./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix019_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/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix019_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-7724a2d-m [2024-06-28 03:07:45,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:07:45,712 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:07:45,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:07:45,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:07:45,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:07:45,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:07:45,740 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:07:45,741 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:07:45,744 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:07:45,744 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:07:45,744 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:07:45,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:07:45,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:07:45,746 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:07:45,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:07:45,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:07:45,747 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:07:45,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:07:45,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:07:45,748 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:07:45,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:07:45,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:07:45,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:07:45,749 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:07:45,749 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:07:45,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:07:45,749 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:07:45,750 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:07:45,750 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:07:45,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:07:45,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:07:45,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:07:45,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:07:45,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:07:45,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:07:45,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:07:45,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:07:45,752 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:07:45,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:07:45,752 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:07:45,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:07:45,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:07:45,753 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:07:45,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:07:45,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:07:45,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:07:45,981 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:07:45,981 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:07:45,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-28 03:07:46,183 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:07:46,183 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:07:46,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:07:47,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:07:47,341 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:07:47,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:07:47,358 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/728c96352/75c29946e67b4ffca105f73183dcce41/FLAG8def98e15 [2024-06-28 03:07:47,368 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/728c96352/75c29946e67b4ffca105f73183dcce41 [2024-06-28 03:07:47,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:07:47,369 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:07:47,370 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:07:47,370 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:07:47,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:07:47,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:07:46" (1/2) ... [2024-06-28 03:07:47,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e923b5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:07:47, skipping insertion in model container [2024-06-28 03:07:47,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:07:46" (1/2) ... [2024-06-28 03:07:47,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ea38547 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:07:47, skipping insertion in model container [2024-06-28 03:07:47,379 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:07:47" (2/2) ... [2024-06-28 03:07:47,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e923b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47, skipping insertion in model container [2024-06-28 03:07:47,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:07:47" (2/2) ... [2024-06-28 03:07:47,381 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:07:47,445 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:07:47,447 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-28 03:07:47,447 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-28 03:07:47,447 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-28 03:07:47,447 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:07:47,448 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-28 03:07:47,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:07:47,845 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:07:47,857 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:07:47,948 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:07:47,982 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:07:47,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47 WrapperNode [2024-06-28 03:07:47,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:07:47,983 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:07:47,983 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:07:47,983 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:07:47,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,000 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,022 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-28 03:07:48,023 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:07:48,024 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:07:48,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:07:48,024 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:07:48,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,032 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,035 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,047 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 03:07:48,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,057 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,059 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:07:48,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:07:48,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:07:48,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:07:48,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (1/1) ... [2024-06-28 03:07:48,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:07:48,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:07:48,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 03:07:48,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 03:07:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:07:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:07:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:07:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:07:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:07:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:07:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:07:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:07:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:07:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:07:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:07:48,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:07:48,153 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:07:48,281 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:07:48,283 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:07:48,552 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:07:48,552 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:07:48,758 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:07:48,759 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:07:48,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:07:48 BoogieIcfgContainer [2024-06-28 03:07:48,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:07:48,762 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:07:48,762 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:07:48,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:07:48,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:07:46" (1/4) ... [2024-06-28 03:07:48,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ece3ba0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:07:48, skipping insertion in model container [2024-06-28 03:07:48,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:07:47" (2/4) ... [2024-06-28 03:07:48,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ece3ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:07:48, skipping insertion in model container [2024-06-28 03:07:48,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:07:47" (3/4) ... [2024-06-28 03:07:48,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ece3ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:07:48, skipping insertion in model container [2024-06-28 03:07:48,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:07:48" (4/4) ... [2024-06-28 03:07:48,768 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:07:48,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:07:48,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:07:48,782 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:07:48,825 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:07:48,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:07:48,881 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 03:07:48,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:07:48,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:07:48,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:07:48,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 03:07:48,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:07:48,905 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;@53e68034, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:07:48,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:07:48,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:07:48,910 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 03:07:48,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:07:48,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:48,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:07:48,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:48,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash 373697404, now seen corresponding path program 1 times [2024-06-28 03:07:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:48,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51219617] [2024-06-28 03:07:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:48,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:49,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:49,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51219617] [2024-06-28 03:07:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51219617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:49,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:49,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:07:49,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523204509] [2024-06-28 03:07:49,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:07:49,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:07:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:07:49,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 03:07:49,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:49,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:49,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 03:07:49,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:50,128 INFO L124 PetriNetUnfolderBase]: 1363/2122 cut-off events. [2024-06-28 03:07:50,128 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-28 03:07:50,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 2122 events. 1363/2122 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10298 event pairs, 964 based on Foata normal form. 1/2071 useless extension candidates. Maximal degree in co-relation 4234. Up to 2037 conditions per place. [2024-06-28 03:07:50,141 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-28 03:07:50,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-28 03:07:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:07:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:07:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-28 03:07:50,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-28 03:07:50,151 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 75 transitions. [2024-06-28 03:07:50,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-28 03:07:50,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:07:50,157 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 03:07:50,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 03:07:50,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 03:07:50,161 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 03:07:50,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:50,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:50,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:50,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:07:50,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:50,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:50,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1653924427, now seen corresponding path program 1 times [2024-06-28 03:07:50,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:50,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772370189] [2024-06-28 03:07:50,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:50,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:50,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:50,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772370189] [2024-06-28 03:07:50,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772370189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:50,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:50,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:07:50,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884642264] [2024-06-28 03:07:50,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:50,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:07:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:50,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:07:50,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:07:50,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 03:07:50,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:50,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:50,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 03:07:50,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:51,002 INFO L124 PetriNetUnfolderBase]: 1357/2118 cut-off events. [2024-06-28 03:07:51,002 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-28 03:07:51,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4785 conditions, 2118 events. 1357/2118 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10348 event pairs, 840 based on Foata normal form. 3/2108 useless extension candidates. Maximal degree in co-relation 4773. Up to 2013 conditions per place. [2024-06-28 03:07:51,013 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-28 03:07:51,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-28 03:07:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:07:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:07:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-28 03:07:51,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-28 03:07:51,016 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 97 transitions. [2024-06-28 03:07:51,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-28 03:07:51,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:07:51,019 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-28 03:07:51,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 03:07:51,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-28 03:07:51,020 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-28 03:07:51,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:51,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:51,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:51,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:07:51,023 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)] === [2024-06-28 03:07:51,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash 267951523, now seen corresponding path program 1 times [2024-06-28 03:07:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:51,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163459208] [2024-06-28 03:07:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:51,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:51,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163459208] [2024-06-28 03:07:51,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163459208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:51,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:51,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:07:51,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125674020] [2024-06-28 03:07:51,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:51,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:07:51,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:51,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:07:51,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:07:51,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 03:07:51,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:51,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:51,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 03:07:51,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:51,908 INFO L124 PetriNetUnfolderBase]: 1411/2217 cut-off events. [2024-06-28 03:07:51,908 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-28 03:07:51,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5545 conditions, 2217 events. 1411/2217 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10878 event pairs, 629 based on Foata normal form. 7/2217 useless extension candidates. Maximal degree in co-relation 5531. Up to 1982 conditions per place. [2024-06-28 03:07:51,920 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 54 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-28 03:07:51,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 400 flow [2024-06-28 03:07:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:07:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:07:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-28 03:07:51,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-28 03:07:51,924 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 129 transitions. [2024-06-28 03:07:51,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 400 flow [2024-06-28 03:07:51,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:07:51,926 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 237 flow [2024-06-28 03:07:51,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-28 03:07:51,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-28 03:07:51,927 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 237 flow [2024-06-28 03:07:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:51,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:51,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:07:51,928 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:51,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -366553030, now seen corresponding path program 1 times [2024-06-28 03:07:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:51,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195781963] [2024-06-28 03:07:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:52,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:52,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195781963] [2024-06-28 03:07:52,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195781963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:52,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:52,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:07:52,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587171459] [2024-06-28 03:07:52,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:52,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:07:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:52,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:07:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:07:52,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 03:07:52,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:52,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:52,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 03:07:52,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:53,021 INFO L124 PetriNetUnfolderBase]: 1433/2262 cut-off events. [2024-06-28 03:07:53,022 INFO L125 PetriNetUnfolderBase]: For 2845/2845 co-relation queries the response was YES. [2024-06-28 03:07:53,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6827 conditions, 2262 events. 1433/2262 cut-off events. For 2845/2845 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11244 event pairs, 476 based on Foata normal form. 7/2265 useless extension candidates. Maximal degree in co-relation 6810. Up to 1925 conditions per place. [2024-06-28 03:07:53,035 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 28 changer transitions 0/99 dead transitions. [2024-06-28 03:07:53,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 629 flow [2024-06-28 03:07:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:07:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:07:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-28 03:07:53,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-28 03:07:53,036 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 237 flow. Second operand 6 states and 156 transitions. [2024-06-28 03:07:53,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 629 flow [2024-06-28 03:07:53,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 621 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:07:53,040 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 416 flow [2024-06-28 03:07:53,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-06-28 03:07:53,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-28 03:07:53,041 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 416 flow [2024-06-28 03:07:53,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:53,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:53,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:53,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:07:53,042 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)] === [2024-06-28 03:07:53,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1521759228, now seen corresponding path program 1 times [2024-06-28 03:07:53,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:53,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322673575] [2024-06-28 03:07:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:53,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:53,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:53,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322673575] [2024-06-28 03:07:53,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322673575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:53,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:53,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:07:53,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458428905] [2024-06-28 03:07:53,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:07:53,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:07:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:07:53,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 03:07:53,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-28 03:07:53,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:53,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 03:07:53,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:54,289 INFO L124 PetriNetUnfolderBase]: 1515/2406 cut-off events. [2024-06-28 03:07:54,289 INFO L125 PetriNetUnfolderBase]: For 5688/5688 co-relation queries the response was YES. [2024-06-28 03:07:54,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8536 conditions, 2406 events. 1515/2406 cut-off events. For 5688/5688 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12265 event pairs, 348 based on Foata normal form. 26/2428 useless extension candidates. Maximal degree in co-relation 8513. Up to 1889 conditions per place. [2024-06-28 03:07:54,305 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 73 selfloop transitions, 30 changer transitions 0/109 dead transitions. [2024-06-28 03:07:54,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 109 transitions, 804 flow [2024-06-28 03:07:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:07:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:07:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 03:07:54,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-28 03:07:54,306 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 416 flow. Second operand 7 states and 178 transitions. [2024-06-28 03:07:54,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 109 transitions, 804 flow [2024-06-28 03:07:54,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 788 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 03:07:54,313 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 482 flow [2024-06-28 03:07:54,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=482, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-06-28 03:07:54,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-28 03:07:54,314 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 482 flow [2024-06-28 03:07:54,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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) [2024-06-28 03:07:54,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:54,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:54,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:07:54,315 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:54,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 825546214, now seen corresponding path program 1 times [2024-06-28 03:07:54,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:54,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44336224] [2024-06-28 03:07:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:54,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:54,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44336224] [2024-06-28 03:07:54,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44336224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:54,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:54,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:07:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271833705] [2024-06-28 03:07:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:54,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:07:54,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:07:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:07:54,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:07:54,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 482 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:54,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:54,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:07:54,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:55,173 INFO L124 PetriNetUnfolderBase]: 1505/2396 cut-off events. [2024-06-28 03:07:55,173 INFO L125 PetriNetUnfolderBase]: For 6994/6994 co-relation queries the response was YES. [2024-06-28 03:07:55,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8967 conditions, 2396 events. 1505/2396 cut-off events. For 6994/6994 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12226 event pairs, 531 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 8940. Up to 2254 conditions per place. [2024-06-28 03:07:55,194 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 59 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-28 03:07:55,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 648 flow [2024-06-28 03:07:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:07:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:07:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-28 03:07:55,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-28 03:07:55,195 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 482 flow. Second operand 5 states and 96 transitions. [2024-06-28 03:07:55,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 648 flow [2024-06-28 03:07:55,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 578 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 03:07:55,202 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 442 flow [2024-06-28 03:07:55,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=442, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-06-28 03:07:55,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-28 03:07:55,205 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 442 flow [2024-06-28 03:07:55,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:55,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:55,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:55,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:07:55,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:55,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:55,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1001015545, now seen corresponding path program 1 times [2024-06-28 03:07:55,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:55,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253078887] [2024-06-28 03:07:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:55,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:55,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253078887] [2024-06-28 03:07:55,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253078887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:55,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:55,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:07:55,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757922114] [2024-06-28 03:07:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:55,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:07:55,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:07:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:07:55,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:07:55,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 442 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) [2024-06-28 03:07:55,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:55,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:07:55,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:56,281 INFO L124 PetriNetUnfolderBase]: 1633/2576 cut-off events. [2024-06-28 03:07:56,282 INFO L125 PetriNetUnfolderBase]: For 8710/8710 co-relation queries the response was YES. [2024-06-28 03:07:56,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9849 conditions, 2576 events. 1633/2576 cut-off events. For 8710/8710 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13209 event pairs, 824 based on Foata normal form. 8/2567 useless extension candidates. Maximal degree in co-relation 9820. Up to 2330 conditions per place. [2024-06-28 03:07:56,297 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 72 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-28 03:07:56,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 855 flow [2024-06-28 03:07:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:07:56,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:07:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 03:07:56,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-28 03:07:56,299 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 442 flow. Second operand 7 states and 132 transitions. [2024-06-28 03:07:56,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 855 flow [2024-06-28 03:07:56,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 822 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 03:07:56,308 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 624 flow [2024-06-28 03:07:56,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=624, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-06-28 03:07:56,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-28 03:07:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 624 flow [2024-06-28 03:07:56,309 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) [2024-06-28 03:07:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:56,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:56,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:07:56,309 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)] === [2024-06-28 03:07:56,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash -694460595, now seen corresponding path program 2 times [2024-06-28 03:07:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:56,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924192882] [2024-06-28 03:07:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:56,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:56,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924192882] [2024-06-28 03:07:56,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924192882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:56,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:56,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:07:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98086235] [2024-06-28 03:07:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:07:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:07:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:07:56,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:07:56,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 624 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) [2024-06-28 03:07:56,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:56,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:07:56,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:57,313 INFO L124 PetriNetUnfolderBase]: 1715/2721 cut-off events. [2024-06-28 03:07:57,313 INFO L125 PetriNetUnfolderBase]: For 11375/11393 co-relation queries the response was YES. [2024-06-28 03:07:57,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11153 conditions, 2721 events. 1715/2721 cut-off events. For 11375/11393 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13975 event pairs, 487 based on Foata normal form. 20/2738 useless extension candidates. Maximal degree in co-relation 11122. Up to 2338 conditions per place. [2024-06-28 03:07:57,330 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 84 selfloop transitions, 43 changer transitions 0/132 dead transitions. [2024-06-28 03:07:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 132 transitions, 1344 flow [2024-06-28 03:07:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:07:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:07:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 03:07:57,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-28 03:07:57,332 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 624 flow. Second operand 7 states and 144 transitions. [2024-06-28 03:07:57,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 132 transitions, 1344 flow [2024-06-28 03:07:57,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 1311 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 03:07:57,343 INFO L231 Difference]: Finished difference. Result has 77 places, 102 transitions, 1045 flow [2024-06-28 03:07:57,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1045, PETRI_PLACES=77, PETRI_TRANSITIONS=102} [2024-06-28 03:07:57,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-28 03:07:57,345 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 102 transitions, 1045 flow [2024-06-28 03:07:57,346 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) [2024-06-28 03:07:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:57,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:57,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:07:57,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:57,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1218991803, now seen corresponding path program 3 times [2024-06-28 03:07:57,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:57,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754100226] [2024-06-28 03:07:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:57,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:57,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:57,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754100226] [2024-06-28 03:07:57,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754100226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:57,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:57,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:07:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059661469] [2024-06-28 03:07:57,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:57,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:07:57,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:57,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:07:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:07:57,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:07:57,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 1045 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) [2024-06-28 03:07:57,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:57,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:07:57,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:07:58,340 INFO L124 PetriNetUnfolderBase]: 1682/2655 cut-off events. [2024-06-28 03:07:58,341 INFO L125 PetriNetUnfolderBase]: For 13823/13823 co-relation queries the response was YES. [2024-06-28 03:07:58,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11670 conditions, 2655 events. 1682/2655 cut-off events. For 13823/13823 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13564 event pairs, 823 based on Foata normal form. 6/2647 useless extension candidates. Maximal degree in co-relation 11635. Up to 2491 conditions per place. [2024-06-28 03:07:58,357 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2024-06-28 03:07:58,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 1334 flow [2024-06-28 03:07:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:07:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:07:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-28 03:07:58,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-28 03:07:58,359 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 1045 flow. Second operand 6 states and 113 transitions. [2024-06-28 03:07:58,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 1334 flow [2024-06-28 03:07:58,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 1307 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 03:07:58,374 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 1061 flow [2024-06-28 03:07:58,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1061, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2024-06-28 03:07:58,375 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 03:07:58,375 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 1061 flow [2024-06-28 03:07:58,376 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) [2024-06-28 03:07:58,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:07:58,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:07:58,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:07:58,376 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:07:58,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:07:58,376 INFO L85 PathProgramCache]: Analyzing trace with hash -264966119, now seen corresponding path program 1 times [2024-06-28 03:07:58,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:07:58,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248579889] [2024-06-28 03:07:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:07:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:07:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:07:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:07:59,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:07:59,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248579889] [2024-06-28 03:07:59,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248579889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:07:59,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:07:59,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:07:59,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23833314] [2024-06-28 03:07:59,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:07:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:07:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:07:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:07:59,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:07:59,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:07:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 1061 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:07:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:07:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:07:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:00,145 INFO L124 PetriNetUnfolderBase]: 2080/3209 cut-off events. [2024-06-28 03:08:00,145 INFO L125 PetriNetUnfolderBase]: For 18323/18323 co-relation queries the response was YES. [2024-06-28 03:08:00,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14235 conditions, 3209 events. 