017 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:53,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:53,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:04:53,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:57,891 INFO L124 PetriNetUnfolderBase]: 7749/12181 cut-off events. [2024-06-21 21:04:57,892 INFO L125 PetriNetUnfolderBase]: For 2075741/2075753 co-relation queries the response was YES. [2024-06-21 21:04:58,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128158 conditions, 12181 events. 7749/12181 cut-off events. For 2075741/2075753 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 79767 event pairs, 2153 based on Foata normal form. 46/12222 useless extension candidates. Maximal degree in co-relation 127976. Up to 10306 conditions per place. [2024-06-21 21:04:58,110 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 726 selfloop transitions, 235 changer transitions 0/978 dead transitions. [2024-06-21 21:04:58,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 978 transitions, 19367 flow [2024-06-21 21:04:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:04:58,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:04:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-06-21 21:04:58,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46503496503496505 [2024-06-21 21:04:58,112 INFO L175 Difference]: Start difference. First operand has 397 places, 914 transitions, 17017 flow. Second operand 13 states and 266 transitions. [2024-06-21 21:04:58,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 978 transitions, 19367 flow [2024-06-21 21:05:03,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 978 transitions, 19028 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 21:05:03,480 INFO L231 Difference]: Finished difference. Result has 403 places, 916 transitions, 17242 flow [2024-06-21 21:05:03,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16682, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17242, PETRI_PLACES=403, PETRI_TRANSITIONS=916} [2024-06-21 21:05:03,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-21 21:05:03,481 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 916 transitions, 17242 flow [2024-06-21 21:05:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:03,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:03,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:03,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:05:03,482 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:05:03,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 73358023, now seen corresponding path program 8 times [2024-06-21 21:05:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:03,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930540162] [2024-06-21 21:05:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:04,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:04,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930540162] [2024-06-21 21:05:04,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930540162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:04,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:04,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:05:04,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144116393] [2024-06-21 21:05:04,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:04,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:05:04,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:04,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:05:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:05:05,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 21:05:05,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 916 transitions, 17242 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:05,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:05,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 21:05:05,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:09,367 INFO L124 PetriNetUnfolderBase]: 7861/12365 cut-off events. [2024-06-21 21:05:09,367 INFO L125 PetriNetUnfolderBase]: For 2086590/2086602 co-relation queries the response was YES. [2024-06-21 21:05:09,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130528 conditions, 12365 events. 7861/12365 cut-off events. For 2086590/2086602 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 81388 event pairs, 2152 based on Foata normal form. 34/12394 useless extension candidates. Maximal degree in co-relation 130344. Up to 10280 conditions per place. [2024-06-21 21:05:09,576 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 722 selfloop transitions, 242 changer transitions 0/981 dead transitions. [2024-06-21 21:05:09,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 981 transitions, 19598 flow [2024-06-21 21:05:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:05:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:05:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-21 21:05:09,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-21 21:05:09,578 INFO L175 Difference]: Start difference. First operand has 403 places, 916 transitions, 17242 flow. Second operand 12 states and 254 transitions. [2024-06-21 21:05:09,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 981 transitions, 19598 flow