2080/3209 cut-off events. For 18323/18323 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15809 event pairs, 1036 based on Foata normal form. 4/3198 useless extension candidates. Maximal degree in co-relation 14198. Up to 3058 conditions per place. [2024-06-28 03:08:00,168 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2024-06-28 03:08:00,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 126 transitions, 1414 flow [2024-06-28 03:08:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:08:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:08:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 03:08:00,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-28 03:08:00,170 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 1061 flow. Second operand 7 states and 124 transitions. [2024-06-28 03:08:00,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 126 transitions, 1414 flow [2024-06-28 03:08:00,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 1348 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:08:00,189 INFO L231 Difference]: Finished difference. Result has 85 places, 107 transitions, 1097 flow [2024-06-28 03:08:00,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1097, PETRI_PLACES=85, PETRI_TRANSITIONS=107} [2024-06-28 03:08:00,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-28 03:08:00,191 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 107 transitions, 1097 flow [2024-06-28 03:08:00,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:00,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:00,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:00,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:08:00,191 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:00,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1427139841, now seen corresponding path program 1 times [2024-06-28 03:08:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:00,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661853110] [2024-06-28 03:08:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:00,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:00,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661853110] [2024-06-28 03:08:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661853110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:00,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:00,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:08:00,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024638631] [2024-06-28 03:08:00,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:08:00,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:08:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:08:00,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:00,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 107 transitions, 1097 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:00,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:00,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:00,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:01,157 INFO L124 PetriNetUnfolderBase]: 2329/3500 cut-off events. [2024-06-28 03:08:01,157 INFO L125 PetriNetUnfolderBase]: For 22219/22219 co-relation queries the response was YES. [2024-06-28 03:08:01,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16023 conditions, 3500 events. 2329/3500 cut-off events. For 22219/22219 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16677 event pairs, 1191 based on Foata normal form. 1/3500 useless extension candidates. Maximal degree in co-relation 15984. Up to 3456 conditions per place. [2024-06-28 03:08:01,178 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 105 selfloop transitions, 9 changer transitions 0/117 dead transitions. [2024-06-28 03:08:01,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 117 transitions, 1369 flow [2024-06-28 03:08:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:08:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:08:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-28 03:08:01,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-28 03:08:01,180 INFO L175 Difference]: Start difference. First operand has 85 places, 107 transitions, 1097 flow. Second operand 5 states and 83 transitions. [2024-06-28 03:08:01,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 117 transitions, 1369 flow [2024-06-28 03:08:01,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 1326 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 03:08:01,232 INFO L231 Difference]: Finished difference. Result has 86 places, 110 transitions, 1108 flow [2024-06-28 03:08:01,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1108, PETRI_PLACES=86, PETRI_TRANSITIONS=110} [2024-06-28 03:08:01,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-28 03:08:01,233 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 110 transitions, 1108 flow [2024-06-28 03:08:01,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:01,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:01,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:01,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:08:01,233 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:01,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:01,234 INFO L85 PathProgramCache]: Analyzing trace with hash -154037586, now seen corresponding path program 1 times [2024-06-28 03:08:01,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:01,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419668496] [2024-06-28 03:08:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:01,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:02,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:02,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419668496] [2024-06-28 03:08:02,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419668496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:02,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:02,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:02,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076750125] [2024-06-28 03:08:02,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:02,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:02,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:02,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:02,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:02,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 110 transitions, 1108 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) [2024-06-28 03:08:02,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:02,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:02,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:02,868 INFO L124 PetriNetUnfolderBase]: 2047/3180 cut-off events. [2024-06-28 03:08:02,868 INFO L125 PetriNetUnfolderBase]: For 24507/24533 co-relation queries the response was YES. [2024-06-28 03:08:02,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15046 conditions, 3180 events. 2047/3180 cut-off events. For 24507/24533 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16378 event pairs, 607 based on Foata normal form. 22/3187 useless extension candidates. Maximal degree in co-relation 15006. Up to 2687 conditions per place. [2024-06-28 03:08:02,887 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 97 selfloop transitions, 55 changer transitions 0/159 dead transitions. [2024-06-28 03:08:02,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 159 transitions, 1683 flow [2024-06-28 03:08:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-28 03:08:02,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-28 03:08:02,889 INFO L175 Difference]: Start difference. First operand has 86 places, 110 transitions, 1108 flow. Second operand 9 states and 180 transitions. [2024-06-28 03:08:02,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 159 transitions, 1683 flow [2024-06-28 03:08:02,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1651 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 03:08:02,911 INFO L231 Difference]: Finished difference. Result has 93 places, 120 transitions, 1292 flow [2024-06-28 03:08:02,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1292, PETRI_PLACES=93, PETRI_TRANSITIONS=120} [2024-06-28 03:08:02,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-28 03:08:02,911 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 120 transitions, 1292 flow [2024-06-28 03:08:02,912 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) [2024-06-28 03:08:02,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:02,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:02,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:08:02,912 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:02,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:02,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1894397134, now seen corresponding path program 2 times [2024-06-28 03:08:02,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:02,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551471906] [2024-06-28 03:08:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:02,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:03,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551471906] [2024-06-28 03:08:03,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551471906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:03,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:03,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401599705] [2024-06-28 03:08:03,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:03,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:03,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:03,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:03,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 120 transitions, 1292 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) [2024-06-28 03:08:03,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:03,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:03,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:04,352 INFO L124 PetriNetUnfolderBase]: 2153/3351 cut-off events. [2024-06-28 03:08:04,352 INFO L125 PetriNetUnfolderBase]: For 30093/30117 co-relation queries the response was YES. [2024-06-28 03:08:04,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16910 conditions, 3351 events. 2153/3351 cut-off events. For 30093/30117 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17386 event pairs, 580 based on Foata normal form. 22/3362 useless extension candidates. Maximal degree in co-relation 16868. Up to 2660 conditions per place. [2024-06-28 03:08:04,371 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 103 selfloop transitions, 85 changer transitions 0/195 dead transitions. [2024-06-28 03:08:04,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 195 transitions, 2226 flow [2024-06-28 03:08:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:08:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:08:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-28 03:08:04,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-28 03:08:04,373 INFO L175 Difference]: Start difference. First operand has 93 places, 120 transitions, 1292 flow. Second operand 10 states and 208 transitions. [2024-06-28 03:08:04,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 195 transitions, 2226 flow [2024-06-28 03:08:04,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 195 transitions, 2146 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:04,398 INFO L231 Difference]: Finished difference. Result has 100 places, 144 transitions, 1692 flow [2024-06-28 03:08:04,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1692, PETRI_PLACES=100, PETRI_TRANSITIONS=144} [2024-06-28 03:08:04,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-28 03:08:04,399 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 144 transitions, 1692 flow [2024-06-28 03:08:04,399 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) [2024-06-28 03:08:04,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:04,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:04,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:08:04,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:04,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:04,400 INFO L85 PathProgramCache]: Analyzing trace with hash -831566846, now seen corresponding path program 3 times [2024-06-28 03:08:04,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:04,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525948548] [2024-06-28 03:08:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:04,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:05,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525948548] [2024-06-28 03:08:05,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525948548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:05,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:05,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206146053] [2024-06-28 03:08:05,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:05,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:05,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 144 transitions, 1692 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) [2024-06-28 03:08:05,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:05,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:05,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:05,782 INFO L124 PetriNetUnfolderBase]: 2131/3325 cut-off events. [2024-06-28 03:08:05,782 INFO L125 PetriNetUnfolderBase]: For 34643/34671 co-relation queries the response was YES. [2024-06-28 03:08:05,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17878 conditions, 3325 events. 2131/3325 cut-off events. For 34643/34671 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17332 event pairs, 588 based on Foata normal form. 26/3340 useless extension candidates. Maximal degree in co-relation 17832. Up to 2642 conditions per place. [2024-06-28 03:08:05,800 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 86 selfloop transitions, 86 changer transitions 0/179 dead transitions. [2024-06-28 03:08:05,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 179 transitions, 2189 flow [2024-06-28 03:08:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 03:08:05,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-28 03:08:05,801 INFO L175 Difference]: Start difference. First operand has 100 places, 144 transitions, 1692 flow. Second operand 8 states and 161 transitions. [2024-06-28 03:08:05,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 179 transitions, 2189 flow [2024-06-28 03:08:05,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 179 transitions, 2048 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:05,837 INFO L231 Difference]: Finished difference. Result has 102 places, 144 transitions, 1753 flow [2024-06-28 03:08:05,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1753, PETRI_PLACES=102, PETRI_TRANSITIONS=144} [2024-06-28 03:08:05,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-28 03:08:05,837 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 144 transitions, 1753 flow [2024-06-28 03:08:05,838 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) [2024-06-28 03:08:05,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:05,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:05,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:08:05,838 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:05,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:05,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1082621924, now seen corresponding path program 1 times [2024-06-28 03:08:05,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:05,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142595018] [2024-06-28 03:08:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:05,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:06,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:06,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142595018] [2024-06-28 03:08:06,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142595018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:06,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:06,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:06,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835953746] [2024-06-28 03:08:06,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:06,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:06,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:06,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:06,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 144 transitions, 1753 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:06,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:06,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:07,472 INFO L124 PetriNetUnfolderBase]: 2451/3750 cut-off events. [2024-06-28 03:08:07,472 INFO L125 PetriNetUnfolderBase]: For 38470/38484 co-relation queries the response was YES. [2024-06-28 03:08:07,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20639 conditions, 3750 events. 2451/3750 cut-off events. For 38470/38484 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18842 event pairs, 1110 based on Foata normal form. 2/3729 useless extension candidates. Maximal degree in co-relation 20592. Up to 3540 conditions per place. [2024-06-28 03:08:07,496 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 144 selfloop transitions, 25 changer transitions 0/174 dead transitions. [2024-06-28 03:08:07,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 2321 flow [2024-06-28 03:08:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:08:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:08:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:08:07,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-28 03:08:07,497 INFO L175 Difference]: Start difference. First operand has 102 places, 144 transitions, 1753 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:08:07,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 2321 flow [2024-06-28 03:08:07,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 2133 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:07,533 INFO L231 Difference]: Finished difference. Result has 103 places, 152 transitions, 1788 flow [2024-06-28 03:08:07,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=103, PETRI_TRANSITIONS=152} [2024-06-28 03:08:07,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-28 03:08:07,533 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 152 transitions, 1788 flow [2024-06-28 03:08:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:07,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:07,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:07,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:08:07,534 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:07,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1276466911, now seen corresponding path program 1 times [2024-06-28 03:08:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:07,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668808126] [2024-06-28 03:08:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:08,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:08,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668808126] [2024-06-28 03:08:08,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668808126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:08,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:08,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:08:08,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137247413] [2024-06-28 03:08:08,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:08,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:08:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:08:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:08:08,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:08,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 152 transitions, 1788 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:08,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:08,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:08,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:08,704 INFO L124 PetriNetUnfolderBase]: 2568/3864 cut-off events. [2024-06-28 03:08:08,704 INFO L125 PetriNetUnfolderBase]: For 34556/34556 co-relation queries the response was YES. [2024-06-28 03:08:08,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20409 conditions, 3864 events. 2568/3864 cut-off events. For 34556/34556 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18685 event pairs, 1208 based on Foata normal form. 3/3866 useless extension candidates. Maximal degree in co-relation 20362. Up to 3795 conditions per place. [2024-06-28 03:08:08,723 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 150 selfloop transitions, 12 changer transitions 0/165 dead transitions. [2024-06-28 03:08:08,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 165 transitions, 2168 flow [2024-06-28 03:08:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:08:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:08:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 03:08:08,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-28 03:08:08,724 INFO L175 Difference]: Start difference. First operand has 103 places, 152 transitions, 1788 flow. Second operand 6 states and 97 transitions. [2024-06-28 03:08:08,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 165 transitions, 2168 flow [2024-06-28 03:08:08,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 165 transitions, 2077 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:08,756 INFO L231 Difference]: Finished difference. Result has 103 places, 155 transitions, 1761 flow [2024-06-28 03:08:08,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1761, PETRI_PLACES=103, PETRI_TRANSITIONS=155} [2024-06-28 03:08:08,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-28 03:08:08,756 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 155 transitions, 1761 flow [2024-06-28 03:08:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:08,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:08,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:08:08,757 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)] === [2024-06-28 03:08:08,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:08,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1963334028, now seen corresponding path program 1 times [2024-06-28 03:08:08,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:08,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329043081] [2024-06-28 03:08:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:08,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329043081] [2024-06-28 03:08:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329043081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:09,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:09,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:09,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55095907] [2024-06-28 03:08:09,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:09,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:09,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:09,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:09,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 155 transitions, 1761 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) [2024-06-28 03:08:09,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:09,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:09,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:10,378 INFO L124 PetriNetUnfolderBase]: 2515/3933 cut-off events. [2024-06-28 03:08:10,378 INFO L125 PetriNetUnfolderBase]: For 40134/40164 co-relation queries the response was YES. [2024-06-28 03:08:10,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 3933 events. 2515/3933 cut-off events. For 40134/40164 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21518 event pairs, 613 based on Foata normal form. 40/3946 useless extension candidates. Maximal degree in co-relation 20899. Up to 2959 conditions per place. [2024-06-28 03:08:10,403 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 147 selfloop transitions, 55 changer transitions 0/209 dead transitions. [2024-06-28 03:08:10,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 209 transitions, 2509 flow [2024-06-28 03:08:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 03:08:10,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-28 03:08:10,407 INFO L175 Difference]: Start difference. First operand has 103 places, 155 transitions, 1761 flow. Second operand 9 states and 185 transitions. [2024-06-28 03:08:10,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 209 transitions, 2509 flow [2024-06-28 03:08:10,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 209 transitions, 2467 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 03:08:10,443 INFO L231 Difference]: Finished difference. Result has 109 places, 159 transitions, 1896 flow [2024-06-28 03:08:10,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1896, PETRI_PLACES=109, PETRI_TRANSITIONS=159} [2024-06-28 03:08:10,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-28 03:08:10,444 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 159 transitions, 1896 flow [2024-06-28 03:08:10,444 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) [2024-06-28 03:08:10,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:10,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:08:10,444 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)] === [2024-06-28 03:08:10,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1505304610, now seen corresponding path program 2 times [2024-06-28 03:08:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:10,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099468892] [2024-06-28 03:08:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:10,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:11,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:11,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099468892] [2024-06-28 03:08:11,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099468892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:11,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:11,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:11,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035925417] [2024-06-28 03:08:11,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:11,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:11,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:11,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:11,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:11,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:11,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 159 transitions, 1896 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) [2024-06-28 03:08:11,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:11,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:12,050 INFO L124 PetriNetUnfolderBase]: 2603/4085 cut-off events. [2024-06-28 03:08:12,050 INFO L125 PetriNetUnfolderBase]: For 46160/46190 co-relation queries the response was YES. [2024-06-28 03:08:12,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22319 conditions, 4085 events. 2603/4085 cut-off events. For 46160/46190 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22602 event pairs, 693 based on Foata normal form. 44/4116 useless extension candidates. Maximal degree in co-relation 22269. Up to 3391 conditions per place. [2024-06-28 03:08:12,078 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 144 selfloop transitions, 56 changer transitions 0/207 dead transitions. [2024-06-28 03:08:12,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 207 transitions, 2573 flow [2024-06-28 03:08:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-28 03:08:12,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-28 03:08:12,079 INFO L175 Difference]: Start difference. First operand has 109 places, 159 transitions, 1896 flow. Second operand 9 states and 180 transitions. [2024-06-28 03:08:12,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 207 transitions, 2573 flow [2024-06-28 03:08:12,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 207 transitions, 2499 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:12,127 INFO L231 Difference]: Finished difference. Result has 113 places, 163 transitions, 1994 flow [2024-06-28 03:08:12,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1994, PETRI_PLACES=113, PETRI_TRANSITIONS=163} [2024-06-28 03:08:12,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-28 03:08:12,127 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 163 transitions, 1994 flow [2024-06-28 03:08:12,128 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) [2024-06-28 03:08:12,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:12,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:12,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:08:12,128 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)] === [2024-06-28 03:08:12,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1840774908, now seen corresponding path program 3 times [2024-06-28 03:08:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:12,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480477522] [2024-06-28 03:08:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:12,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480477522] [2024-06-28 03:08:12,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480477522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:12,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:12,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:12,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021501647] [2024-06-28 03:08:12,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:12,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:12,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:12,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 163 transitions, 1994 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) [2024-06-28 03:08:12,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:12,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:12,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:13,734 INFO L124 PetriNetUnfolderBase]: 2728/4291 cut-off events. [2024-06-28 03:08:13,734 INFO L125 PetriNetUnfolderBase]: For 53906/53936 co-relation queries the response was YES. [2024-06-28 03:08:13,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23676 conditions, 4291 events. 2728/4291 cut-off events. For 53906/53936 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23969 event pairs, 686 based on Foata normal form. 64/4341 useless extension candidates. Maximal degree in co-relation 23624. Up to 3559 conditions per place. [2024-06-28 03:08:13,766 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 149 selfloop transitions, 54 changer transitions 0/210 dead transitions. [2024-06-28 03:08:13,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 210 transitions, 2673 flow [2024-06-28 03:08:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 03:08:13,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-28 03:08:13,770 INFO L175 Difference]: Start difference. First operand has 113 places, 163 transitions, 1994 flow. Second operand 9 states and 181 transitions. [2024-06-28 03:08:13,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 210 transitions, 2673 flow [2024-06-28 03:08:13,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 210 transitions, 2575 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:13,819 INFO L231 Difference]: Finished difference. Result has 117 places, 166 transitions, 2066 flow [2024-06-28 03:08:13,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2066, PETRI_PLACES=117, PETRI_TRANSITIONS=166} [2024-06-28 03:08:13,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-28 03:08:13,820 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 166 transitions, 2066 flow [2024-06-28 03:08:13,820 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) [2024-06-28 03:08:13,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:13,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:13,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:08:13,821 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)] === [2024-06-28 03:08:13,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1528755520, now seen corresponding path program 4 times [2024-06-28 03:08:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:13,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094508429] [2024-06-28 03:08:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:13,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:14,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:14,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094508429] [2024-06-28 03:08:14,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094508429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:14,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:14,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:14,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890751380] [2024-06-28 03:08:14,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:14,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:14,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:14,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:14,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 166 transitions, 2066 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) [2024-06-28 03:08:14,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:14,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:14,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:15,357 INFO L124 PetriNetUnfolderBase]: 3370/5415 cut-off events. [2024-06-28 03:08:15,357 INFO L125 PetriNetUnfolderBase]: For 68426/68469 co-relation queries the response was YES. [2024-06-28 03:08:15,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29507 conditions, 5415 events. 3370/5415 cut-off events. For 68426/68469 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33056 event pairs, 596 based on Foata normal form. 52/5442 useless extension candidates. Maximal degree in co-relation 29454. Up to 2583 conditions per place. [2024-06-28 03:08:15,389 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 104 changer transitions 0/228 dead transitions. [2024-06-28 03:08:15,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 228 transitions, 3054 flow [2024-06-28 03:08:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-28 03:08:15,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-28 03:08:15,390 INFO L175 Difference]: Start difference. First operand has 117 places, 166 transitions, 2066 flow. Second operand 8 states and 175 transitions. [2024-06-28 03:08:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 228 transitions, 3054 flow [2024-06-28 03:08:15,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 228 transitions, 2887 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 03:08:15,450 INFO L231 Difference]: Finished difference. Result has 119 places, 179 transitions, 2371 flow [2024-06-28 03:08:15,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2371, PETRI_PLACES=119, PETRI_TRANSITIONS=179} [2024-06-28 03:08:15,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-28 03:08:15,450 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 179 transitions, 2371 flow [2024-06-28 03:08:15,451 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) [2024-06-28 03:08:15,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:15,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:15,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:08:15,451 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)] === [2024-06-28 03:08:15,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1440221100, now seen corresponding path program 5 times [2024-06-28 03:08:15,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:15,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585437402] [2024-06-28 03:08:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:15,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:16,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:16,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585437402] [2024-06-28 03:08:16,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585437402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:16,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:16,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:16,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775023824] [2024-06-28 03:08:16,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:16,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:16,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:16,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:16,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 179 transitions, 2371 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) [2024-06-28 03:08:16,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:16,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:16,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:17,071 INFO L124 PetriNetUnfolderBase]: 3876/6208 cut-off events. [2024-06-28 03:08:17,071 INFO L125 PetriNetUnfolderBase]: For 89627/89684 co-relation queries the response was YES. [2024-06-28 03:08:17,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35314 conditions, 6208 events. 3876/6208 cut-off events. For 89627/89684 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 38923 event pairs, 1069 based on Foata normal form. 78/6254 useless extension candidates. Maximal degree in co-relation 35258. Up to 3561 conditions per place. [2024-06-28 03:08:17,108 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 122 selfloop transitions, 118 changer transitions 0/247 dead transitions. [2024-06-28 03:08:17,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 247 transitions, 3538 flow [2024-06-28 03:08:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 03:08:17,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-28 03:08:17,110 INFO L175 Difference]: Start difference. First operand has 119 places, 179 transitions, 2371 flow. Second operand 8 states and 174 transitions. [2024-06-28 03:08:17,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 247 transitions, 3538 flow [2024-06-28 03:08:17,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 247 transitions, 3407 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 03:08:17,199 INFO L231 Difference]: Finished difference. Result has 125 places, 196 transitions, 2840 flow [2024-06-28 03:08:17,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2840, PETRI_PLACES=125, PETRI_TRANSITIONS=196} [2024-06-28 03:08:17,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-28 03:08:17,199 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 196 transitions, 2840 flow [2024-06-28 03:08:17,199 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) [2024-06-28 03:08:17,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:17,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:17,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:08:17,200 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)] === [2024-06-28 03:08:17,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:17,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1408602938, now seen corresponding path program 6 times [2024-06-28 03:08:17,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:17,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992260368] [2024-06-28 03:08:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:17,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:17,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:17,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992260368] [2024-06-28 03:08:17,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992260368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:17,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:17,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:17,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480496695] [2024-06-28 03:08:17,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:17,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:17,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:17,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 196 transitions, 2840 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) [2024-06-28 03:08:17,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:17,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:17,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:18,817 INFO L124 PetriNetUnfolderBase]: 3938/6344 cut-off events. [2024-06-28 03:08:18,817 INFO L125 PetriNetUnfolderBase]: For 101252/101321 co-relation queries the response was YES. [2024-06-28 03:08:18,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37597 conditions, 6344 events. 3938/6344 cut-off events. For 101252/101321 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 40084 event pairs, 1198 based on Foata normal form. 96/6425 useless extension candidates. Maximal degree in co-relation 37538. Up to 4694 conditions per place. [2024-06-28 03:08:18,867 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 112 changer transitions 0/242 dead transitions. [2024-06-28 03:08:18,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 242 transitions, 3713 flow [2024-06-28 03:08:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 03:08:18,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-28 03:08:18,868 INFO L175 Difference]: Start difference. First operand has 125 places, 196 transitions, 2840 flow. Second operand 8 states and 171 transitions. [2024-06-28 03:08:18,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 242 transitions, 3713 flow [2024-06-28 03:08:18,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 242 transitions, 3647 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 03:08:18,986 INFO L231 Difference]: Finished difference. Result has 130 places, 198 transitions, 3087 flow [2024-06-28 03:08:18,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3087, PETRI_PLACES=130, PETRI_TRANSITIONS=198} [2024-06-28 03:08:18,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-28 03:08:18,987 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 198 transitions, 3087 flow [2024-06-28 03:08:18,987 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) [2024-06-28 03:08:18,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:18,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:18,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:08:18,987 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)] === [2024-06-28 03:08:18,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:18,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2109785032, now seen corresponding path program 1 times [2024-06-28 03:08:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:18,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616084802] [2024-06-28 03:08:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:19,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:19,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616084802] [2024-06-28 03:08:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616084802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:19,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:19,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:08:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46258472] [2024-06-28 03:08:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:19,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:08:19,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:08:19,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:08:19,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:19,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 198 transitions, 3087 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:19,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:19,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:19,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:20,424 INFO L124 PetriNetUnfolderBase]: 4516/7088 cut-off events. [2024-06-28 03:08:20,424 INFO L125 PetriNetUnfolderBase]: For 104659/104659 co-relation queries the response was YES. [2024-06-28 03:08:20,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42271 conditions, 7088 events. 4516/7088 cut-off events. For 104659/104659 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 42716 event pairs, 2198 based on Foata normal form. 1/7088 useless extension candidates. Maximal degree in co-relation 42211. Up to 6911 conditions per place. [2024-06-28 03:08:20,473 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 23 changer transitions 0/225 dead transitions. [2024-06-28 03:08:20,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 225 transitions, 3717 flow [2024-06-28 03:08:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:08:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:08:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:08:20,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 03:08:20,475 INFO L175 Difference]: Start difference. First operand has 130 places, 198 transitions, 3087 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:08:20,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 225 transitions, 3717 flow [2024-06-28 03:08:20,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 225 transitions, 3485 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:20,604 INFO L231 Difference]: Finished difference. Result has 132 places, 207 transitions, 3016 flow [2024-06-28 03:08:20,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3016, PETRI_PLACES=132, PETRI_TRANSITIONS=207} [2024-06-28 03:08:20,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-28 03:08:20,605 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 207 transitions, 3016 flow [2024-06-28 03:08:20,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:20,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:20,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:20,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:08:20,605 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:20,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:20,605 INFO L85 PathProgramCache]: Analyzing trace with hash -8827330, now seen corresponding path program 7 times [2024-06-28 03:08:20,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:20,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012075240] [2024-06-28 03:08:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:20,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012075240] [2024-06-28 03:08:21,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012075240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:21,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:21,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:21,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727442997] [2024-06-28 03:08:21,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:21,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:21,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:21,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:21,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:21,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 207 transitions, 3016 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) [2024-06-28 03:08:21,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:21,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:21,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:22,539 INFO L124 PetriNetUnfolderBase]: 4185/6740 cut-off events. [2024-06-28 03:08:22,539 INFO L125 PetriNetUnfolderBase]: For 117355/117421 co-relation queries the response was YES. [2024-06-28 03:08:22,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40869 conditions, 6740 events. 4185/6740 cut-off events. For 117355/117421 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43166 event pairs, 1020 based on Foata normal form. 66/6777 useless extension candidates. Maximal degree in co-relation 40807. Up to 3567 conditions per place. [2024-06-28 03:08:22,587 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 119 selfloop transitions, 133 changer transitions 0/261 dead transitions. [2024-06-28 03:08:22,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 261 transitions, 4008 flow [2024-06-28 03:08:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:22,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 03:08:22,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-28 03:08:22,588 INFO L175 Difference]: Start difference. First operand has 132 places, 207 transitions, 3016 flow. Second operand 9 states and 185 transitions. [2024-06-28 03:08:22,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 261 transitions, 4008 flow [2024-06-28 03:08:22,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 261 transitions, 3975 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 03:08:22,749 INFO L231 Difference]: Finished difference. Result has 140 places, 212 transitions, 3446 flow [2024-06-28 03:08:22,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3446, PETRI_PLACES=140, PETRI_TRANSITIONS=212} [2024-06-28 03:08:22,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-28 03:08:22,750 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 212 transitions, 3446 flow [2024-06-28 03:08:22,750 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) [2024-06-28 03:08:22,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:22,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:08:22,750 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:22,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash -8766880, now seen corresponding path program 8 times [2024-06-28 03:08:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:22,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300999392] [2024-06-28 03:08:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:22,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:23,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:23,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300999392] [2024-06-28 03:08:23,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300999392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:23,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:23,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:23,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013053641] [2024-06-28 03:08:23,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:23,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:23,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:23,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:23,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 212 transitions, 3446 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) [2024-06-28 03:08:23,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:23,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:23,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:24,864 INFO L124 PetriNetUnfolderBase]: 4398/7071 cut-off events. [2024-06-28 03:08:24,865 INFO L125 PetriNetUnfolderBase]: For 141534/141602 co-relation queries the response was YES. [2024-06-28 03:08:24,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45063 conditions, 7071 events. 4398/7071 cut-off events. For 141534/141602 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 45904 event pairs, 1448 based on Foata normal form. 88/7133 useless extension candidates. Maximal degree in co-relation 44998. Up to 5517 conditions per place. [2024-06-28 03:08:24,911 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 137 selfloop transitions, 118 changer transitions 0/264 dead transitions. [2024-06-28 03:08:24,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 264 transitions, 4403 flow [2024-06-28 03:08:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 03:08:24,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-28 03:08:24,913 INFO L175 Difference]: Start difference. First operand has 140 places, 212 transitions, 3446 flow. Second operand 9 states and 181 transitions. [2024-06-28 03:08:24,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 264 transitions, 4403 flow [2024-06-28 03:08:25,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 264 transitions, 4233 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:25,076 INFO L231 Difference]: Finished difference. Result has 144 places, 221 transitions, 3723 flow [2024-06-28 03:08:25,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3723, PETRI_PLACES=144, PETRI_TRANSITIONS=221} [2024-06-28 03:08:25,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-28 03:08:25,076 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 221 transitions, 3723 flow [2024-06-28 03:08:25,077 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) [2024-06-28 03:08:25,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:25,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:25,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:08:25,077 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:25,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1409957670, now seen corresponding path program 9 times [2024-06-28 03:08:25,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:25,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653872991] [2024-06-28 03:08:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:25,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:25,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653872991] [2024-06-28 03:08:25,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653872991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:25,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:25,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:25,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824266816] [2024-06-28 03:08:25,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:25,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:25,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:25,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:08:25,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 221 transitions, 3723 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) [2024-06-28 03:08:25,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:25,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:08:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:26,985 INFO L124 PetriNetUnfolderBase]: 4291/6935 cut-off events. [2024-06-28 03:08:26,985 INFO L125 PetriNetUnfolderBase]: For 124538/124571 co-relation queries the response was YES. [2024-06-28 03:08:27,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43336 conditions, 6935 events. 4291/6935 cut-off events. For 124538/124571 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 45144 event pairs, 1558 based on Foata normal form. 68/6977 useless extension candidates. Maximal degree in co-relation 43270. Up to 5670 conditions per place. [2024-06-28 03:08:27,043 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 96 changer transitions 0/265 dead transitions. [2024-06-28 03:08:27,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 265 transitions, 4525 flow [2024-06-28 03:08:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:08:27,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-28 03:08:27,044 INFO L175 Difference]: Start difference. First operand has 144 places, 221 transitions, 3723 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:08:27,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 265 transitions, 4525 flow [2024-06-28 03:08:27,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 265 transitions, 4302 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:27,273 INFO L231 Difference]: Finished difference. Result has 148 places, 221 transitions, 3710 flow [2024-06-28 03:08:27,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3710, PETRI_PLACES=148, PETRI_TRANSITIONS=221} [2024-06-28 03:08:27,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-28 03:08:27,274 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 221 transitions, 3710 flow [2024-06-28 03:08:27,274 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) [2024-06-28 03:08:27,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:27,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:27,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:08:27,275 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:27,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:27,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1294481802, now seen corresponding path program 1 times [2024-06-28 03:08:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:27,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739070940] [2024-06-28 03:08:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:28,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739070940] [2024-06-28 03:08:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739070940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:28,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898292918] [2024-06-28 03:08:28,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:28,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:28,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:28,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:28,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:28,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:28,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 221 transitions, 3710 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:28,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:28,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:28,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:29,434 INFO L124 PetriNetUnfolderBase]: 4899/7786 cut-off events. [2024-06-28 03:08:29,435 INFO L125 PetriNetUnfolderBase]: For 129930/129977 co-relation queries the response was YES. [2024-06-28 03:08:29,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48227 conditions, 7786 events. 4899/7786 cut-off events. For 129930/129977 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49483 event pairs, 1813 based on Foata normal form. 42/7795 useless extension candidates. Maximal degree in co-relation 48160. Up to 6960 conditions per place. [2024-06-28 03:08:29,487 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 180 selfloop transitions, 86 changer transitions 0/273 dead transitions. [2024-06-28 03:08:29,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 273 transitions, 4762 flow [2024-06-28 03:08:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:08:29,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:08:29,488 INFO L175 Difference]: Start difference. First operand has 148 places, 221 transitions, 3710 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:08:29,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 273 transitions, 4762 flow [2024-06-28 03:08:29,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 273 transitions, 4435 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 03:08:29,689 INFO L231 Difference]: Finished difference. Result has 148 places, 240 transitions, 3963 flow [2024-06-28 03:08:29,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3963, PETRI_PLACES=148, PETRI_TRANSITIONS=240} [2024-06-28 03:08:29,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-28 03:08:29,690 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 240 transitions, 3963 flow [2024-06-28 03:08:29,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:29,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:29,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:29,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:08:29,690 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:29,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1504644354, now seen corresponding path program 2 times [2024-06-28 03:08:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:29,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924136938] [2024-06-28 03:08:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:30,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:30,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924136938] [2024-06-28 03:08:30,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924136938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:30,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:30,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:08:30,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102867177] [2024-06-28 03:08:30,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:30,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:08:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:08:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:08:30,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:30,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 240 transitions, 3963 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:30,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:30,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:30,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:31,208 INFO L124 PetriNetUnfolderBase]: 5002/7907 cut-off events. [2024-06-28 03:08:31,209 INFO L125 PetriNetUnfolderBase]: For 123779/123779 co-relation queries the response was YES. [2024-06-28 03:08:31,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49104 conditions, 7907 events. 5002/7907 cut-off events. For 123779/123779 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 49560 event pairs, 2264 based on Foata normal form. 1/7907 useless extension candidates. Maximal degree in co-relation 49035. Up to 7708 conditions per place. [2024-06-28 03:08:31,271 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 229 selfloop transitions, 25 changer transitions 0/257 dead transitions. [2024-06-28 03:08:31,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 257 transitions, 4600 flow [2024-06-28 03:08:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:08:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:08:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-28 03:08:31,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 03:08:31,272 INFO L175 Difference]: Start difference. First operand has 148 places, 240 transitions, 3963 flow. Second operand 6 states and 104 transitions. [2024-06-28 03:08:31,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 257 transitions, 4600 flow [2024-06-28 03:08:31,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 257 transitions, 4387 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:31,477 INFO L231 Difference]: Finished difference. Result has 149 places, 243 transitions, 3850 flow [2024-06-28 03:08:31,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3850, PETRI_PLACES=149, PETRI_TRANSITIONS=243} [2024-06-28 03:08:31,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-28 03:08:31,478 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 243 transitions, 3850 flow [2024-06-28 03:08:31,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:31,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:31,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:31,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:08:31,478 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:31,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:31,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1270058766, now seen corresponding path program 2 times [2024-06-28 03:08:31,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:31,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008879510] [2024-06-28 03:08:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008879510] [2024-06-28 03:08:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008879510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:32,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:32,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:32,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537635200] [2024-06-28 03:08:32,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:32,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:32,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:32,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 243 transitions, 3850 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:32,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:32,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:32,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:33,726 INFO L124 PetriNetUnfolderBase]: 4980/7905 cut-off events. [2024-06-28 03:08:33,726 INFO L125 PetriNetUnfolderBase]: For 131073/131090 co-relation queries the response was YES. [2024-06-28 03:08:33,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48824 conditions, 7905 events. 4980/7905 cut-off events. For 131073/131090 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50151 event pairs, 2329 based on Foata normal form. 8/7873 useless extension candidates. Maximal degree in co-relation 48755. Up to 7588 conditions per place. [2024-06-28 03:08:33,794 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 24 changer transitions 0/273 dead transitions. [2024-06-28 03:08:33,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 273 transitions, 4599 flow [2024-06-28 03:08:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:08:33,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 03:08:33,795 INFO L175 Difference]: Start difference. First operand has 149 places, 243 transitions, 3850 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:08:33,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 273 transitions, 4599 flow [2024-06-28 03:08:34,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 273 transitions, 4543 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 03:08:34,025 INFO L231 Difference]: Finished difference. Result has 153 places, 247 transitions, 3963 flow [2024-06-28 03:08:34,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3963, PETRI_PLACES=153, PETRI_TRANSITIONS=247} [2024-06-28 03:08:34,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-28 03:08:34,026 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 247 transitions, 3963 flow [2024-06-28 03:08:34,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:34,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:34,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:34,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:08:34,026 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:34,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:34,027 INFO L85 PathProgramCache]: Analyzing trace with hash -394655264, now seen corresponding path program 1 times [2024-06-28 03:08:34,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:34,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779564070] [2024-06-28 03:08:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:34,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:34,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779564070] [2024-06-28 03:08:34,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779564070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:34,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:34,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:34,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373748017] [2024-06-28 03:08:34,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:34,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:34,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 247 transitions, 3963 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:34,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:34,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:34,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:35,650 INFO L124 PetriNetUnfolderBase]: 5072/8012 cut-off events. [2024-06-28 03:08:35,651 INFO L125 PetriNetUnfolderBase]: For 126072/126072 co-relation queries the response was YES. [2024-06-28 03:08:35,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49266 conditions, 8012 events. 5072/8012 cut-off events. For 126072/126072 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50305 event pairs, 2274 based on Foata normal form. 3/8014 useless extension candidates. Maximal degree in co-relation 49197. Up to 7781 conditions per place. [2024-06-28 03:08:35,721 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 32 changer transitions 0/275 dead transitions. [2024-06-28 03:08:35,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 275 transitions, 4691 flow [2024-06-28 03:08:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:08:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:08:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 03:08:35,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-28 03:08:35,722 INFO L175 Difference]: Start difference. First operand has 153 places, 247 transitions, 3963 flow. Second operand 7 states and 122 transitions. [2024-06-28 03:08:35,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 275 transitions, 4691 flow [2024-06-28 03:08:35,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 275 transitions, 4573 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:35,963 INFO L231 Difference]: Finished difference. Result has 155 places, 256 transitions, 4019 flow [2024-06-28 03:08:35,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4019, PETRI_PLACES=155, PETRI_TRANSITIONS=256} [2024-06-28 03:08:35,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-28 03:08:35,964 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 256 transitions, 4019 flow [2024-06-28 03:08:35,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:35,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:35,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:08:35,964 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:35,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1229323592, now seen corresponding path program 3 times [2024-06-28 03:08:35,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:35,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313304829] [2024-06-28 03:08:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:36,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:36,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313304829] [2024-06-28 03:08:36,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313304829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:36,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:36,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738335542] [2024-06-28 03:08:36,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:36,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:36,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:36,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:36,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 256 transitions, 4019 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:36,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:36,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:36,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:38,111 INFO L124 PetriNetUnfolderBase]: 5001/7919 cut-off events. [2024-06-28 03:08:38,112 INFO L125 PetriNetUnfolderBase]: For 139574/139590 co-relation queries the response was YES. [2024-06-28 03:08:38,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49860 conditions, 7919 events. 5001/7919 cut-off events. For 139574/139590 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 49844 event pairs, 2281 based on Foata normal form. 4/7883 useless extension candidates. Maximal degree in co-relation 49789. Up to 7632 conditions per place. [2024-06-28 03:08:38,185 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 19 changer transitions 0/282 dead transitions. [2024-06-28 03:08:38,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 282 transitions, 4693 flow [2024-06-28 03:08:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 03:08:38,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-28 03:08:38,187 INFO L175 Difference]: Start difference. First operand has 155 places, 256 transitions, 4019 flow. Second operand 9 states and 150 transitions. [2024-06-28 03:08:38,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 282 transitions, 4693 flow [2024-06-28 03:08:38,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 282 transitions, 4652 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 03:08:38,454 INFO L231 Difference]: Finished difference. Result has 162 places, 258 transitions, 4063 flow [2024-06-28 03:08:38,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4063, PETRI_PLACES=162, PETRI_TRANSITIONS=258} [2024-06-28 03:08:38,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-28 03:08:38,455 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 258 transitions, 4063 flow [2024-06-28 03:08:38,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:38,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:38,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:38,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:08:38,455 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:38,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1255736920, now seen corresponding path program 4 times [2024-06-28 03:08:38,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:38,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674655083] [2024-06-28 03:08:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:39,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:39,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674655083] [2024-06-28 03:08:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674655083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:39,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:39,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777529631] [2024-06-28 03:08:39,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:39,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:39,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:39,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:39,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 258 transitions, 4063 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:39,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:39,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:39,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:40,555 INFO L124 PetriNetUnfolderBase]: 5040/7998 cut-off events. [2024-06-28 03:08:40,556 INFO L125 PetriNetUnfolderBase]: For 149561/149577 co-relation queries the response was YES. [2024-06-28 03:08:40,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50840 conditions, 7998 events. 5040/7998 cut-off events. For 149561/149577 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 50853 event pairs, 2326 based on Foata normal form. 8/7966 useless extension candidates. Maximal degree in co-relation 50766. Up to 7637 conditions per place. [2024-06-28 03:08:40,627 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-28 03:08:40,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 295 transitions, 4962 flow [2024-06-28 03:08:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:08:40,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-28 03:08:40,628 INFO L175 Difference]: Start difference. First operand has 162 places, 258 transitions, 4063 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:08:40,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 295 transitions, 4962 flow [2024-06-28 03:08:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 295 transitions, 4886 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 03:08:40,907 INFO L231 Difference]: Finished difference. Result has 163 places, 266 transitions, 4271 flow [2024-06-28 03:08:40,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3987, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4271, PETRI_PLACES=163, PETRI_TRANSITIONS=266} [2024-06-28 03:08:40,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-28 03:08:40,908 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 266 transitions, 4271 flow [2024-06-28 03:08:40,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:40,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:40,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:08:40,908 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:40,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1229620262, now seen corresponding path program 5 times [2024-06-28 03:08:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451146410] [2024-06-28 03:08:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:41,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:41,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451146410] [2024-06-28 03:08:41,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451146410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:41,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:41,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:41,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991288799] [2024-06-28 03:08:41,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:41,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:41,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:41,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:41,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 266 transitions, 4271 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:41,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:41,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:41,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:43,091 INFO L124 PetriNetUnfolderBase]: 5022/7971 cut-off events. [2024-06-28 03:08:43,092 INFO L125 PetriNetUnfolderBase]: For 158440/158456 co-relation queries the response was YES. [2024-06-28 03:08:43,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51415 conditions, 7971 events. 5022/7971 cut-off events. For 158440/158456 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 50588 event pairs, 2321 based on Foata normal form. 8/7939 useless extension candidates. Maximal degree in co-relation 51340. Up to 7597 conditions per place. [2024-06-28 03:08:43,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 35 changer transitions 0/297 dead transitions. [2024-06-28 03:08:43,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 297 transitions, 5097 flow [2024-06-28 03:08:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:08:43,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 03:08:43,168 INFO L175 Difference]: Start difference. First operand has 163 places, 266 transitions, 4271 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:08:43,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 297 transitions, 5097 flow [2024-06-28 03:08:43,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 297 transitions, 4926 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:43,431 INFO L231 Difference]: Finished difference. Result has 166 places, 270 transitions, 4317 flow [2024-06-28 03:08:43,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4317, PETRI_PLACES=166, PETRI_TRANSITIONS=270} [2024-06-28 03:08:43,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-28 03:08:43,432 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 270 transitions, 4317 flow [2024-06-28 03:08:43,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:43,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:43,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:43,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:08:43,432 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:43,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1506291662, now seen corresponding path program 1 times [2024-06-28 03:08:43,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:43,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677528542] [2024-06-28 03:08:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:43,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:44,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:44,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677528542] [2024-06-28 03:08:44,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677528542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:44,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:44,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:08:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356049030] [2024-06-28 03:08:44,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:08:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:08:44,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:08:44,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:44,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 270 transitions, 4317 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:44,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:44,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:44,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:45,366 INFO L124 PetriNetUnfolderBase]: 4954/7858 cut-off events. [2024-06-28 03:08:45,366 INFO L125 PetriNetUnfolderBase]: For 159982/160006 co-relation queries the response was YES. [2024-06-28 03:08:45,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50826 conditions, 7858 events. 4954/7858 cut-off events. For 159982/160006 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 49736 event pairs, 1847 based on Foata normal form. 9/7840 useless extension candidates. Maximal degree in co-relation 50750. Up to 7127 conditions per place. [2024-06-28 03:08:45,437 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 196 selfloop transitions, 93 changer transitions 0/297 dead transitions. [2024-06-28 03:08:45,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 297 transitions, 5041 flow [2024-06-28 03:08:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:08:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:08:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-28 03:08:45,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:08:45,440 INFO L175 Difference]: Start difference. First operand has 166 places, 270 transitions, 4317 flow. Second operand 6 states and 123 transitions. [2024-06-28 03:08:45,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 297 transitions, 5041 flow [2024-06-28 03:08:45,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 297 transitions, 4886 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:45,761 INFO L231 Difference]: Finished difference. Result has 166 places, 270 transitions, 4386 flow [2024-06-28 03:08:45,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4162, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4386, PETRI_PLACES=166, PETRI_TRANSITIONS=270} [2024-06-28 03:08:45,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-28 03:08:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 270 transitions, 4386 flow [2024-06-28 03:08:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:45,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:45,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:45,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:08:45,762 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:45,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1386776354, now seen corresponding path program 3 times [2024-06-28 03:08:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:45,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59003142] [2024-06-28 03:08:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:45,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:46,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:46,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59003142] [2024-06-28 03:08:46,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59003142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:46,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:46,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:46,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512792402] [2024-06-28 03:08:46,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:46,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:46,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:46,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:46,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 270 transitions, 4386 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:46,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:46,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:46,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:47,396 INFO L124 PetriNetUnfolderBase]: 5047/7968 cut-off events. [2024-06-28 03:08:47,396 INFO L125 PetriNetUnfolderBase]: For 159826/159826 co-relation queries the response was YES. [2024-06-28 03:08:47,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51208 conditions, 7968 events. 5047/7968 cut-off events. For 159826/159826 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49886 event pairs, 2407 based on Foata normal form. 1/7968 useless extension candidates. Maximal degree in co-relation 51131. Up to 7797 conditions per place. [2024-06-28 03:08:47,472 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 262 selfloop transitions, 13 changer transitions 0/278 dead transitions. [2024-06-28 03:08:47,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 278 transitions, 4962 flow [2024-06-28 03:08:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:08:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:08:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-28 03:08:47,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-28 03:08:47,473 INFO L175 Difference]: Start difference. First operand has 166 places, 270 transitions, 4386 flow. Second operand 7 states and 104 transitions. [2024-06-28 03:08:47,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 278 transitions, 4962 flow [2024-06-28 03:08:47,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 278 transitions, 4760 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 03:08:47,766 INFO L231 Difference]: Finished difference. Result has 168 places, 270 transitions, 4216 flow [2024-06-28 03:08:47,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4216, PETRI_PLACES=168, PETRI_TRANSITIONS=270} [2024-06-28 03:08:47,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-28 03:08:47,767 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 270 transitions, 4216 flow [2024-06-28 03:08:47,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:47,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:47,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:47,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:08:47,767 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)] === [2024-06-28 03:08:47,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:47,767 INFO L85 PathProgramCache]: Analyzing trace with hash -906151052, now seen corresponding path program 1 times [2024-06-28 03:08:47,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:47,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839628307] [2024-06-28 03:08:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:47,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839628307] [2024-06-28 03:08:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839628307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:48,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:08:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325720581] [2024-06-28 03:08:48,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:48,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:08:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:08:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:08:48,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:48,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 270 transitions, 4216 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:48,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:48,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:48,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:49,458 INFO L124 PetriNetUnfolderBase]: 5052/7975 cut-off events. [2024-06-28 03:08:49,458 INFO L125 PetriNetUnfolderBase]: For 163677/163677 co-relation queries the response was YES. [2024-06-28 03:08:49,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51019 conditions, 7975 events. 5052/7975 cut-off events. For 163677/163677 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49838 event pairs, 2423 based on Foata normal form. 1/7975 useless extension candidates. Maximal degree in co-relation 50941. Up to 7791 conditions per place. [2024-06-28 03:08:49,528 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 268 selfloop transitions, 17 changer transitions 0/288 dead transitions. [2024-06-28 03:08:49,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 288 transitions, 4940 flow [2024-06-28 03:08:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:08:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:08:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:08:49,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-28 03:08:49,529 INFO L175 Difference]: Start difference. First operand has 168 places, 270 transitions, 4216 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:08:49,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 288 transitions, 4940 flow [2024-06-28 03:08:49,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 288 transitions, 4898 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:49,801 INFO L231 Difference]: Finished difference. Result has 168 places, 276 transitions, 4276 flow [2024-06-28 03:08:49,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4276, PETRI_PLACES=168, PETRI_TRANSITIONS=276} [2024-06-28 03:08:49,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-28 03:08:49,801 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 276 transitions, 4276 flow [2024-06-28 03:08:49,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:49,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:49,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:49,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:08:49,802 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:49,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash 219961450, now seen corresponding path program 2 times [2024-06-28 03:08:49,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:49,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638802985] [2024-06-28 03:08:49,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:49,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:50,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:50,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638802985] [2024-06-28 03:08:50,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638802985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:50,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:50,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:08:50,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324365855] [2024-06-28 03:08:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:50,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:08:50,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:50,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:08:50,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:08:50,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:50,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 276 transitions, 4276 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:50,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:50,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:50,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:51,505 INFO L124 PetriNetUnfolderBase]: 5049/7972 cut-off events. [2024-06-28 03:08:51,505 INFO L125 PetriNetUnfolderBase]: For 172420/172423 co-relation queries the response was YES. [2024-06-28 03:08:51,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51796 conditions, 7972 events. 5049/7972 cut-off events. For 172420/172423 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49814 event pairs, 2426 based on Foata normal form. 3/7973 useless extension candidates. Maximal degree in co-relation 51717. Up to 7788 conditions per place. [2024-06-28 03:08:51,570 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 264 selfloop transitions, 17 changer transitions 0/284 dead transitions. [2024-06-28 03:08:51,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 284 transitions, 4864 flow [2024-06-28 03:08:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:08:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:08:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 03:08:51,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-28 03:08:51,571 INFO L175 Difference]: Start difference. First operand has 168 places, 276 transitions, 4276 flow. Second operand 6 states and 97 transitions. [2024-06-28 03:08:51,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 284 transitions, 4864 flow [2024-06-28 03:08:51,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 284 transitions, 4815 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-28 03:08:51,852 INFO L231 Difference]: Finished difference. Result has 172 places, 276 transitions, 4267 flow [2024-06-28 03:08:51,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4267, PETRI_PLACES=172, PETRI_TRANSITIONS=276} [2024-06-28 03:08:51,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-28 03:08:51,853 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 276 transitions, 4267 flow [2024-06-28 03:08:51,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:51,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:51,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:08:51,854 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:51,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash 772834978, now seen corresponding path program 1 times [2024-06-28 03:08:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:51,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448206161] [2024-06-28 03:08:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:52,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:52,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448206161] [2024-06-28 03:08:52,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448206161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:52,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:52,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:08:52,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114873276] [2024-06-28 03:08:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:52,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:08:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:08:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:08:52,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:08:52,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 276 transitions, 4267 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:52,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:52,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:08:52,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:53,562 INFO L124 PetriNetUnfolderBase]: 5100/8031 cut-off events. [2024-06-28 03:08:53,562 INFO L125 PetriNetUnfolderBase]: For 179347/179370 co-relation queries the response was YES. [2024-06-28 03:08:53,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52301 conditions, 8031 events. 5100/8031 cut-off events. For 179347/179370 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 50036 event pairs, 2024 based on Foata normal form. 20/8049 useless extension candidates. Maximal degree in co-relation 52220. Up to 7609 conditions per place. [2024-06-28 03:08:53,625 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 265 selfloop transitions, 61 changer transitions 0/329 dead transitions. [2024-06-28 03:08:53,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 329 transitions, 5545 flow [2024-06-28 03:08:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:08:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:08:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:08:53,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 03:08:53,626 INFO L175 Difference]: Start difference. First operand has 172 places, 276 transitions, 4267 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:08:53,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 329 transitions, 5545 flow [2024-06-28 03:08:53,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 329 transitions, 5497 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:08:53,957 INFO L231 Difference]: Finished difference. Result has 177 places, 300 transitions, 4787 flow [2024-06-28 03:08:53,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4219, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4787, PETRI_PLACES=177, PETRI_TRANSITIONS=300} [2024-06-28 03:08:53,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-28 03:08:53,958 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 300 transitions, 4787 flow [2024-06-28 03:08:53,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:53,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:53,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:53,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:08:53,958 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)] === [2024-06-28 03:08:53,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:53,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1389895494, now seen corresponding path program 1 times [2024-06-28 03:08:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:53,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235775440] [2024-06-28 03:08:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:53,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:54,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:54,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235775440] [2024-06-28 03:08:54,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235775440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:54,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:54,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:54,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903860643] [2024-06-28 03:08:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:54,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:54,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:54,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:54,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:54,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:54,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 300 transitions, 4787 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:54,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:54,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:54,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:56,363 INFO L124 PetriNetUnfolderBase]: 5132/8112 cut-off events. [2024-06-28 03:08:56,363 INFO L125 PetriNetUnfolderBase]: For 205432/205463 co-relation queries the response was YES. [2024-06-28 03:08:56,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55444 conditions, 8112 events. 5132/8112 cut-off events. For 205432/205463 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 51042 event pairs, 1913 based on Foata normal form. 20/8104 useless extension candidates. Maximal degree in co-relation 55360. Up to 7314 conditions per place. [2024-06-28 03:08:56,441 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 237 selfloop transitions, 114 changer transitions 0/364 dead transitions. [2024-06-28 03:08:56,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 364 transitions, 6210 flow [2024-06-28 03:08:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:08:56,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-28 03:08:56,442 INFO L175 Difference]: Start difference. First operand has 177 places, 300 transitions, 4787 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:08:56,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 364 transitions, 6210 flow [2024-06-28 03:08:56,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 364 transitions, 6107 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-28 03:08:56,842 INFO L231 Difference]: Finished difference. Result has 187 places, 328 transitions, 5627 flow [2024-06-28 03:08:56,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5627, PETRI_PLACES=187, PETRI_TRANSITIONS=328} [2024-06-28 03:08:56,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-28 03:08:56,843 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 328 transitions, 5627 flow [2024-06-28 03:08:56,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:56,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:56,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:56,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:08:56,844 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)] === [2024-06-28 03:08:56,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1395459684, now seen corresponding path program 2 times [2024-06-28 03:08:56,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:56,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786206115] [2024-06-28 03:08:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:56,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:08:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:08:57,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:08:57,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786206115] [2024-06-28 03:08:57,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786206115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:08:57,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:08:57,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:08:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693282180] [2024-06-28 03:08:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:08:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:08:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:08:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:08:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:08:57,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:08:57,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 328 transitions, 5627 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:57,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:08:57,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:08:57,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:08:59,233 INFO L124 PetriNetUnfolderBase]: 5232/8262 cut-off events. [2024-06-28 03:08:59,233 INFO L125 PetriNetUnfolderBase]: For 220363/220394 co-relation queries the response was YES. [2024-06-28 03:08:59,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58052 conditions, 8262 events. 5232/8262 cut-off events. For 220363/220394 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 52072 event pairs, 1900 based on Foata normal form. 20/8254 useless extension candidates. Maximal degree in co-relation 57963. Up to 7412 conditions per place. [2024-06-28 03:08:59,322 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 247 selfloop transitions, 120 changer transitions 0/380 dead transitions. [2024-06-28 03:08:59,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 380 transitions, 6943 flow [2024-06-28 03:08:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:08:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:08:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:08:59,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-28 03:08:59,323 INFO L175 Difference]: Start difference. First operand has 187 places, 328 transitions, 5627 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:08:59,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 380 transitions, 6943 flow [2024-06-28 03:08:59,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 380 transitions, 6768 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 03:08:59,785 INFO L231 Difference]: Finished difference. Result has 195 places, 347 transitions, 6242 flow [2024-06-28 03:08:59,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5464, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6242, PETRI_PLACES=195, PETRI_TRANSITIONS=347} [2024-06-28 03:08:59,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-28 03:08:59,786 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 347 transitions, 6242 flow [2024-06-28 03:08:59,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:08:59,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:08:59,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:08:59,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:08:59,787 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:08:59,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:08:59,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1395467124, now seen corresponding path program 3 times [2024-06-28 03:08:59,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:08:59,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287504731] [2024-06-28 03:08:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:08:59,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:08:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:00,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:00,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287504731] [2024-06-28 03:09:00,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287504731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:00,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:00,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:00,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117272416] [2024-06-28 03:09:00,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:00,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:00,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:00,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:00,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:00,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:00,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 347 transitions, 6242 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:00,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:02,233 INFO L124 PetriNetUnfolderBase]: 5292/8352 cut-off events. [2024-06-28 03:09:02,233 INFO L125 PetriNetUnfolderBase]: For 235343/235374 co-relation queries the response was YES. [2024-06-28 03:09:02,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59482 conditions, 8352 events. 5292/8352 cut-off events. For 235343/235374 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52783 event pairs, 1878 based on Foata normal form. 20/8334 useless extension candidates. Maximal degree in co-relation 59390. Up to 7329 conditions per place. [2024-06-28 03:09:02,319 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 246 selfloop transitions, 132 changer transitions 0/391 dead transitions. [2024-06-28 03:09:02,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 391 transitions, 7381 flow [2024-06-28 03:09:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:09:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:09:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:09:02,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-28 03:09:02,320 INFO L175 Difference]: Start difference. First operand has 195 places, 347 transitions, 6242 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:09:02,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 391 transitions, 7381 flow [2024-06-28 03:09:02,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 391 transitions, 7164 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:02,793 INFO L231 Difference]: Finished difference. Result has 201 places, 357 transitions, 6522 flow [2024-06-28 03:09:02,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6522, PETRI_PLACES=201, PETRI_TRANSITIONS=357} [2024-06-28 03:09:02,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-28 03:09:02,794 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 357 transitions, 6522 flow [2024-06-28 03:09:02,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:02,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:02,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:02,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:09:02,794 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:02,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1471568894, now seen corresponding path program 2 times [2024-06-28 03:09:02,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:02,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250490286] [2024-06-28 03:09:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:02,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:03,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:03,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250490286] [2024-06-28 03:09:03,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250490286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:03,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:03,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:09:03,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953140376] [2024-06-28 03:09:03,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:03,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:09:03,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:03,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:09:03,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:09:03,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:03,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 357 transitions, 6522 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:03,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:03,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:03,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:04,890 INFO L124 PetriNetUnfolderBase]: 5394/8473 cut-off events. [2024-06-28 03:09:04,890 INFO L125 PetriNetUnfolderBase]: For 235819/235836 co-relation queries the response was YES. [2024-06-28 03:09:04,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60389 conditions, 8473 events. 5394/8473 cut-off events. For 235819/235836 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52999 event pairs, 2077 based on Foata normal form. 16/8487 useless extension candidates. Maximal degree in co-relation 60295. Up to 8012 conditions per place. [2024-06-28 03:09:04,987 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 320 selfloop transitions, 77 changer transitions 0/400 dead transitions. [2024-06-28 03:09:04,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 400 transitions, 7842 flow [2024-06-28 03:09:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:09:04,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-28 03:09:04,988 INFO L175 Difference]: Start difference. First operand has 201 places, 357 transitions, 6522 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:09:04,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 400 transitions, 7842 flow [2024-06-28 03:09:05,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 400 transitions, 7680 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:05,502 INFO L231 Difference]: Finished difference. Result has 208 places, 375 transitions, 6832 flow [2024-06-28 03:09:05,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6362, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6832, PETRI_PLACES=208, PETRI_TRANSITIONS=375} [2024-06-28 03:09:05,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-28 03:09:05,503 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 375 transitions, 6832 flow [2024-06-28 03:09:05,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:05,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:05,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:05,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:09:05,503 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash 304344394, now seen corresponding path program 3 times [2024-06-28 03:09:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:05,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606128323] [2024-06-28 03:09:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:06,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:06,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606128323] [2024-06-28 03:09:06,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606128323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:06,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:06,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:09:06,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23597901] [2024-06-28 03:09:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:09:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:09:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:09:06,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:06,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 375 transitions, 6832 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:06,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:06,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:06,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:07,619 INFO L124 PetriNetUnfolderBase]: 5390/8472 cut-off events. [2024-06-28 03:09:07,620 INFO L125 PetriNetUnfolderBase]: For 243916/243935 co-relation queries the response was YES. [2024-06-28 03:09:07,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60850 conditions, 8472 events. 5390/8472 cut-off events. For 243916/243935 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 53000 event pairs, 2083 based on Foata normal form. 16/8486 useless extension candidates. Maximal degree in co-relation 60751. Up to 8010 conditions per place. [2024-06-28 03:09:07,715 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 318 selfloop transitions, 75 changer transitions 0/396 dead transitions. [2024-06-28 03:09:07,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 396 transitions, 7852 flow [2024-06-28 03:09:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:09:07,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 03:09:07,716 INFO L175 Difference]: Start difference. First operand has 208 places, 375 transitions, 6832 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:09:07,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 396 transitions, 7852 flow [2024-06-28 03:09:08,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 396 transitions, 7740 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 03:09:08,209 INFO L231 Difference]: Finished difference. Result has 213 places, 375 transitions, 6878 flow [2024-06-28 03:09:08,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6720, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6878, PETRI_PLACES=213, PETRI_TRANSITIONS=375} [2024-06-28 03:09:08,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-28 03:09:08,210 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 375 transitions, 6878 flow [2024-06-28 03:09:08,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:08,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:08,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:08,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:09:08,210 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:08,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash -321524408, now seen corresponding path program 4 times [2024-06-28 03:09:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:08,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387445289] [2024-06-28 03:09:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:08,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:08,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387445289] [2024-06-28 03:09:08,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387445289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:08,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:08,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:08,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272050599] [2024-06-28 03:09:08,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:08,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:08,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:08,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:08,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 375 transitions, 6878 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:08,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:08,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:08,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:10,103 INFO L124 PetriNetUnfolderBase]: 5400/8483 cut-off events. [2024-06-28 03:09:10,103 INFO L125 PetriNetUnfolderBase]: For 253173/253192 co-relation queries the response was YES. [2024-06-28 03:09:10,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61210 conditions, 8483 events. 5400/8483 cut-off events. For 253173/253192 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53078 event pairs, 2069 based on Foata normal form. 18/8499 useless extension candidates. Maximal degree in co-relation 61110. Up to 8020 conditions per place. [2024-06-28 03:09:10,197 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 308 selfloop transitions, 90 changer transitions 0/401 dead transitions. [2024-06-28 03:09:10,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 401 transitions, 7979 flow [2024-06-28 03:09:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 03:09:10,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-28 03:09:10,198 INFO L175 Difference]: Start difference. First operand has 213 places, 375 transitions, 6878 flow. Second operand 7 states and 129 transitions. [2024-06-28 03:09:10,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 401 transitions, 7979 flow [2024-06-28 03:09:10,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 401 transitions, 7812 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 03:09:10,732 INFO L231 Difference]: Finished difference. Result has 216 places, 380 transitions, 7043 flow [2024-06-28 03:09:10,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6717, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7043, PETRI_PLACES=216, PETRI_TRANSITIONS=380} [2024-06-28 03:09:10,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-28 03:09:10,733 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 380 transitions, 7043 flow [2024-06-28 03:09:10,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:10,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:10,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:10,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:09:10,734 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:10,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash -732562054, now seen corresponding path program 4 times [2024-06-28 03:09:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:10,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627646362] [2024-06-28 03:09:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:11,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:11,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627646362] [2024-06-28 03:09:11,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627646362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:11,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:11,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:11,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578620444] [2024-06-28 03:09:11,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:11,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:11,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 380 transitions, 7043 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:11,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:11,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:11,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:13,238 INFO L124 PetriNetUnfolderBase]: 5487/8654 cut-off events. [2024-06-28 03:09:13,238 INFO L125 PetriNetUnfolderBase]: For 287257/287286 co-relation queries the response was YES. [2024-06-28 03:09:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64265 conditions, 8654 events. 5487/8654 cut-off events. For 287257/287286 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 54922 event pairs, 1947 based on Foata normal form. 22/8648 useless extension candidates. Maximal degree in co-relation 64164. Up to 7667 conditions per place. [2024-06-28 03:09:13,313 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 155 changer transitions 0/447 dead transitions. [2024-06-28 03:09:13,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 447 transitions, 8974 flow [2024-06-28 03:09:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:09:13,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 03:09:13,315 INFO L175 Difference]: Start difference. First operand has 216 places, 380 transitions, 7043 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:09:13,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 447 transitions, 8974 flow [2024-06-28 03:09:13,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 447 transitions, 8821 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 03:09:13,777 INFO L231 Difference]: Finished difference. Result has 220 places, 413 transitions, 8153 flow [2024-06-28 03:09:13,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6891, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8153, PETRI_PLACES=220, PETRI_TRANSITIONS=413} [2024-06-28 03:09:13,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-28 03:09:13,778 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 413 transitions, 8153 flow [2024-06-28 03:09:13,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:13,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:13,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:13,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:09:13,779 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)] === [2024-06-28 03:09:13,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:13,780 INFO L85 PathProgramCache]: Analyzing trace with hash -900295350, now seen corresponding path program 5 times [2024-06-28 03:09:13,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:13,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381514628] [2024-06-28 03:09:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:14,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:14,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381514628] [2024-06-28 03:09:14,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381514628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:14,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:14,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:14,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682948082] [2024-06-28 03:09:14,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:14,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:14,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:14,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:14,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:14,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:14,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 413 transitions, 8153 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:14,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:14,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:14,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:16,462 INFO L124 PetriNetUnfolderBase]: 5592/8813 cut-off events. [2024-06-28 03:09:16,462 INFO L125 PetriNetUnfolderBase]: For 295166/295195 co-relation queries the response was YES. [2024-06-28 03:09:16,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66668 conditions, 8813 events. 5592/8813 cut-off events. For 295166/295195 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 56110 event pairs, 1912 based on Foata normal form. 22/8797 useless extension candidates. Maximal degree in co-relation 66566. Up to 7418 conditions per place. [2024-06-28 03:09:16,556 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 256 selfloop transitions, 180 changer transitions 0/454 dead transitions. [2024-06-28 03:09:16,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 454 transitions, 9590 flow [2024-06-28 03:09:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:09:16,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-28 03:09:16,557 INFO L175 Difference]: Start difference. First operand has 220 places, 413 transitions, 8153 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:09:16,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 454 transitions, 9590 flow [2024-06-28 03:09:17,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 454 transitions, 9336 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-28 03:09:17,132 INFO L231 Difference]: Finished difference. Result has 225 places, 421 transitions, 8559 flow [2024-06-28 03:09:17,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7899, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8559, PETRI_PLACES=225, PETRI_TRANSITIONS=421} [2024-06-28 03:09:17,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-28 03:09:17,133 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 421 transitions, 8559 flow [2024-06-28 03:09:17,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:17,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:17,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:17,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:09:17,133 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)] === [2024-06-28 03:09:17,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1479800320, now seen corresponding path program 6 times [2024-06-28 03:09:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:17,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756279777] [2024-06-28 03:09:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:17,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756279777] [2024-06-28 03:09:17,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756279777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:17,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:17,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411596655] [2024-06-28 03:09:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:17,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:17,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:18,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:18,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 421 transitions, 8559 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:18,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:18,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:18,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:19,630 INFO L124 PetriNetUnfolderBase]: 5561/8763 cut-off events. [2024-06-28 03:09:19,631 INFO L125 PetriNetUnfolderBase]: For 304168/304199 co-relation queries the response was YES. [2024-06-28 03:09:19,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66606 conditions, 8763 events. 5561/8763 cut-off events. For 304168/304199 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 55740 event pairs, 1977 based on Foata normal form. 26/8758 useless extension candidates. Maximal degree in co-relation 66503. Up to 7783 conditions per place. [2024-06-28 03:09:19,730 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 270 selfloop transitions, 169 changer transitions 0/457 dead transitions. [2024-06-28 03:09:19,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 457 transitions, 9653 flow [2024-06-28 03:09:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:09:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:09:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:09:19,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-28 03:09:19,731 INFO L175 Difference]: Start difference. First operand has 225 places, 421 transitions, 8559 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:09:19,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 457 transitions, 9653 flow [2024-06-28 03:09:20,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 457 transitions, 9364 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-28 03:09:20,304 INFO L231 Difference]: Finished difference. Result has 230 places, 421 transitions, 8627 flow [2024-06-28 03:09:20,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8270, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8627, PETRI_PLACES=230, PETRI_TRANSITIONS=421} [2024-06-28 03:09:20,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-28 03:09:20,305 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 421 transitions, 8627 flow [2024-06-28 03:09:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:20,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:20,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:20,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:09:20,305 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:20,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash 191872288, now seen corresponding path program 1 times [2024-06-28 03:09:20,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:20,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571621261] [2024-06-28 03:09:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:20,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:20,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571621261] [2024-06-28 03:09:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571621261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:20,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:09:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306616995] [2024-06-28 03:09:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:09:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:09:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:09:20,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:20,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 421 transitions, 8627 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:20,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:20,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:20,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:22,775 INFO L124 PetriNetUnfolderBase]: 5784/9050 cut-off events. [2024-06-28 03:09:22,775 INFO L125 PetriNetUnfolderBase]: For 310387/310405 co-relation queries the response was YES. [2024-06-28 03:09:22,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68581 conditions, 9050 events. 5784/9050 cut-off events. For 310387/310405 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 57030 event pairs, 2142 based on Foata normal form. 22/9070 useless extension candidates. Maximal degree in co-relation 68476. Up to 8366 conditions per place. [2024-06-28 03:09:22,885 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 387 selfloop transitions, 91 changer transitions 0/481 dead transitions. [2024-06-28 03:09:22,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 481 transitions, 10340 flow [2024-06-28 03:09:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:09:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:09:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:09:22,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:09:22,886 INFO L175 Difference]: Start difference. First operand has 230 places, 421 transitions, 8627 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:09:22,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 481 transitions, 10340 flow [2024-06-28 03:09:23,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 481 transitions, 9856 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 03:09:23,645 INFO L231 Difference]: Finished difference. Result has 236 places, 441 transitions, 8695 flow [2024-06-28 03:09:23,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8143, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8695, PETRI_PLACES=236, PETRI_TRANSITIONS=441} [2024-06-28 03:09:23,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-28 03:09:23,646 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 441 transitions, 8695 flow [2024-06-28 03:09:23,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:23,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:23,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:23,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:09:23,646 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:23,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash -321514178, now seen corresponding path program 5 times [2024-06-28 03:09:23,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:23,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510673922] [2024-06-28 03:09:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:23,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:24,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510673922] [2024-06-28 03:09:24,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510673922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:24,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:24,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:09:24,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455920999] [2024-06-28 03:09:24,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:24,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:09:24,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:09:24,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:09:24,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:24,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 441 transitions, 8695 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:24,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:24,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:24,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:25,923 INFO L124 PetriNetUnfolderBase]: 5812/9093 cut-off events. [2024-06-28 03:09:25,923 INFO L125 PetriNetUnfolderBase]: For 320019/320036 co-relation queries the response was YES. [2024-06-28 03:09:26,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70273 conditions, 9093 events. 5812/9093 cut-off events. For 320019/320036 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 57296 event pairs, 2147 based on Foata normal form. 16/9107 useless extension candidates. Maximal degree in co-relation 70163. Up to 8606 conditions per place. [2024-06-28 03:09:26,045 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 87 changer transitions 0/465 dead transitions. [2024-06-28 03:09:26,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 465 transitions, 9967 flow [2024-06-28 03:09:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:09:26,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:09:26,047 INFO L175 Difference]: Start difference. First operand has 236 places, 441 transitions, 8695 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:09:26,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 465 transitions, 9967 flow [2024-06-28 03:09:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 465 transitions, 9890 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-28 03:09:26,754 INFO L231 Difference]: Finished difference. Result has 242 places, 449 transitions, 8987 flow [2024-06-28 03:09:26,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8618, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8987, PETRI_PLACES=242, PETRI_TRANSITIONS=449} [2024-06-28 03:09:26,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-28 03:09:26,754 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 449 transitions, 8987 flow [2024-06-28 03:09:26,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:26,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:26,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:09:26,755 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:26,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 761131326, now seen corresponding path program 7 times [2024-06-28 03:09:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:26,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838074349] [2024-06-28 03:09:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:27,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838074349] [2024-06-28 03:09:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838074349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:27,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337352400] [2024-06-28 03:09:27,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:27,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:27,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:27,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:27,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 449 transitions, 8987 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:27,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:27,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:27,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:29,425 INFO L124 PetriNetUnfolderBase]: 5798/9100 cut-off events. [2024-06-28 03:09:29,425 INFO L125 PetriNetUnfolderBase]: For 359857/359873 co-relation queries the response was YES. [2024-06-28 03:09:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71852 conditions, 9100 events. 5798/9100 cut-off events. For 359857/359873 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57943 event pairs, 2533 based on Foata normal form. 10/9053 useless extension candidates. Maximal degree in co-relation 71738. Up to 8665 conditions per place. [2024-06-28 03:09:29,544 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 420 selfloop transitions, 42 changer transitions 0/482 dead transitions. [2024-06-28 03:09:29,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 482 transitions, 10233 flow [2024-06-28 03:09:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:09:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:09:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:09:29,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 03:09:29,545 INFO L175 Difference]: Start difference. First operand has 242 places, 449 transitions, 8987 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:09:29,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 482 transitions, 10233 flow [2024-06-28 03:09:30,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 482 transitions, 10119 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 03:09:30,439 INFO L231 Difference]: Finished difference. Result has 247 places, 453 transitions, 9122 flow [2024-06-28 03:09:30,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8873, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9122, PETRI_PLACES=247, PETRI_TRANSITIONS=453} [2024-06-28 03:09:30,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-28 03:09:30,440 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 453 transitions, 9122 flow [2024-06-28 03:09:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:30,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:30,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:30,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:09:30,440 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:30,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:30,441 INFO L85 PathProgramCache]: Analyzing trace with hash 761138766, now seen corresponding path program 8 times [2024-06-28 03:09:30,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:30,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786492583] [2024-06-28 03:09:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:31,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:31,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786492583] [2024-06-28 03:09:31,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786492583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:31,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:31,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77187802] [2024-06-28 03:09:31,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:31,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:31,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 453 transitions, 9122 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:31,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:31,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:31,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:33,020 INFO L124 PetriNetUnfolderBase]: 5832/9161 cut-off events. [2024-06-28 03:09:33,020 INFO L125 PetriNetUnfolderBase]: For 364779/364808 co-relation queries the response was YES. [2024-06-28 03:09:33,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72512 conditions, 9161 events. 5832/9161 cut-off events. For 364779/364808 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 58427 event pairs, 1976 based on Foata normal form. 22/9145 useless extension candidates. Maximal degree in co-relation 72398. Up to 7639 conditions per place. [2024-06-28 03:09:33,131 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 184 changer transitions 0/480 dead transitions. [2024-06-28 03:09:33,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 480 transitions, 10284 flow [2024-06-28 03:09:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:09:33,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:09:33,132 INFO L175 Difference]: Start difference. First operand has 247 places, 453 transitions, 9122 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:09:33,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 480 transitions, 10284 flow [2024-06-28 03:09:33,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 480 transitions, 10042 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-28 03:09:33,957 INFO L231 Difference]: Finished difference. Result has 249 places, 457 transitions, 9429 flow [2024-06-28 03:09:33,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8880, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9429, PETRI_PLACES=249, PETRI_TRANSITIONS=457} [2024-06-28 03:09:33,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-28 03:09:33,958 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 457 transitions, 9429 flow [2024-06-28 03:09:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:33,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:33,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:33,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:09:33,959 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)] === [2024-06-28 03:09:33,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1870818, now seen corresponding path program 9 times [2024-06-28 03:09:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:33,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458655846] [2024-06-28 03:09:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:33,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:34,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:34,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458655846] [2024-06-28 03:09:34,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458655846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:34,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:34,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:34,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151451062] [2024-06-28 03:09:34,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:34,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:34,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 457 transitions, 9429 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:34,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:34,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:34,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:36,437 INFO L124 PetriNetUnfolderBase]: 5830/9131 cut-off events. [2024-06-28 03:09:36,437 INFO L125 PetriNetUnfolderBase]: For 378013/378029 co-relation queries the response was YES. [2024-06-28 03:09:36,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73186 conditions, 9131 events. 5830/9131 cut-off events. For 378013/378029 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 57735 event pairs, 2515 based on Foata normal form. 4/9077 useless extension candidates. Maximal degree in co-relation 73072. Up to 8763 conditions per place. [2024-06-28 03:09:36,541 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 442 selfloop transitions, 18 changer transitions 0/480 dead transitions. [2024-06-28 03:09:36,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 480 transitions, 10479 flow [2024-06-28 03:09:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:09:36,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:09:36,542 INFO L175 Difference]: Start difference. First operand has 249 places, 457 transitions, 9429 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:09:36,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 480 transitions, 10479 flow [2024-06-28 03:09:37,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 480 transitions, 9992 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 03:09:37,462 INFO L231 Difference]: Finished difference. Result has 250 places, 459 transitions, 9035 flow [2024-06-28 03:09:37,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8942, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9035, PETRI_PLACES=250, PETRI_TRANSITIONS=459} [2024-06-28 03:09:37,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-28 03:09:37,462 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 459 transitions, 9035 flow [2024-06-28 03:09:37,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:37,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:37,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:37,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:09:37,463 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)] === [2024-06-28 03:09:37,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1017631836, now seen corresponding path program 10 times [2024-06-28 03:09:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:37,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969558347] [2024-06-28 03:09:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:37,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969558347] [2024-06-28 03:09:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969558347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:38,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671711243] [2024-06-28 03:09:38,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:38,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:38,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:38,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 459 transitions, 9035 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:38,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:38,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:38,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:40,103 INFO L124 PetriNetUnfolderBase]: 5852/9191 cut-off events. [2024-06-28 03:09:40,103 INFO L125 PetriNetUnfolderBase]: For 370514/370541 co-relation queries the response was YES. [2024-06-28 03:09:40,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72480 conditions, 9191 events. 5852/9191 cut-off events. For 370514/370541 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 58613 event pairs, 2005 based on Foata normal form. 18/9178 useless extension candidates. Maximal degree in co-relation 72366. Up to 8013 conditions per place. [2024-06-28 03:09:40,215 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 192 changer transitions 0/493 dead transitions. [2024-06-28 03:09:40,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 493 transitions, 10308 flow [2024-06-28 03:09:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 03:09:40,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-28 03:09:40,216 INFO L175 Difference]: Start difference. First operand has 250 places, 459 transitions, 9035 flow. Second operand 7 states and 139 transitions. [2024-06-28 03:09:40,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 493 transitions, 10308 flow [2024-06-28 03:09:41,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 493 transitions, 10233 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 03:09:41,119 INFO L231 Difference]: Finished difference. Result has 252 places, 463 transitions, 9562 flow [2024-06-28 03:09:41,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9562, PETRI_PLACES=252, PETRI_TRANSITIONS=463} [2024-06-28 03:09:41,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-28 03:09:41,120 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 463 transitions, 9562 flow [2024-06-28 03:09:41,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:41,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:41,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:41,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:09:41,120 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)] === [2024-06-28 03:09:41,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1017639276, now seen corresponding path program 11 times [2024-06-28 03:09:41,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:41,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401359567] [2024-06-28 03:09:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:41,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:42,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:42,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401359567] [2024-06-28 03:09:42,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401359567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:42,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:42,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:09:42,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968533396] [2024-06-28 03:09:42,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:42,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:09:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:09:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:09:42,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:09:42,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 463 transitions, 9562 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:42,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:42,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:09:42,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:43,930 INFO L124 PetriNetUnfolderBase]: 5845/9184 cut-off events. [2024-06-28 03:09:43,930 INFO L125 PetriNetUnfolderBase]: For 390713/390742 co-relation queries the response was YES. [2024-06-28 03:09:43,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73475 conditions, 9184 events. 5845/9184 cut-off events. For 390713/390742 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 58625 event pairs, 1959 based on Foata normal form. 20/9166 useless extension candidates. Maximal degree in co-relation 73360. Up to 7509 conditions per place. [2024-06-28 03:09:44,024 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 207 changer transitions 0/491 dead transitions. [2024-06-28 03:09:44,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 491 transitions, 10773 flow [2024-06-28 03:09:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 03:09:44,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-28 03:09:44,026 INFO L175 Difference]: Start difference. First operand has 252 places, 463 transitions, 9562 flow. Second operand 7 states and 134 transitions. [2024-06-28 03:09:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 491 transitions, 10773 flow [2024-06-28 03:09:44,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 491 transitions, 10288 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-28 03:09:44,850 INFO L231 Difference]: Finished difference. Result has 253 places, 467 transitions, 9695 flow [2024-06-28 03:09:44,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9085, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9695, PETRI_PLACES=253, PETRI_TRANSITIONS=467} [2024-06-28 03:09:44,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-28 03:09:44,850 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 467 transitions, 9695 flow [2024-06-28 03:09:44,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:44,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:44,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:09:44,850 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:44,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash -39976514, now seen corresponding path program 2 times [2024-06-28 03:09:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:44,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332325668] [2024-06-28 03:09:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:45,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:45,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332325668] [2024-06-28 03:09:45,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332325668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:45,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:45,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:45,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576766278] [2024-06-28 03:09:45,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:45,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:45,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:45,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:45,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:45,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:45,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 467 transitions, 9695 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:45,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:45,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:47,123 INFO L124 PetriNetUnfolderBase]: 5918/9261 cut-off events. [2024-06-28 03:09:47,124 INFO L125 PetriNetUnfolderBase]: For 353654/353654 co-relation queries the response was YES. [2024-06-28 03:09:47,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72800 conditions, 9261 events. 5918/9261 cut-off events. For 353654/353654 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 58508 event pairs, 2638 based on Foata normal form. 3/9263 useless extension candidates. Maximal degree in co-relation 72685. Up to 9068 conditions per place. [2024-06-28 03:09:47,226 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 15 changer transitions 0/481 dead transitions. [2024-06-28 03:09:47,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 481 transitions, 10730 flow [2024-06-28 03:09:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 03:09:47,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-28 03:09:47,227 INFO L175 Difference]: Start difference. First operand has 253 places, 467 transitions, 9695 flow. Second operand 7 states and 109 transitions. [2024-06-28 03:09:47,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 481 transitions, 10730 flow [2024-06-28 03:09:48,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 481 transitions, 10204 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-28 03:09:48,214 INFO L231 Difference]: Finished difference. Result has 255 places, 470 transitions, 9253 flow [2024-06-28 03:09:48,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9169, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9253, PETRI_PLACES=255, PETRI_TRANSITIONS=470} [2024-06-28 03:09:48,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-28 03:09:48,214 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 470 transitions, 9253 flow [2024-06-28 03:09:48,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:48,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:48,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:09:48,215 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:48,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -40392596, now seen corresponding path program 6 times [2024-06-28 03:09:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45415484] [2024-06-28 03:09:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:48,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:48,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:48,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45415484] [2024-06-28 03:09:48,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45415484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:48,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:48,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:48,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738474563] [2024-06-28 03:09:48,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:48,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:48,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:48,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:48,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 470 transitions, 9253 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:48,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:48,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:48,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:50,619 INFO L124 PetriNetUnfolderBase]: 5914/9257 cut-off events. [2024-06-28 03:09:50,619 INFO L125 PetriNetUnfolderBase]: For 338658/338661 co-relation queries the response was YES. [2024-06-28 03:09:50,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71122 conditions, 9257 events. 5914/9257 cut-off events. For 338658/338661 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58519 event pairs, 2640 based on Foata normal form. 4/9259 useless extension candidates. Maximal degree in co-relation 71006. Up to 9038 conditions per place. [2024-06-28 03:09:50,727 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 26 changer transitions 0/480 dead transitions. [2024-06-28 03:09:50,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 480 transitions, 10321 flow [2024-06-28 03:09:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:09:50,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-28 03:09:50,728 INFO L175 Difference]: Start difference. First operand has 255 places, 470 transitions, 9253 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:09:50,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 480 transitions, 10321 flow [2024-06-28 03:09:51,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 480 transitions, 10244 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 03:09:51,565 INFO L231 Difference]: Finished difference. Result has 257 places, 470 transitions, 9236 flow [2024-06-28 03:09:51,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9176, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9236, PETRI_PLACES=257, PETRI_TRANSITIONS=470} [2024-06-28 03:09:51,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-28 03:09:51,566 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 470 transitions, 9236 flow [2024-06-28 03:09:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:51,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:51,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:51,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:09:51,566 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:51,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash -40392224, now seen corresponding path program 3 times [2024-06-28 03:09:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:51,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811722233] [2024-06-28 03:09:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:51,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811722233] [2024-06-28 03:09:52,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811722233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:52,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:52,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439238443] [2024-06-28 03:09:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:52,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:52,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:52,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 470 transitions, 9236 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:52,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:52,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:52,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:53,847 INFO L124 PetriNetUnfolderBase]: 5905/9244 cut-off events. [2024-06-28 03:09:53,847 INFO L125 PetriNetUnfolderBase]: For 347576/347576 co-relation queries the response was YES. [2024-06-28 03:09:53,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71117 conditions, 9244 events. 5905/9244 cut-off events. For 347576/347576 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 58429 event pairs, 2634 based on Foata normal form. 3/9246 useless extension candidates. Maximal degree in co-relation 71001. Up to 9039 conditions per place. [2024-06-28 03:09:53,947 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 460 selfloop transitions, 20 changer transitions 0/483 dead transitions. [2024-06-28 03:09:53,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 483 transitions, 10240 flow [2024-06-28 03:09:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:09:53,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-28 03:09:53,947 INFO L175 Difference]: Start difference. First operand has 257 places, 470 transitions, 9236 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:09:53,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 483 transitions, 10240 flow [2024-06-28 03:09:54,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 483 transitions, 10034 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 03:09:54,809 INFO L231 Difference]: Finished difference. Result has 257 places, 470 transitions, 9076 flow [2024-06-28 03:09:54,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9030, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9076, PETRI_PLACES=257, PETRI_TRANSITIONS=470} [2024-06-28 03:09:54,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-28 03:09:54,810 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 470 transitions, 9076 flow [2024-06-28 03:09:54,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:54,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:54,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:54,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:09:54,810 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:54,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash -217459388, now seen corresponding path program 1 times [2024-06-28 03:09:54,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:54,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531481077] [2024-06-28 03:09:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:54,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:55,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:55,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531481077] [2024-06-28 03:09:55,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531481077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:55,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:55,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:55,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710348809] [2024-06-28 03:09:55,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:55,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:55,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:55,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:55,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:55,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 470 transitions, 9076 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:55,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:55,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:55,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:09:57,297 INFO L124 PetriNetUnfolderBase]: 5915/9258 cut-off events. [2024-06-28 03:09:57,297 INFO L125 PetriNetUnfolderBase]: For 356150/356150 co-relation queries the response was YES. [2024-06-28 03:09:57,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70953 conditions, 9258 events. 5915/9258 cut-off events. For 356150/356150 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 58557 event pairs, 2633 based on Foata normal form. 2/9259 useless extension candidates. Maximal degree in co-relation 70839. Up to 9045 conditions per place. [2024-06-28 03:09:57,394 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 469 selfloop transitions, 17 changer transitions 0/489 dead transitions. [2024-06-28 03:09:57,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 489 transitions, 10152 flow [2024-06-28 03:09:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:09:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:09:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:09:57,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-28 03:09:57,395 INFO L175 Difference]: Start difference. First operand has 257 places, 470 transitions, 9076 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:09:57,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 489 transitions, 10152 flow [2024-06-28 03:09:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 489 transitions, 10060 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 03:09:58,259 INFO L231 Difference]: Finished difference. Result has 258 places, 473 transitions, 9067 flow [2024-06-28 03:09:58,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9067, PETRI_PLACES=258, PETRI_TRANSITIONS=473} [2024-06-28 03:09:58,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-28 03:09:58,260 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 473 transitions, 9067 flow [2024-06-28 03:09:58,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:58,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:09:58,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:09:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:09:58,260 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:09:58,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:09:58,260 INFO L85 PathProgramCache]: Analyzing trace with hash -217339232, now seen corresponding path program 1 times [2024-06-28 03:09:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:09:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8557888] [2024-06-28 03:09:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:09:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:09:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:09:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:09:58,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:09:58,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8557888] [2024-06-28 03:09:58,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8557888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:09:58,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:09:58,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:09:58,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762894403] [2024-06-28 03:09:58,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:09:58,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:09:58,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:09:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:09:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:09:58,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:09:58,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 473 transitions, 9067 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:09:58,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:09:58,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:09:58,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:00,756 INFO L124 PetriNetUnfolderBase]: 5930/9279 cut-off events. [2024-06-28 03:10:00,756 INFO L125 PetriNetUnfolderBase]: For 354988/354988 co-relation queries the response was YES. [2024-06-28 03:10:00,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71344 conditions, 9279 events. 5930/9279 cut-off events. For 354988/354988 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58596 event pairs, 2631 based on Foata normal form. 3/9281 useless extension candidates. Maximal degree in co-relation 71229. Up to 9045 conditions per place. [2024-06-28 03:10:00,843 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 30 changer transitions 0/498 dead transitions. [2024-06-28 03:10:00,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 498 transitions, 10309 flow [2024-06-28 03:10:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:10:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:10:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 03:10:00,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-28 03:10:00,845 INFO L175 Difference]: Start difference. First operand has 258 places, 473 transitions, 9067 flow. Second operand 7 states and 121 transitions. [2024-06-28 03:10:00,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 498 transitions, 10309 flow [2024-06-28 03:10:01,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 498 transitions, 10256 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 03:10:01,828 INFO L231 Difference]: Finished difference. Result has 261 places, 481 transitions, 9193 flow [2024-06-28 03:10:01,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9014, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9193, PETRI_PLACES=261, PETRI_TRANSITIONS=481} [2024-06-28 03:10:01,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-28 03:10:01,828 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 481 transitions, 9193 flow [2024-06-28 03:10:01,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:01,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:01,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:10:01,828 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:01,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1974090064, now seen corresponding path program 2 times [2024-06-28 03:10:01,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:01,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729441147] [2024-06-28 03:10:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:02,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729441147] [2024-06-28 03:10:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729441147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:02,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:02,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279823802] [2024-06-28 03:10:02,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:02,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:02,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:02,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:02,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 481 transitions, 9193 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:02,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:02,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:02,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:04,228 INFO L124 PetriNetUnfolderBase]: 5940/9293 cut-off events. [2024-06-28 03:10:04,228 INFO L125 PetriNetUnfolderBase]: For 367901/367901 co-relation queries the response was YES. [2024-06-28 03:10:04,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72230 conditions, 9293 events. 5940/9293 cut-off events. For 367901/367901 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58662 event pairs, 2633 based on Foata normal form. 2/9294 useless extension candidates. Maximal degree in co-relation 72114. Up to 9056 conditions per place. [2024-06-28 03:10:04,495 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 471 selfloop transitions, 29 changer transitions 0/503 dead transitions. [2024-06-28 03:10:04,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 503 transitions, 10435 flow [2024-06-28 03:10:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:10:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:10:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:10:04,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-28 03:10:04,496 INFO L175 Difference]: Start difference. First operand has 261 places, 481 transitions, 9193 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:10:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 503 transitions, 10435 flow [2024-06-28 03:10:05,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 503 transitions, 10370 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 03:10:05,257 INFO L231 Difference]: Finished difference. Result has 265 places, 487 transitions, 9286 flow [2024-06-28 03:10:05,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9128, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9286, PETRI_PLACES=265, PETRI_TRANSITIONS=487} [2024-06-28 03:10:05,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-28 03:10:05,257 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 487 transitions, 9286 flow [2024-06-28 03:10:05,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:05,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:05,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:05,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:10:05,258 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:05,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2110671006, now seen corresponding path program 2 times [2024-06-28 03:10:05,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:05,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265219079] [2024-06-28 03:10:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:05,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:05,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265219079] [2024-06-28 03:10:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265219079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:05,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:05,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:05,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697843318] [2024-06-28 03:10:05,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:05,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:05,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:05,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:05,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 487 transitions, 9286 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:05,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:05,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:05,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:07,651 INFO L124 PetriNetUnfolderBase]: 5955/9315 cut-off events. [2024-06-28 03:10:07,652 INFO L125 PetriNetUnfolderBase]: For 383132/383135 co-relation queries the response was YES. [2024-06-28 03:10:07,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73126 conditions, 9315 events. 5955/9315 cut-off events. For 383132/383135 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 58794 event pairs, 2633 based on Foata normal form. 5/9318 useless extension candidates. Maximal degree in co-relation 73008. Up to 9073 conditions per place. [2024-06-28 03:10:07,768 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 36 changer transitions 0/505 dead transitions. [2024-06-28 03:10:07,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 505 transitions, 10496 flow [2024-06-28 03:10:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:10:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:10:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:10:07,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-28 03:10:07,769 INFO L175 Difference]: Start difference. First operand has 265 places, 487 transitions, 9286 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:10:07,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 505 transitions, 10496 flow [2024-06-28 03:10:08,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 505 transitions, 10440 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 03:10:08,758 INFO L231 Difference]: Finished difference. Result has 269 places, 492 transitions, 9384 flow [2024-06-28 03:10:08,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9230, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9384, PETRI_PLACES=269, PETRI_TRANSITIONS=492} [2024-06-28 03:10:08,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-28 03:10:08,759 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 492 transitions, 9384 flow [2024-06-28 03:10:08,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:08,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:08,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:08,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:10:08,760 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:08,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2036756594, now seen corresponding path program 3 times [2024-06-28 03:10:08,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:08,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213414265] [2024-06-28 03:10:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:08,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:09,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:09,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213414265] [2024-06-28 03:10:09,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213414265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:09,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:09,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006087062] [2024-06-28 03:10:09,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:09,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:09,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:09,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:09,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 492 transitions, 9384 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:09,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:09,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:09,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:11,348 INFO L124 PetriNetUnfolderBase]: 5946/9303 cut-off events. [2024-06-28 03:10:11,348 INFO L125 PetriNetUnfolderBase]: For 391694/391697 co-relation queries the response was YES. [2024-06-28 03:10:11,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73206 conditions, 9303 events. 5946/9303 cut-off events. For 391694/391697 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 58767 event pairs, 2631 based on Foata normal form. 5/9306 useless extension candidates. Maximal degree in co-relation 73086. Up to 9066 conditions per place. [2024-06-28 03:10:11,472 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 468 selfloop transitions, 35 changer transitions 0/506 dead transitions. [2024-06-28 03:10:11,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 506 transitions, 10440 flow [2024-06-28 03:10:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:10:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:10:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:10:11,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-28 03:10:11,473 INFO L175 Difference]: Start difference. First operand has 269 places, 492 transitions, 9384 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:10:11,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 506 transitions, 10440 flow [2024-06-28 03:10:12,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 506 transitions, 10313 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 03:10:12,371 INFO L231 Difference]: Finished difference. Result has 272 places, 492 transitions, 9335 flow [2024-06-28 03:10:12,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9257, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9335, PETRI_PLACES=272, PETRI_TRANSITIONS=492} [2024-06-28 03:10:12,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-28 03:10:12,372 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 492 transitions, 9335 flow [2024-06-28 03:10:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:12,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:12,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:10:12,373 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:12,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2036756408, now seen corresponding path program 3 times [2024-06-28 03:10:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:12,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130673343] [2024-06-28 03:10:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130673343] [2024-06-28 03:10:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130673343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:12,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:12,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:12,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711397309] [2024-06-28 03:10:12,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:12,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:12,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:12,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:12,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 492 transitions, 9335 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:12,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:12,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:12,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:14,781 INFO L124 PetriNetUnfolderBase]: 5940/9296 cut-off events. [2024-06-28 03:10:14,782 INFO L125 PetriNetUnfolderBase]: For 399550/399553 co-relation queries the response was YES. [2024-06-28 03:10:14,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73217 conditions, 9296 events. 5940/9296 cut-off events. For 399550/399553 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 58765 event pairs, 2643 based on Foata normal form. 2/9295 useless extension candidates. Maximal degree in co-relation 73096. Up to 9060 conditions per place. [2024-06-28 03:10:14,901 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 471 selfloop transitions, 29 changer transitions 0/503 dead transitions. [2024-06-28 03:10:14,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 503 transitions, 10377 flow [2024-06-28 03:10:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:10:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:10:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:10:14,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-28 03:10:14,902 INFO L175 Difference]: Start difference. First operand has 272 places, 492 transitions, 9335 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:10:14,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 503 transitions, 10377 flow [2024-06-28 03:10:15,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 503 transitions, 10258 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 03:10:15,798 INFO L231 Difference]: Finished difference. Result has 272 places, 492 transitions, 9280 flow [2024-06-28 03:10:15,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9216, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9280, PETRI_PLACES=272, PETRI_TRANSITIONS=492} [2024-06-28 03:10:15,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-28 03:10:15,798 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 492 transitions, 9280 flow [2024-06-28 03:10:15,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:15,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:10:15,799 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:15,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2118559481, now seen corresponding path program 1 times [2024-06-28 03:10:15,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:15,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351915707] [2024-06-28 03:10:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:15,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351915707] [2024-06-28 03:10:16,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351915707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:16,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559397006] [2024-06-28 03:10:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:16,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:16,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:16,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 492 transitions, 9280 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:16,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:16,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:16,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:18,159 INFO L124 PetriNetUnfolderBase]: 5977/9316 cut-off events. [2024-06-28 03:10:18,159 INFO L125 PetriNetUnfolderBase]: For 408995/409040 co-relation queries the response was YES. [2024-06-28 03:10:18,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73761 conditions, 9316 events. 5977/9316 cut-off events. For 408995/409040 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 58584 event pairs, 1873 based on Foata normal form. 44/9358 useless extension candidates. Maximal degree in co-relation 73639. Up to 8632 conditions per place. [2024-06-28 03:10:18,262 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 443 selfloop transitions, 111 changer transitions 0/557 dead transitions. [2024-06-28 03:10:18,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 557 transitions, 11270 flow [2024-06-28 03:10:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 03:10:18,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-28 03:10:18,263 INFO L175 Difference]: Start difference. First operand has 272 places, 492 transitions, 9280 flow. Second operand 8 states and 150 transitions. [2024-06-28 03:10:18,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 557 transitions, 11270 flow [2024-06-28 03:10:19,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 557 transitions, 11173 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 03:10:19,226 INFO L231 Difference]: Finished difference. Result has 276 places, 521 transitions, 10046 flow [2024-06-28 03:10:19,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9183, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10046, PETRI_PLACES=276, PETRI_TRANSITIONS=521} [2024-06-28 03:10:19,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-28 03:10:19,227 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 521 transitions, 10046 flow [2024-06-28 03:10:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:19,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:19,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:19,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:10:19,227 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:19,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1830870424, now seen corresponding path program 2 times [2024-06-28 03:10:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:19,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055961961] [2024-06-28 03:10:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:19,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:19,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055961961] [2024-06-28 03:10:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055961961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:19,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:19,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191118778] [2024-06-28 03:10:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:19,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:19,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:19,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:19,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:19,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 521 transitions, 10046 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:19,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:19,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:19,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:22,034 INFO L124 PetriNetUnfolderBase]: 6037/9413 cut-off events. [2024-06-28 03:10:22,034 INFO L125 PetriNetUnfolderBase]: For 433442/433456 co-relation queries the response was YES. [2024-06-28 03:10:22,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76162 conditions, 9413 events. 6037/9413 cut-off events. For 433442/433456 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 59432 event pairs, 2080 based on Foata normal form. 18/9429 useless extension candidates. Maximal degree in co-relation 76037. Up to 8774 conditions per place. [2024-06-28 03:10:22,142 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 452 selfloop transitions, 127 changer transitions 0/582 dead transitions. [2024-06-28 03:10:22,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 582 transitions, 11873 flow [2024-06-28 03:10:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:10:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:10:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:10:22,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-28 03:10:22,143 INFO L175 Difference]: Start difference. First operand has 276 places, 521 transitions, 10046 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:10:22,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 582 transitions, 11873 flow [2024-06-28 03:10:23,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 582 transitions, 11784 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-28 03:10:23,220 INFO L231 Difference]: Finished difference. Result has 285 places, 551 transitions, 10741 flow [2024-06-28 03:10:23,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9957, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10741, PETRI_PLACES=285, PETRI_TRANSITIONS=551} [2024-06-28 03:10:23,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-28 03:10:23,221 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 551 transitions, 10741 flow [2024-06-28 03:10:23,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:23,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:23,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:10:23,221 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:23,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash -911015431, now seen corresponding path program 1 times [2024-06-28 03:10:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:23,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105969062] [2024-06-28 03:10:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105969062] [2024-06-28 03:10:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105969062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901197149] [2024-06-28 03:10:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:23,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:23,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 551 transitions, 10741 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:23,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:25,797 INFO L124 PetriNetUnfolderBase]: 6063/9449 cut-off events. [2024-06-28 03:10:25,797 INFO L125 PetriNetUnfolderBase]: For 450858/450882 co-relation queries the response was YES. [2024-06-28 03:10:25,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78241 conditions, 9449 events. 6063/9449 cut-off events. For 450858/450882 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 59572 event pairs, 2098 based on Foata normal form. 22/9469 useless extension candidates. Maximal degree in co-relation 78112. Up to 8970 conditions per place. [2024-06-28 03:10:25,930 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 96 changer transitions 0/584 dead transitions. [2024-06-28 03:10:25,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 584 transitions, 12509 flow [2024-06-28 03:10:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:10:25,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 03:10:25,931 INFO L175 Difference]: Start difference. First operand has 285 places, 551 transitions, 10741 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:10:25,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 584 transitions, 12509 flow [2024-06-28 03:10:27,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 584 transitions, 12393 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 03:10:27,098 INFO L231 Difference]: Finished difference. Result has 289 places, 560 transitions, 11041 flow [2024-06-28 03:10:27,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10625, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11041, PETRI_PLACES=289, PETRI_TRANSITIONS=560} [2024-06-28 03:10:27,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-28 03:10:27,099 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 560 transitions, 11041 flow [2024-06-28 03:10:27,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:27,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:27,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:27,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:10:27,099 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:27,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash -121584511, now seen corresponding path program 1 times [2024-06-28 03:10:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:27,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457928660] [2024-06-28 03:10:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:27,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:28,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:28,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457928660] [2024-06-28 03:10:28,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457928660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:28,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:28,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:10:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126370978] [2024-06-28 03:10:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:10:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:10:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:10:28,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:10:28,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 560 transitions, 11041 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:28,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:28,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:10:28,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:30,480 INFO L124 PetriNetUnfolderBase]: 6077/9511 cut-off events. [2024-06-28 03:10:30,480 INFO L125 PetriNetUnfolderBase]: For 506220/506262 co-relation queries the response was YES. [2024-06-28 03:10:30,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79736 conditions, 9511 events. 6077/9511 cut-off events. For 506220/506262 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 60681 event pairs, 1896 based on Foata normal form. 36/9511 useless extension candidates. Maximal degree in co-relation 79605. Up to 8410 conditions per place. [2024-06-28 03:10:30,610 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 409 selfloop transitions, 167 changer transitions 0/604 dead transitions. [2024-06-28 03:10:30,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 604 transitions, 12471 flow [2024-06-28 03:10:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:10:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:10:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 03:10:30,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:10:30,612 INFO L175 Difference]: Start difference. First operand has 289 places, 560 transitions, 11041 flow. Second operand 10 states and 190 transitions. [2024-06-28 03:10:30,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 604 transitions, 12471 flow [2024-06-28 03:10:31,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 604 transitions, 12328 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 03:10:31,982 INFO L231 Difference]: Finished difference. Result has 296 places, 564 transitions, 11396 flow [2024-06-28 03:10:31,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10898, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11396, PETRI_PLACES=296, PETRI_TRANSITIONS=564} [2024-06-28 03:10:31,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-28 03:10:31,983 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 564 transitions, 11396 flow [2024-06-28 03:10:31,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:31,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:31,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:31,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:10:31,984 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:31,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash 922409745, now seen corresponding path program 1 times [2024-06-28 03:10:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:31,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056162772] [2024-06-28 03:10:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:31,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:32,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:32,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056162772] [2024-06-28 03:10:32,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056162772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:32,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:32,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:10:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999867789] [2024-06-28 03:10:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:32,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:10:32,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:10:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:10:32,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:32,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 564 transitions, 11396 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:32,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:32,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:32,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:35,052 INFO L124 PetriNetUnfolderBase]: 6193/9651 cut-off events. [2024-06-28 03:10:35,052 INFO L125 PetriNetUnfolderBase]: For 497297/497311 co-relation queries the response was YES. [2024-06-28 03:10:35,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81066 conditions, 9651 events. 6193/9651 cut-off events. For 497297/497311 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 61224 event pairs, 2123 based on Foata normal form. 18/9667 useless extension candidates. Maximal degree in co-relation 80933. Up to 8913 conditions per place. [2024-06-28 03:10:35,188 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 464 selfloop transitions, 153 changer transitions 0/620 dead transitions. [2024-06-28 03:10:35,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 620 transitions, 13280 flow [2024-06-28 03:10:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:10:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:10:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 03:10:35,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-28 03:10:35,189 INFO L175 Difference]: Start difference. First operand has 296 places, 564 transitions, 11396 flow. Second operand 10 states and 183 transitions. [2024-06-28 03:10:35,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 620 transitions, 13280 flow [2024-06-28 03:10:36,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 620 transitions, 13020 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:36,753 INFO L231 Difference]: Finished difference. Result has 303 places, 585 transitions, 11932 flow [2024-06-28 03:10:36,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11136, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11932, PETRI_PLACES=303, PETRI_TRANSITIONS=585} [2024-06-28 03:10:36,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-28 03:10:36,754 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 585 transitions, 11932 flow [2024-06-28 03:10:36,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:36,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:36,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:36,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:10:36,754 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:36,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:36,755 INFO L85 PathProgramCache]: Analyzing trace with hash 137088893, now seen corresponding path program 2 times [2024-06-28 03:10:36,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:36,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331072076] [2024-06-28 03:10:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:36,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:37,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331072076] [2024-06-28 03:10:37,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331072076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:37,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:37,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:10:37,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314023967] [2024-06-28 03:10:37,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:37,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:10:37,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:10:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:10:38,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:10:38,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 585 transitions, 11932 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:38,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:38,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:10:38,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:40,496 INFO L124 PetriNetUnfolderBase]: 6214/9720 cut-off events. [2024-06-28 03:10:40,497 INFO L125 PetriNetUnfolderBase]: For 554283/554315 co-relation queries the response was YES. [2024-06-28 03:10:40,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84393 conditions, 9720 events. 6214/9720 cut-off events. For 554283/554315 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62232 event pairs, 1955 based on Foata normal form. 28/9706 useless extension candidates. Maximal degree in co-relation 84256. Up to 8620 conditions per place. [2024-06-28 03:10:40,619 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 425 selfloop transitions, 178 changer transitions 0/631 dead transitions. [2024-06-28 03:10:40,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 631 transitions, 13448 flow [2024-06-28 03:10:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:10:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:10:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 03:10:40,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-28 03:10:40,621 INFO L175 Difference]: Start difference. First operand has 303 places, 585 transitions, 11932 flow. Second operand 10 states and 192 transitions. [2024-06-28 03:10:40,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 631 transitions, 13448 flow [2024-06-28 03:10:42,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 631 transitions, 13329 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-28 03:10:42,056 INFO L231 Difference]: Finished difference. Result has 310 places, 591 transitions, 12406 flow [2024-06-28 03:10:42,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11813, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12406, PETRI_PLACES=310, PETRI_TRANSITIONS=591} [2024-06-28 03:10:42,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-28 03:10:42,056 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 591 transitions, 12406 flow [2024-06-28 03:10:42,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:42,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:42,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:42,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:10:42,057 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:42,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash 946276277, now seen corresponding path program 3 times [2024-06-28 03:10:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:42,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555202708] [2024-06-28 03:10:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:43,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555202708] [2024-06-28 03:10:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555202708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:43,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:10:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260146541] [2024-06-28 03:10:43,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:43,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:10:43,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:10:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:10:43,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:10:43,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 591 transitions, 12406 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:43,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:43,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:10:43,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:45,686 INFO L124 PetriNetUnfolderBase]: 6229/9750 cut-off events. [2024-06-28 03:10:45,686 INFO L125 PetriNetUnfolderBase]: For 576287/576329 co-relation queries the response was YES. [2024-06-28 03:10:45,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85558 conditions, 9750 events. 6229/9750 cut-off events. For 576287/576329 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 62599 event pairs, 1896 based on Foata normal form. 36/9740 useless extension candidates. Maximal degree in co-relation 85417. Up to 8473 conditions per place. [2024-06-28 03:10:45,803 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 421 selfloop transitions, 182 changer transitions 0/631 dead transitions. [2024-06-28 03:10:45,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 631 transitions, 13826 flow [2024-06-28 03:10:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:10:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:10:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 03:10:45,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:10:45,804 INFO L175 Difference]: Start difference. First operand has 310 places, 591 transitions, 12406 flow. Second operand 10 states and 190 transitions. [2024-06-28 03:10:45,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 631 transitions, 13826 flow [2024-06-28 03:10:47,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 631 transitions, 13477 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 03:10:47,239 INFO L231 Difference]: Finished difference. Result has 313 places, 592 transitions, 12482 flow [2024-06-28 03:10:47,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12057, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12482, PETRI_PLACES=313, PETRI_TRANSITIONS=592} [2024-06-28 03:10:47,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-28 03:10:47,240 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 592 transitions, 12482 flow [2024-06-28 03:10:47,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:47,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:47,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:47,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:10:47,240 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:47,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 192193045, now seen corresponding path program 2 times [2024-06-28 03:10:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:47,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529463586] [2024-06-28 03:10:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:47,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:47,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:47,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529463586] [2024-06-28 03:10:47,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529463586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:47,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:47,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:10:47,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141594668] [2024-06-28 03:10:47,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:47,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:10:47,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:10:47,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:10:47,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:47,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 592 transitions, 12482 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:47,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:47,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:47,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:49,988 INFO L124 PetriNetUnfolderBase]: 6269/9784 cut-off events. [2024-06-28 03:10:49,988 INFO L125 PetriNetUnfolderBase]: For 537247/537271 co-relation queries the response was YES. [2024-06-28 03:10:50,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84826 conditions, 9784 events. 6269/9784 cut-off events. For 537247/537271 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62286 event pairs, 2179 based on Foata normal form. 22/9804 useless extension candidates. Maximal degree in co-relation 84684. Up to 9306 conditions per place. [2024-06-28 03:10:50,138 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 95 changer transitions 0/612 dead transitions. [2024-06-28 03:10:50,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 612 transitions, 13992 flow [2024-06-28 03:10:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:10:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:10:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:10:50,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 03:10:50,139 INFO L175 Difference]: Start difference. First operand has 313 places, 592 transitions, 12482 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:10:50,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 612 transitions, 13992 flow [2024-06-28 03:10:51,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 612 transitions, 13545 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-28 03:10:51,721 INFO L231 Difference]: Finished difference. Result has 313 places, 592 transitions, 12236 flow [2024-06-28 03:10:51,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12035, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12236, PETRI_PLACES=313, PETRI_TRANSITIONS=592} [2024-06-28 03:10:51,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-28 03:10:51,722 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 592 transitions, 12236 flow [2024-06-28 03:10:51,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:51,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:51,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:51,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:10:51,722 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:51,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1625737221, now seen corresponding path program 2 times [2024-06-28 03:10:51,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:51,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936328614] [2024-06-28 03:10:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:51,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:52,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:52,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936328614] [2024-06-28 03:10:52,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936328614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:52,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:52,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:10:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573632223] [2024-06-28 03:10:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:52,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:10:52,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:52,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:10:52,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:10:52,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:52,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 592 transitions, 12236 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:52,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:52,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:52,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:55,050 INFO L124 PetriNetUnfolderBase]: 6319/9850 cut-off events. [2024-06-28 03:10:55,050 INFO L125 PetriNetUnfolderBase]: For 543233/543247 co-relation queries the response was YES. [2024-06-28 03:10:55,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84794 conditions, 9850 events. 6319/9850 cut-off events. For 543233/543247 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62686 event pairs, 2154 based on Foata normal form. 14/9862 useless extension candidates. Maximal degree in co-relation 84651. Up to 9311 conditions per place. [2024-06-28 03:10:55,186 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 520 selfloop transitions, 115 changer transitions 0/638 dead transitions. [2024-06-28 03:10:55,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 638 transitions, 14172 flow [2024-06-28 03:10:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:10:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:10:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 03:10:55,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-28 03:10:55,187 INFO L175 Difference]: Start difference. First operand has 313 places, 592 transitions, 12236 flow. Second operand 10 states and 178 transitions. [2024-06-28 03:10:55,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 638 transitions, 14172 flow [2024-06-28 03:10:56,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 638 transitions, 13977 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:10:56,678 INFO L231 Difference]: Finished difference. Result has 318 places, 609 transitions, 12570 flow [2024-06-28 03:10:56,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12053, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12570, PETRI_PLACES=318, PETRI_TRANSITIONS=609} [2024-06-28 03:10:56,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-28 03:10:56,678 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 609 transitions, 12570 flow [2024-06-28 03:10:56,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:56,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:10:56,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:10:56,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:10:56,679 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:10:56,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:10:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash 208276558, now seen corresponding path program 3 times [2024-06-28 03:10:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:10:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884716978] [2024-06-28 03:10:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:10:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:10:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:10:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:10:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:10:57,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884716978] [2024-06-28 03:10:57,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884716978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:10:57,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:10:57,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:10:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120073448] [2024-06-28 03:10:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:10:57,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:10:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:10:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:10:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:10:57,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:10:57,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 609 transitions, 12570 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:10:57,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:10:57,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:10:57,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:10:59,933 INFO L124 PetriNetUnfolderBase]: 6355/9904 cut-off events. [2024-06-28 03:10:59,934 INFO L125 PetriNetUnfolderBase]: For 537402/537430 co-relation queries the response was YES. [2024-06-28 03:11:00,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85040 conditions, 9904 events. 6355/9904 cut-off events. For 537402/537430 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 63071 event pairs, 2153 based on Foata normal form. 30/9932 useless extension candidates. Maximal degree in co-relation 84896. Up to 9141 conditions per place. [2024-06-28 03:11:00,053 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 517 selfloop transitions, 128 changer transitions 0/648 dead transitions. [2024-06-28 03:11:00,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 648 transitions, 14479 flow [2024-06-28 03:11:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:11:00,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-28 03:11:00,054 INFO L175 Difference]: Start difference. First operand has 318 places, 609 transitions, 12570 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:11:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 648 transitions, 14479 flow [2024-06-28 03:11:01,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 648 transitions, 14299 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:11:01,364 INFO L231 Difference]: Finished difference. Result has 321 places, 616 transitions, 12785 flow [2024-06-28 03:11:01,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12390, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12785, PETRI_PLACES=321, PETRI_TRANSITIONS=616} [2024-06-28 03:11:01,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-28 03:11:01,365 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 616 transitions, 12785 flow [2024-06-28 03:11:01,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:01,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:01,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:01,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:11:01,365 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:01,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash -278806633, now seen corresponding path program 3 times [2024-06-28 03:11:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218904727] [2024-06-28 03:11:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:02,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:02,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218904727] [2024-06-28 03:11:02,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218904727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:02,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:02,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:11:02,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140481738] [2024-06-28 03:11:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:02,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:11:02,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:11:02,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:11:02,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:02,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 616 transitions, 12785 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:02,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:02,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:02,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:04,818 INFO L124 PetriNetUnfolderBase]: 6351/9900 cut-off events. [2024-06-28 03:11:04,818 INFO L125 PetriNetUnfolderBase]: For 542971/542999 co-relation queries the response was YES. [2024-06-28 03:11:04,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85534 conditions, 9900 events. 6351/9900 cut-off events. For 542971/542999 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 63065 event pairs, 2165 based on Foata normal form. 26/9924 useless extension candidates. Maximal degree in co-relation 85389. Up to 9415 conditions per place. [2024-06-28 03:11:04,951 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 537 selfloop transitions, 98 changer transitions 0/638 dead transitions. [2024-06-28 03:11:04,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 638 transitions, 14361 flow [2024-06-28 03:11:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:11:04,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-28 03:11:04,952 INFO L175 Difference]: Start difference. First operand has 321 places, 616 transitions, 12785 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:11:04,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 638 transitions, 14361 flow [2024-06-28 03:11:06,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 638 transitions, 14061 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 03:11:06,423 INFO L231 Difference]: Finished difference. Result has 325 places, 617 transitions, 12698 flow [2024-06-28 03:11:06,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12485, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12698, PETRI_PLACES=325, PETRI_TRANSITIONS=617} [2024-06-28 03:11:06,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-28 03:11:06,423 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 617 transitions, 12698 flow [2024-06-28 03:11:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:06,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:06,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:06,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:11:06,424 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:06,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -278795132, now seen corresponding path program 4 times [2024-06-28 03:11:06,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:06,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430638858] [2024-06-28 03:11:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:07,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:07,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430638858] [2024-06-28 03:11:07,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430638858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:07,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:07,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:11:07,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829661290] [2024-06-28 03:11:07,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:07,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:11:07,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:07,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:11:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:11:07,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:07,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 617 transitions, 12698 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:07,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:07,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:07,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:09,640 INFO L124 PetriNetUnfolderBase]: 6339/9885 cut-off events. [2024-06-28 03:11:09,640 INFO L125 PetriNetUnfolderBase]: For 552476/552504 co-relation queries the response was YES. [2024-06-28 03:11:09,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84901 conditions, 9885 events. 6339/9885 cut-off events. For 552476/552504 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62936 event pairs, 2151 based on Foata normal form. 30/9913 useless extension candidates. Maximal degree in co-relation 84755. Up to 9132 conditions per place. [2024-06-28 03:11:09,750 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 516 selfloop transitions, 128 changer transitions 0/647 dead transitions. [2024-06-28 03:11:09,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 647 transitions, 14468 flow [2024-06-28 03:11:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:11:09,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:11:09,752 INFO L175 Difference]: Start difference. First operand has 325 places, 617 transitions, 12698 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:11:09,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 647 transitions, 14468 flow [2024-06-28 03:11:10,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 647 transitions, 14229 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 03:11:10,870 INFO L231 Difference]: Finished difference. Result has 327 places, 617 transitions, 12728 flow [2024-06-28 03:11:10,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12459, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12728, PETRI_PLACES=327, PETRI_TRANSITIONS=617} [2024-06-28 03:11:10,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-28 03:11:10,871 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 617 transitions, 12728 flow [2024-06-28 03:11:10,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:10,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:10,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:10,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:11:10,871 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)] === [2024-06-28 03:11:10,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1437735739, now seen corresponding path program 4 times [2024-06-28 03:11:10,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:10,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200148617] [2024-06-28 03:11:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:10,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:11,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200148617] [2024-06-28 03:11:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200148617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:11,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:11:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095433065] [2024-06-28 03:11:11,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:11,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:11:11,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:11:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:11:12,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:11:12,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 617 transitions, 12728 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:12,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:12,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:11:12,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:14,567 INFO L124 PetriNetUnfolderBase]: 6383/10012 cut-off events. [2024-06-28 03:11:14,568 INFO L125 PetriNetUnfolderBase]: For 634281/634327 co-relation queries the response was YES. [2024-06-28 03:11:14,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87190 conditions, 10012 events. 6383/10012 cut-off events. For 634281/634327 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 64830 event pairs, 1926 based on Foata normal form. 46/10012 useless extension candidates. Maximal degree in co-relation 87043. Up to 8610 conditions per place. [2024-06-28 03:11:14,703 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 184 changer transitions 0/658 dead transitions. [2024-06-28 03:11:14,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 658 transitions, 14360 flow [2024-06-28 03:11:14,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:11:14,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-28 03:11:14,704 INFO L175 Difference]: Start difference. First operand has 327 places, 617 transitions, 12728 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:11:14,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 658 transitions, 14360 flow [2024-06-28 03:11:16,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 658 transitions, 14105 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 03:11:16,105 INFO L231 Difference]: Finished difference. Result has 329 places, 620 transitions, 12994 flow [2024-06-28 03:11:16,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12994, PETRI_PLACES=329, PETRI_TRANSITIONS=620} [2024-06-28 03:11:16,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-28 03:11:16,106 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 620 transitions, 12994 flow [2024-06-28 03:11:16,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:16,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:16,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:16,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:11:16,106 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:16,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1141751911, now seen corresponding path program 2 times [2024-06-28 03:11:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:16,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800255831] [2024-06-28 03:11:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:16,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:16,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:16,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800255831] [2024-06-28 03:11:16,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800255831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:16,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:16,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:11:16,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567222169] [2024-06-28 03:11:16,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:16,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:11:16,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:16,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:11:16,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:11:17,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:17,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 620 transitions, 12994 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:17,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:17,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:17,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:19,423 INFO L124 PetriNetUnfolderBase]: 6542/10192 cut-off events. [2024-06-28 03:11:19,423 INFO L125 PetriNetUnfolderBase]: For 596576/596590 co-relation queries the response was YES. [2024-06-28 03:11:19,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88495 conditions, 10192 events. 6542/10192 cut-off events. For 596576/596590 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 65193 event pairs, 2227 based on Foata normal form. 14/10204 useless extension candidates. Maximal degree in co-relation 88347. Up to 9227 conditions per place. [2024-06-28 03:11:19,580 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 499 selfloop transitions, 180 changer transitions 0/682 dead transitions. [2024-06-28 03:11:19,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 682 transitions, 15177 flow [2024-06-28 03:11:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:11:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:11:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 03:11:19,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-28 03:11:19,581 INFO L175 Difference]: Start difference. First operand has 329 places, 620 transitions, 12994 flow. Second operand 10 states and 191 transitions. [2024-06-28 03:11:19,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 682 transitions, 15177 flow [2024-06-28 03:11:21,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 682 transitions, 14702 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-28 03:11:21,278 INFO L231 Difference]: Finished difference. Result has 334 places, 642 transitions, 13218 flow [2024-06-28 03:11:21,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12519, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13218, PETRI_PLACES=334, PETRI_TRANSITIONS=642} [2024-06-28 03:11:21,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-28 03:11:21,279 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 642 transitions, 13218 flow [2024-06-28 03:11:21,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:21,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:21,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:21,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:11:21,280 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:21,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash 641055421, now seen corresponding path program 4 times [2024-06-28 03:11:21,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:21,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90596068] [2024-06-28 03:11:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:21,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:22,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:22,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90596068] [2024-06-28 03:11:22,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90596068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:22,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:22,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:11:22,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480196812] [2024-06-28 03:11:22,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:22,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:11:22,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:22,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:11:22,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:11:22,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:22,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 642 transitions, 13218 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:22,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:22,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:22,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:24,563 INFO L124 PetriNetUnfolderBase]: 6552/10209 cut-off events. [2024-06-28 03:11:24,564 INFO L125 PetriNetUnfolderBase]: For 606876/606890 co-relation queries the response was YES. [2024-06-28 03:11:24,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89427 conditions, 10209 events. 6552/10209 cut-off events. For 606876/606890 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 65409 event pairs, 2192 based on Foata normal form. 14/10221 useless extension candidates. Maximal degree in co-relation 89276. Up to 9577 conditions per place. [2024-06-28 03:11:24,696 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 514 selfloop transitions, 158 changer transitions 0/675 dead transitions. [2024-06-28 03:11:24,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 675 transitions, 14993 flow [2024-06-28 03:11:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:11:24,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:11:24,697 INFO L175 Difference]: Start difference. First operand has 334 places, 642 transitions, 13218 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:11:24,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 675 transitions, 14993 flow [2024-06-28 03:11:26,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 675 transitions, 14753 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-28 03:11:26,670 INFO L231 Difference]: Finished difference. Result has 340 places, 647 transitions, 13446 flow [2024-06-28 03:11:26,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12978, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13446, PETRI_PLACES=340, PETRI_TRANSITIONS=647} [2024-06-28 03:11:26,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-28 03:11:26,671 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 647 transitions, 13446 flow [2024-06-28 03:11:26,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:26,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:26,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:26,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:11:26,671 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:26,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash 641324532, now seen corresponding path program 5 times [2024-06-28 03:11:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:26,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294780252] [2024-06-28 03:11:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:27,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:27,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294780252] [2024-06-28 03:11:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294780252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:27,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:27,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:11:27,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356957472] [2024-06-28 03:11:27,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:27,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:11:27,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:11:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:11:27,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:27,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 647 transitions, 13446 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:27,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:27,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:29,790 INFO L124 PetriNetUnfolderBase]: 6622/10304 cut-off events. [2024-06-28 03:11:29,790 INFO L125 PetriNetUnfolderBase]: For 641990/642004 co-relation queries the response was YES. [2024-06-28 03:11:29,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91509 conditions, 10304 events. 6622/10304 cut-off events. For 641990/642004 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 65931 event pairs, 2203 based on Foata normal form. 18/10320 useless extension candidates. Maximal degree in co-relation 91355. Up to 9440 conditions per place. [2024-06-28 03:11:29,957 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 173 changer transitions 0/690 dead transitions. [2024-06-28 03:11:29,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 690 transitions, 15571 flow [2024-06-28 03:11:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:11:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:11:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:11:29,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 03:11:29,958 INFO L175 Difference]: Start difference. First operand has 340 places, 647 transitions, 13446 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:11:29,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 690 transitions, 15571 flow [2024-06-28 03:11:31,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 690 transitions, 15262 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 03:11:31,671 INFO L231 Difference]: Finished difference. Result has 343 places, 662 transitions, 13972 flow [2024-06-28 03:11:31,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13141, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13972, PETRI_PLACES=343, PETRI_TRANSITIONS=662} [2024-06-28 03:11:31,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-28 03:11:31,671 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 662 transitions, 13972 flow [2024-06-28 03:11:31,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:31,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:31,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:31,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:11:31,672 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:31,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash 650375199, now seen corresponding path program 3 times [2024-06-28 03:11:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100904774] [2024-06-28 03:11:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:32,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:32,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100904774] [2024-06-28 03:11:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100904774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:32,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:11:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439611495] [2024-06-28 03:11:32,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:32,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:11:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:11:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:11:32,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:32,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 662 transitions, 13972 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:32,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:32,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:32,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:34,766 INFO L124 PetriNetUnfolderBase]: 6650/10349 cut-off events. [2024-06-28 03:11:34,766 INFO L125 PetriNetUnfolderBase]: For 653071/653099 co-relation queries the response was YES. [2024-06-28 03:11:34,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93292 conditions, 10349 events. 6650/10349 cut-off events. For 653071/653099 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 66248 event pairs, 2281 based on Foata normal form. 28/10375 useless extension candidates. Maximal degree in co-relation 93136. Up to 9852 conditions per place. [2024-06-28 03:11:34,911 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 577 selfloop transitions, 115 changer transitions 0/695 dead transitions. [2024-06-28 03:11:34,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 695 transitions, 16095 flow [2024-06-28 03:11:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:11:34,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:11:34,912 INFO L175 Difference]: Start difference. First operand has 343 places, 662 transitions, 13972 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:11:34,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 695 transitions, 16095 flow [2024-06-28 03:11:36,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 695 transitions, 15922 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-28 03:11:36,689 INFO L231 Difference]: Finished difference. Result has 348 places, 675 transitions, 14484 flow [2024-06-28 03:11:36,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13803, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14484, PETRI_PLACES=348, PETRI_TRANSITIONS=675} [2024-06-28 03:11:36,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-28 03:11:36,689 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 675 transitions, 14484 flow [2024-06-28 03:11:36,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:36,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:36,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:36,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:11:36,690 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:36,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 650582589, now seen corresponding path program 4 times [2024-06-28 03:11:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:36,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286062828] [2024-06-28 03:11:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:37,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:37,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286062828] [2024-06-28 03:11:37,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286062828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:37,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:37,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:11:37,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462158286] [2024-06-28 03:11:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:37,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:11:37,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:11:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:11:37,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:37,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 675 transitions, 14484 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:37,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:37,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:37,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:39,626 INFO L124 PetriNetUnfolderBase]: 6644/10337 cut-off events. [2024-06-28 03:11:39,626 INFO L125 PetriNetUnfolderBase]: For 644924/644952 co-relation queries the response was YES. [2024-06-28 03:11:39,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93338 conditions, 10337 events. 6644/10337 cut-off events. For 644924/644952 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 66121 event pairs, 2225 based on Foata normal form. 26/10361 useless extension candidates. Maximal degree in co-relation 93179. Up to 9847 conditions per place. [2024-06-28 03:11:39,787 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 581 selfloop transitions, 107 changer transitions 0/691 dead transitions. [2024-06-28 03:11:39,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 691 transitions, 16164 flow [2024-06-28 03:11:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:11:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:11:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:11:39,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:11:39,788 INFO L175 Difference]: Start difference. First operand has 348 places, 675 transitions, 14484 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:11:39,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 691 transitions, 16164 flow [2024-06-28 03:11:41,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 691 transitions, 16006 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-28 03:11:41,569 INFO L231 Difference]: Finished difference. Result has 351 places, 675 transitions, 14562 flow [2024-06-28 03:11:41,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14330, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14562, PETRI_PLACES=351, PETRI_TRANSITIONS=675} [2024-06-28 03:11:41,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-28 03:11:41,569 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 675 transitions, 14562 flow [2024-06-28 03:11:41,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:41,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:41,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:41,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:11:41,570 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:41,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1400819435, now seen corresponding path program 5 times [2024-06-28 03:11:41,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:41,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872243654] [2024-06-28 03:11:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:41,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872243654] [2024-06-28 03:11:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872243654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:42,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:42,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:11:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474008959] [2024-06-28 03:11:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:11:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:11:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:11:42,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:11:42,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 675 transitions, 14562 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:42,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:42,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:11:42,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:45,307 INFO L124 PetriNetUnfolderBase]: 6678/10433 cut-off events. [2024-06-28 03:11:45,308 INFO L125 PetriNetUnfolderBase]: For 719568/719600 co-relation queries the response was YES. [2024-06-28 03:11:45,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95171 conditions, 10433 events. 6678/10433 cut-off events. For 719568/719600 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 67597 event pairs, 2029 based on Foata normal form. 36/10421 useless extension candidates. Maximal degree in co-relation 95012. Up to 9138 conditions per place. [2024-06-28 03:11:45,455 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 509 selfloop transitions, 174 changer transitions 0/721 dead transitions. [2024-06-28 03:11:45,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 721 transitions, 16344 flow [2024-06-28 03:11:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:11:45,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-28 03:11:45,457 INFO L175 Difference]: Start difference. First operand has 351 places, 675 transitions, 14562 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:11:45,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 721 transitions, 16344 flow [2024-06-28 03:11:47,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 721 transitions, 16166 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 03:11:47,202 INFO L231 Difference]: Finished difference. Result has 354 places, 678 transitions, 14890 flow [2024-06-28 03:11:47,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14384, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14890, PETRI_PLACES=354, PETRI_TRANSITIONS=678} [2024-06-28 03:11:47,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-28 03:11:47,203 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 678 transitions, 14890 flow [2024-06-28 03:11:47,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:47,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:47,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:47,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:11:47,204 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:11:47,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:47,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1602116639, now seen corresponding path program 3 times [2024-06-28 03:11:47,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:47,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690879302] [2024-06-28 03:11:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:48,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:48,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690879302] [2024-06-28 03:11:48,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690879302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:48,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:48,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:11:48,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036250865] [2024-06-28 03:11:48,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:48,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:11:48,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:48,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:11:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:11:48,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:11:48,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 678 transitions, 14890 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:48,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:48,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:11:48,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:50,972 INFO L124 PetriNetUnfolderBase]: 6839/10637 cut-off events. [2024-06-28 03:11:50,972 INFO L125 PetriNetUnfolderBase]: For 690368/690382 co-relation queries the response was YES. [2024-06-28 03:11:51,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96762 conditions, 10637 events. 6839/10637 cut-off events. For 690368/690382 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 68494 event pairs, 2249 based on Foata normal form. 24/10659 useless extension candidates. Maximal degree in co-relation 96603. Up to 9385 conditions per place. [2024-06-28 03:11:51,124 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 465 selfloop transitions, 264 changer transitions 0/732 dead transitions. [2024-06-28 03:11:51,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 732 transitions, 17202 flow [2024-06-28 03:11:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:11:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:11:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-28 03:11:51,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-28 03:11:51,125 INFO L175 Difference]: Start difference. First operand has 354 places, 678 transitions, 14890 flow. Second operand 11 states and 203 transitions. [2024-06-28 03:11:51,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 732 transitions, 17202 flow [2024-06-28 03:11:52,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 732 transitions, 16740 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-28 03:11:52,880 INFO L231 Difference]: Finished difference. Result has 359 places, 693 transitions, 15341 flow [2024-06-28 03:11:52,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14434, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15341, PETRI_PLACES=359, PETRI_TRANSITIONS=693} [2024-06-28 03:11:52,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-28 03:11:52,881 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 693 transitions, 15341 flow [2024-06-28 03:11:52,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:52,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:52,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:52,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:11:52,881 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)] === [2024-06-28 03:11:52,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2145837285, now seen corresponding path program 6 times [2024-06-28 03:11:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:52,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226387757] [2024-06-28 03:11:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:52,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:11:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:11:54,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:11:54,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226387757] [2024-06-28 03:11:54,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226387757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:11:54,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:11:54,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:11:54,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267946111] [2024-06-28 03:11:54,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:11:54,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:11:54,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:11:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:11:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:11:54,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:11:54,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 693 transitions, 15341 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:54,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:11:54,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:11:54,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:11:56,842 INFO L124 PetriNetUnfolderBase]: 6869/10746 cut-off events. [2024-06-28 03:11:56,842 INFO L125 PetriNetUnfolderBase]: For 747263/747308 co-relation queries the response was YES. [2024-06-28 03:11:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99760 conditions, 10746 events. 6869/10746 cut-off events. For 747263/747308 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 70112 event pairs, 2084 based on Foata normal form. 48/10758 useless extension candidates. Maximal degree in co-relation 99599. Up to 9444 conditions per place. [2024-06-28 03:11:56,987 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 538 selfloop transitions, 161 changer transitions 0/737 dead transitions. [2024-06-28 03:11:56,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 737 transitions, 17155 flow [2024-06-28 03:11:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:11:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:11:56,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:11:56,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-28 03:11:56,988 INFO L175 Difference]: Start difference. First operand has 359 places, 693 transitions, 15341 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:11:56,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 737 transitions, 17155 flow [2024-06-28 03:11:59,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 737 transitions, 16722 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-28 03:11:59,225 INFO L231 Difference]: Finished difference. Result has 361 places, 696 transitions, 15391 flow [2024-06-28 03:11:59,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14908, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15391, PETRI_PLACES=361, PETRI_TRANSITIONS=696} [2024-06-28 03:11:59,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-28 03:11:59,225 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 696 transitions, 15391 flow [2024-06-28 03:11:59,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:11:59,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:11:59,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:11:59,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:11:59,226 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)] === [2024-06-28 03:11:59,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:11:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1543552405, now seen corresponding path program 7 times [2024-06-28 03:11:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:11:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948681601] [2024-06-28 03:11:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:11:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:11:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948681601] [2024-06-28 03:12:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948681601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:00,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:12:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124789011] [2024-06-28 03:12:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:12:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:12:00,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:12:00,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:12:00,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 696 transitions, 15391 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:00,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:00,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:12:00,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:03,400 INFO L124 PetriNetUnfolderBase]: 6970/10919 cut-off events. [2024-06-28 03:12:03,400 INFO L125 PetriNetUnfolderBase]: For 784425/784470 co-relation queries the response was YES. [2024-06-28 03:12:03,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101771 conditions, 10919 events. 6970/10919 cut-off events. For 784425/784470 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 71777 event pairs, 2031 based on Foata normal form. 48/10921 useless extension candidates. Maximal degree in co-relation 101608. Up to 9220 conditions per place. [2024-06-28 03:12:03,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 186 changer transitions 0/737 dead transitions. [2024-06-28 03:12:03,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 737 transitions, 17148 flow [2024-06-28 03:12:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:12:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:12:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:12:03,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-28 03:12:03,559 INFO L175 Difference]: Start difference. First operand has 361 places, 696 transitions, 15391 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:12:03,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 737 transitions, 17148 flow [2024-06-28 03:12:05,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 737 transitions, 16711 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-28 03:12:05,903 INFO L231 Difference]: Finished difference. Result has 363 places, 699 transitions, 15493 flow [2024-06-28 03:12:05,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14956, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15493, PETRI_PLACES=363, PETRI_TRANSITIONS=699} [2024-06-28 03:12:05,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-28 03:12:05,904 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 699 transitions, 15493 flow [2024-06-28 03:12:05,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:05,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:05,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:05,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:12:05,905 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:05,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:05,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1167966261, now seen corresponding path program 5 times [2024-06-28 03:12:05,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:05,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098308120] [2024-06-28 03:12:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:05,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:06,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:06,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098308120] [2024-06-28 03:12:06,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098308120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:06,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:06,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:06,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156664418] [2024-06-28 03:12:06,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:06,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:06,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:06,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:06,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:12:06,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 699 transitions, 15493 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:06,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:06,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:12:06,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:09,958 INFO L124 PetriNetUnfolderBase]: 7041/10977 cut-off events. [2024-06-28 03:12:09,959 INFO L125 PetriNetUnfolderBase]: For 699541/699569 co-relation queries the response was YES. [2024-06-28 03:12:10,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100877 conditions, 10977 events. 7041/10977 cut-off events. For 699541/699569 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 71281 event pairs, 2430 based on Foata normal form. 26/11001 useless extension candidates. Maximal degree in co-relation 100713. Up to 10472 conditions per place. [2024-06-28 03:12:10,103 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 601 selfloop transitions, 116 changer transitions 0/720 dead transitions. [2024-06-28 03:12:10,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 720 transitions, 17307 flow [2024-06-28 03:12:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 03:12:10,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:12:10,104 INFO L175 Difference]: Start difference. First operand has 363 places, 699 transitions, 15493 flow. Second operand 8 states and 136 transitions. [2024-06-28 03:12:10,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 720 transitions, 17307 flow [2024-06-28 03:12:11,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 720 transitions, 16814 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-28 03:12:11,970 INFO L231 Difference]: Finished difference. Result has 364 places, 703 transitions, 15326 flow [2024-06-28 03:12:11,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15004, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15326, PETRI_PLACES=364, PETRI_TRANSITIONS=703} [2024-06-28 03:12:11,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-28 03:12:11,971 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 703 transitions, 15326 flow [2024-06-28 03:12:11,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:11,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:11,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:11,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:12:11,971 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:11,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:11,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1167966602, now seen corresponding path program 6 times [2024-06-28 03:12:11,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:11,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360071367] [2024-06-28 03:12:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:11,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:12,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360071367] [2024-06-28 03:12:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360071367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:12,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:12:12,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954515184] [2024-06-28 03:12:12,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:12,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:12:12,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:12,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:12:12,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:12:12,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:12:12,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 703 transitions, 15326 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:12,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:12,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:12:12,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:15,757 INFO L124 PetriNetUnfolderBase]: 7173/11160 cut-off events. [2024-06-28 03:12:15,757 INFO L125 PetriNetUnfolderBase]: For 721561/721589 co-relation queries the response was YES. [2024-06-28 03:12:15,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102326 conditions, 11160 events. 7173/11160 cut-off events. For 721561/721589 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 72461 event pairs, 2404 based on Foata normal form. 30/11188 useless extension candidates. Maximal degree in co-relation 102161. Up to 10183 conditions per place. [2024-06-28 03:12:15,911 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 576 selfloop transitions, 174 changer transitions 0/753 dead transitions. [2024-06-28 03:12:15,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 753 transitions, 17920 flow [2024-06-28 03:12:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:12:15,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-28 03:12:15,912 INFO L175 Difference]: Start difference. First operand has 364 places, 703 transitions, 15326 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:12:15,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 753 transitions, 17920 flow [2024-06-28 03:12:17,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 753 transitions, 17733 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:12:17,958 INFO L231 Difference]: Finished difference. Result has 368 places, 724 transitions, 16128 flow [2024-06-28 03:12:17,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15139, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16128, PETRI_PLACES=368, PETRI_TRANSITIONS=724} [2024-06-28 03:12:17,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-28 03:12:17,958 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 724 transitions, 16128 flow [2024-06-28 03:12:17,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:17,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:17,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:17,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:12:17,959 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:17,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:17,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1440697650, now seen corresponding path program 7 times [2024-06-28 03:12:17,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:17,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402725611] [2024-06-28 03:12:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:17,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:18,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:18,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402725611] [2024-06-28 03:12:18,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402725611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:18,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:18,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:12:18,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459284259] [2024-06-28 03:12:18,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:18,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:12:18,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:12:18,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:12:18,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:12:18,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 724 transitions, 16128 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:18,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:18,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:12:18,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:21,881 INFO L124 PetriNetUnfolderBase]: 7161/11145 cut-off events. [2024-06-28 03:12:21,881 INFO L125 PetriNetUnfolderBase]: For 729861/729889 co-relation queries the response was YES. [2024-06-28 03:12:21,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102818 conditions, 11145 events. 7161/11145 cut-off events. For 729861/729889 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 72385 event pairs, 2407 based on Foata normal form. 30/11173 useless extension candidates. Maximal degree in co-relation 102651. Up to 10179 conditions per place. [2024-06-28 03:12:22,046 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 575 selfloop transitions, 172 changer transitions 0/750 dead transitions. [2024-06-28 03:12:22,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 750 transitions, 18165 flow [2024-06-28 03:12:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:12:22,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-28 03:12:22,047 INFO L175 Difference]: Start difference. First operand has 368 places, 724 transitions, 16128 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:12:22,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 750 transitions, 18165 flow [2024-06-28 03:12:24,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 750 transitions, 17835 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-28 03:12:24,135 INFO L231 Difference]: Finished difference. Result has 372 places, 724 transitions, 16172 flow [2024-06-28 03:12:24,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15804, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16172, PETRI_PLACES=372, PETRI_TRANSITIONS=724} [2024-06-28 03:12:24,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-28 03:12:24,136 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 724 transitions, 16172 flow [2024-06-28 03:12:24,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:24,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:24,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:24,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:12:24,136 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:24,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 724832811, now seen corresponding path program 5 times [2024-06-28 03:12:24,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:24,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841355062] [2024-06-28 03:12:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:24,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841355062] [2024-06-28 03:12:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841355062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:24,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:24,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:12:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410868246] [2024-06-28 03:12:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:24,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:12:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:12:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:12:24,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:12:24,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 724 transitions, 16172 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:24,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:24,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:12:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:27,739 INFO L124 PetriNetUnfolderBase]: 7135/11108 cut-off events. [2024-06-28 03:12:27,739 INFO L125 PetriNetUnfolderBase]: For 725176/725176 co-relation queries the response was YES. [2024-06-28 03:12:27,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101991 conditions, 11108 events. 7135/11108 cut-off events. For 725176/725176 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 72125 event pairs, 3011 based on Foata normal form. 2/11109 useless extension candidates. Maximal degree in co-relation 101824. Up to 10904 conditions per place. [2024-06-28 03:12:27,888 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 706 selfloop transitions, 31 changer transitions 0/740 dead transitions. [2024-06-28 03:12:27,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 740 transitions, 17866 flow [2024-06-28 03:12:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:12:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:12:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:12:27,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-28 03:12:27,889 INFO L175 Difference]: Start difference. First operand has 372 places, 724 transitions, 16172 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:12:27,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 740 transitions, 17866 flow [2024-06-28 03:12:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 740 transitions, 17494 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 03:12:29,913 INFO L231 Difference]: Finished difference. Result has 372 places, 724 transitions, 15874 flow [2024-06-28 03:12:29,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15802, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15874, PETRI_PLACES=372, PETRI_TRANSITIONS=724} [2024-06-28 03:12:29,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-28 03:12:29,914 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 724 transitions, 15874 flow [2024-06-28 03:12:29,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:29,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:29,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:12:29,915 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:29,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:29,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1445752929, now seen corresponding path program 6 times [2024-06-28 03:12:29,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:29,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469446395] [2024-06-28 03:12:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:29,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:30,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469446395] [2024-06-28 03:12:30,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469446395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:30,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:30,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:12:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271377792] [2024-06-28 03:12:30,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:30,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:12:30,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:12:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:12:30,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:12:30,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 724 transitions, 15874 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:30,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:30,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:12:30,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:33,614 INFO L124 PetriNetUnfolderBase]: 7140/11114 cut-off events. [2024-06-28 03:12:33,614 INFO L125 PetriNetUnfolderBase]: For 719038/719038 co-relation queries the response was YES. [2024-06-28 03:12:33,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101334 conditions, 11114 events. 7140/11114 cut-off events. For 719038/719038 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 72165 event pairs, 3009 based on Foata normal form. 1/11114 useless extension candidates. Maximal degree in co-relation 101167. Up to 10931 conditions per place. [2024-06-28 03:12:33,779 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 715 selfloop transitions, 21 changer transitions 0/739 dead transitions. [2024-06-28 03:12:33,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 739 transitions, 17493 flow [2024-06-28 03:12:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-28 03:12:33,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-28 03:12:33,780 INFO L175 Difference]: Start difference. First operand has 372 places, 724 transitions, 15874 flow. Second operand 8 states and 121 transitions. [2024-06-28 03:12:33,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 739 transitions, 17493 flow [2024-06-28 03:12:35,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 739 transitions, 17036 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-28 03:12:35,903 INFO L231 Difference]: Finished difference. Result has 370 places, 727 transitions, 15568 flow [2024-06-28 03:12:35,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15433, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15568, PETRI_PLACES=370, PETRI_TRANSITIONS=727} [2024-06-28 03:12:35,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-28 03:12:35,904 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 727 transitions, 15568 flow [2024-06-28 03:12:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:35,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:35,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:12:35,904 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:35,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash 89171047, now seen corresponding path program 8 times [2024-06-28 03:12:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400616157] [2024-06-28 03:12:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:36,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400616157] [2024-06-28 03:12:36,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400616157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:36,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:36,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:12:36,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941863346] [2024-06-28 03:12:36,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:36,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:12:36,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:36,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:12:36,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:12:37,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:12:37,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 727 transitions, 15568 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:37,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:37,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:12:37,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:40,326 INFO L124 PetriNetUnfolderBase]: 7169/11203 cut-off events. [2024-06-28 03:12:40,327 INFO L125 PetriNetUnfolderBase]: For 803982/804013 co-relation queries the response was YES. [2024-06-28 03:12:40,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103049 conditions, 11203 events. 7169/11203 cut-off events. For 803982/804013 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 73508 event pairs, 2060 based on Foata normal form. 34/11189 useless extension candidates. Maximal degree in co-relation 102882. Up to 9294 conditions per place. [2024-06-28 03:12:40,475 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 210 changer transitions 0/766 dead transitions. [2024-06-28 03:12:40,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 766 transitions, 17383 flow [2024-06-28 03:12:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:12:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-28 03:12:40,476 INFO L175 Difference]: Start difference. First operand has 370 places, 727 transitions, 15568 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:12:40,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 766 transitions, 17383 flow [2024-06-28 03:12:42,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 766 transitions, 17331 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:42,582 INFO L231 Difference]: Finished difference. Result has 372 places, 730 transitions, 16118 flow [2024-06-28 03:12:42,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15516, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16118, PETRI_PLACES=372, PETRI_TRANSITIONS=730} [2024-06-28 03:12:42,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-28 03:12:42,583 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 730 transitions, 16118 flow [2024-06-28 03:12:42,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:42,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:42,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:42,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:12:42,583 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:42,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:42,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2120466805, now seen corresponding path program 9 times [2024-06-28 03:12:42,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:42,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446679377] [2024-06-28 03:12:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:12:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:12:43,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:12:43,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446679377] [2024-06-28 03:12:43,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446679377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:12:43,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:12:43,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:12:43,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765916277] [2024-06-28 03:12:43,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:12:43,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:12:43,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:12:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:12:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:12:43,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:12:43,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 730 transitions, 16118 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:43,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:12:43,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:12:43,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:12:46,921 INFO L124 PetriNetUnfolderBase]: 7128/11158 cut-off events. [2024-06-28 03:12:46,922 INFO L125 PetriNetUnfolderBase]: For 804014/804059 co-relation queries the response was YES. [2024-06-28 03:12:47,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102850 conditions, 11158 events. 7128/11158 cut-off events. For 804014/804059 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 73585 event pairs, 1990 based on Foata normal form. 46/11158 useless extension candidates. Maximal degree in co-relation 102682. Up to 9004 conditions per place. [2024-06-28 03:12:47,078 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 219 changer transitions 0/760 dead transitions. [2024-06-28 03:12:47,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 760 transitions, 17686 flow [2024-06-28 03:12:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:12:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:12:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:12:47,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 03:12:47,079 INFO L175 Difference]: Start difference. First operand has 372 places, 730 transitions, 16118 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:12:47,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 760 transitions, 17686 flow [2024-06-28 03:12:49,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 760 transitions, 17136 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-28 03:12:49,444 INFO L231 Difference]: Finished difference. Result has 374 places, 730 transitions, 16022 flow [2024-06-28 03:12:49,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15568, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16022, PETRI_PLACES=374, PETRI_TRANSITIONS=730} [2024-06-28 03:12:49,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-28 03:12:49,445 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 730 transitions, 16022 flow [2024-06-28 03:12:49,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:12:49,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:12:49,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:12:49,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:12:49,445 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:12:49,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:12:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1767147893, now seen corresponding path program 10 times [2024-06-28 03:12:49,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:12:49,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104358332] [2024-06-28 03:12:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:12:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:12:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat